Dynamic Overclocking of 980X

[Timmah!]

Hi there,

can anyone here give advice regarding overclocking i7 980X? I am not going for some crazy clocks, actually i would like to overclock it only without upping vcore - as much as possible - so i suppose only to 3,7 - 3,8 GHz range, but that will be fine

However i would like not to do classic "static" overclock", but i would like to keep speedstep and turbo on...i read somewhere you can manually set parameters for Turbo speedbins and by using this method you can achieve exactly what i want...
but there is little info about this, i really tried and googled hard, but found nothing very helpful, so i am not sure, if it is possible, how to do it and if it is safe/stable

My specs are i7 980x cooled by zalman cnps 10x performa, gigabyte x58a ud7 rev 1.0 and 6x2 GB Kingston HyperX 1333 cl9 (cl7 wiith XMP, but did not use it so far)

Thanks in advance

 

[aigomorla]

okey when your overclocking you can not get turbo on to work

Overclocking disables turbo on as far as i know.
Because Turbo on is Overclocking.

Now you want a standard 3.7ghz, why not just leave it at stock.

The stock 980 is a 3.325 stock clock which is a 133x25.
Turbo on would bump that multi +1 to a 26 x 133 = 3.458

Believe me you wont notice jack squat between 3.8 vs 3.5.
Especially since you wont be tweeking your ram timings.

My 2 cents.. for what you want, on that cpu, its best to leave at stock.
If you want to go higher, per say 4ghz and onward, your gonna need to give up some stuff like turbo on, and C1E.

C1E can crash a system thats overclocked.
When the values drop its multi to idle values, if you lack the vcore requirements when it throttles, your system will crash.

Basically if you want all the saving features on that cpu, just run it stock.

 

[Timmah!]

okey when your overclocking you can not get turbo on to work

Overclocking disables turbo on as far as i know.
Because Turbo on is Overclocking.

Now you want a standard 3.7ghz, why not just leave it at stock.

The stock 980 is a 3.325 stock clock which is a 133x25.
Turbo on would bump that multi +1 to a 26 x 133 = 3.458

Believe me you wont notice jack squat between 3.8 vs 3.5.
Especially since you wont be tweeking your ram timings.

My 2 cents.. for what you want, on that cpu, its best to leave at stock.
If you want to go higher, per say 4ghz and onward, your gonna need to give up some stuff like turbo on, and C1E.

C1E can crash a system thats overclocked.
When the values drop its multi to idle values, if you lack the vcore requirements when it throttles, your system will crash.

Basically if you want all the saving features on that cpu, just run it stock.

Thanks for your answer.
I do not know how far can i push my chip without voltage increase, maybe ive got golden chip, you never know
I was talking about overclocking via changing turbo parameters, where you should be able to change for example multiplier from 26x to 27x/28x, set how many cores should be activated/overclocked etc...for every Turbo speed incement...
everything while C1E is on...
at least this is how i understood it, but maybe i am wrong

finally i do not want to overclock it classic way, cause i do not want to keep my system to draw million Watts even when it is idle...
but i disagree with you regarding difference between 3,5 and 3,8 GHz
for benchers and overclockers i suppose unless it is 6 GHz overclock, it is nothing
but i do not want to overclock just for the sake of it, i built this system for architectural visualisation with Vray and surely you believe me that even 10 percent increase in rendering speed is worthy

 

[khon]

A man after my own heart

I plan to overclock my unlocked SB the same way, once I can buy it that is.

Not sure how it works with the i7-980X, but I have a link describing how it's done with the i7-875K, which might help you:

http://techreport.com/articles.x/18988/3

One key quote from there though:

"Gigabyte's recent BIOSes do support the K-series chips' unlocked multipliers, but they don't give you control over individual Turbo multipliers."

 

[aigomorla]

I was talking about overclocking via changing turbo parameters, where you should be able to change for example multiplier from 26x to 27x/28x, set how many cores should be activated/overclocked etc...for every Turbo speed incement...
everything while C1E is on...
at least this is how i understood it, but maybe i am wrong

i dont think there is a feature like that on any cpu.

The turbo on states are built into the chip and not the board.
A feature like that would have be controlled at the board level, like khon above me posted.

My 980X is on a classified.
I can change the multi on each core via software on the fly if that what you mean?
However i cant program a turbo on for each core.

Your playing the classic game of need / want.
However your want is way greater then your need.

If you want to unlock that chip and let it roar, you will need to give it vcore and unleash it.
However you are only half correct about that chip.

Our gulftown has a built in feature that disables unused cores, so even @ 4ghz, your idle should be fairly acceptable.

Here:
http://www.neoseeker.com/Articles/Hardware/Reviews/intel_core_i7_980x/4.html

 

[Idontcare]

It really sounds like the OP has Intel's dynamic OC confused with AMD's software program that lets you set each core's clockspeed with a seperate multiplier. At least that is what I'm getting from this thread so far.

 

[adamantinepiggy]

Well I have the 980x on a ASRock Extreme and lightly OC the turbo-mode multiplier in the BIOS. I did have it at 4GHz straight OC, but this was overkill for the stuff I normally do (outside of benchmarking). So what I did was simply to enable the full 27x turbo on every core. Normally only 2 cores are allowed to jump to 27x while the other 4 are limited to 26x. So when I need it, any of the CPU's can jump to 3.6Ghz (or all at once like in Prime95 full loads). This gives me the faster speeds, but lets it drop back to full energy saving levels. I can even do 28x all 6-core turbo at stock voltage, but I don't notice any difference between 27x and 28x. Hell, unless I'm running benchmarks, I dont see a lick of difference between 3.6Ghz and 4Ghz, so figured, why waste the power.

 

[Timmah!]

Well I have the 980x on a ASRock Extreme and lightly OC the turbo-mode multiplier in the BIOS. I did have it at 4GHz straight OC, but this was overkill for the stuff I normally do (outside of benchmarking). So what I did was simply to enable the full 27x turbo on every core. Normally only 2 cores are allowed to jump to 27x while the other 4 are limited to 26x. So when I need it, any of the CPU's can jump to 3.6Ghz (or all at once like in Prime95 full loads). This gives me the faster speeds, but lets it drop back to full energy saving levels. I can even do 28x all 6-core turbo at stock voltage, but I don't notice any difference between 27x and 28x. Hell, unless I'm running benchmarks, I dont see a lick of difference between 3.6Ghz and 4Ghz, so figured, why waste the power.

I believe what you do is exactly what i meant...bumping the multiplier of the turbo and setting how many cores should be affected by this...

@Aigo> I did not know about the low power consumption at idle....thanks for the info
anyway...since when is running chip, which is binned at 3,33 but perfectly capable of 3,8 at the same voltage, more than people need?

EDIT: I googled again and found this, surprisingly thread on this very forum:

http://forums.anandtech.com/showthread.php?t=240680

 

[aigomorla]

EDIT: I googled again and found this, surprisingly thread on this very forum:

http://forums.anandtech.com/showthread.php?t=240680

No your not understanding Turbo on vs Pure Overclocking.

Thanks for the info. Great to get a confirmation.

"Both boards let you set turbo multipliers on individual cores. "

Just want to clarify this in case of consfusion Is it really setting the muliplier for each individual core?

In that regards he is talking about each core being allowed to be changed.

Turbo On means.. when your system is doing tasks it loads up cores.
In a non 980X situation.. ie like a 1156 platform, these guys get a +2 turbo on 2 cores, and a +1 turbo on all cores.

What that means is when a software is looking at only 2 cores, under load, you will get a nice +2 multi on only 2 of your cores.

If you run into a program which can use all 4 cores, then all your cores will get a boost of +1 under load.

The key thing is under load.

Now the 980X doesnt really follow that, because it just disables unused cores, and enables used cores.

The turbo on a 980X is +1... stock multi is 25.. with turbo its 26.
If you try to go higher windows 7 will not report the excess multi after 25.

Now the thing im getting confused is your telling me you want a turbo on to work for a higher value then whats the cpu itself is programed for.

That is called overclocking.
There are softwares which will ramp your OC on the fly, but as i said this is @ the board level, not the chip level.

Otherwise im wondering if u just mean this:

You see how they say Turbo Mode Control?
Well its not really turbo mode control, its a multiplier setting they called "turbo mode control". If i change those, my values will imediately change on the fly.

But its not a True Turbo on.

I run my system @ 4.2 24/7.
But i dont really care about the power draw since my gpu's probably gobble 4x the voltage on idle, then my cpu does.

 

[coffeejunkee]

Hi,

If you want to see how far you can get on default voltage and still be able to use lower voltage/clocks in idle you should set the vcore to 'normal', not auto or a keyed in value. Your mobo will now use the default vcore values no matter what bclk you set. Leave EIST enabled, this controls the clocks and vcore lowering. You can probably leave C3/C6/C7 states and C1E enabled as well, these only cause instability at higher bclk like 180+. I think you can probably leave Turbo enabled as well when you dont oc very high.
If you want to add vcore to increase the cpu frequency, leave vcore at normal and choose an offset value from the dynamic vcore range. This controls the amount of Volts added to the idle and load voltages (fex. normal vcore fluctuates between 1.0 idle and 1.3 load, choose offset +0.05 and this will change to 1.05 idle and 1.35 load.)
What you're referring to as turbo overclocking is probably only possible on the 875k combined with a mobo that supports the feature but i might be mistaken here.
What I do know for sure is that it is not possible with i5 750 i own. However, overclocking with Turbo mode enabled works just fine for this cpu. I have it running at bclk 175, turbo boost up to 4.2 GHz for 1/2 cores and 3.675 GHz for 4 cores. Obviously this won't work so well with the 980X because of its less aggresive Turbo mode.

 

[Elganja]

I've had no issues using C1E with my overclock... granted mine is a i7930, but it is running at 20x200 and my i7920 before it, I ran at 19x200... both with vdroop on as well (no turbo and ht enabled)

In anycase, no issues downclocking (usually goes down to 12x multiplyer) and returning to 20x

 

[aigomorla]

I've had no issues using C1E with my overclock... granted mine is a i7930, but it is running at 20x200 and my i7920 before it, I ran at 19x200... both with vdroop on as well (no turbo and ht enabled)

In anycase, no issues downclocking (usually goes down to 12x multiplyer) and returning to 20x

are you on a stock voltage?



the op wishes to be on stock voltage, which is why i am telling him either go for OC, or stay @ stock.

 

[Elganja]

are you on a stock voltage?



the op wishes to be on stock voltage, which is why i am telling him either go for OC, or stay @ stock.

see my sig

1.325 (with vdroop), so not stock

 

[james1701]

Depending on your mobo, you can change the blk to 143 and not touch the multiplier. You will still have turbo. That will get you just over 3.5ghz and over 3.7ghz and up turbo'd. If you change the multiplier, it shuts off turbo, but not when adjusting the blk, at least on a RE3 board. Depending on settings, it will go higher than a 26 turbo, if conditions are right.

I have found with that setting and with memory running at 2000, I can Fold almost as fast as everyone on 4ghz, and gaming works really well to. I leave all the C1E and all the power saving stuff enabled and works flawlessly.

If I want to run 4ghz, I had to set the voltage to 1.25, and with load line calibration at the default settings, the voltage went up to 1.28, and a multi of 30, and had over 30 continuous hours of P95 with no problems. Any more voltage than that, my H50 would not handle it well. P95 on those settings were 73C.

 

[JAG87]

okey when your overclocking you can not get turbo on to work

Overclocking disables turbo on as far as i know.
Because Turbo on is Overclocking.

Now you want a standard 3.7ghz, why not just leave it at stock.

The stock 980 is a 3.325 stock clock which is a 133x25.
Turbo on would bump that multi +1 to a 26 x 133 = 3.458

Believe me you wont notice jack squat between 3.8 vs 3.5.
Especially since you wont be tweeking your ram timings.

My 2 cents.. for what you want, on that cpu, its best to leave at stock.
If you want to go higher, per say 4ghz and onward, your gonna need to give up some stuff like turbo on, and C1E.

C1E can crash a system thats overclocked.
When the values drop its multi to idle values, if you lack the vcore requirements when it throttles, your system will crash.

Basically if you want all the saving features on that cpu, just run it stock.

I disagree. Probably the biggest advantage of an unlocked processor is being able to overclock while retaining all the power saving features as intended.

Since you don't need to touch the base clock, you can leave everything alone and just up the multiplier until you are no longer stable. The only thing you need to watch out for is that past a certain clock speed most motherboards will give more vcore when set to Auto. Unfortunately you need vcore set to Auto if you want your C1E voltages to work. I would set Turbo to OFF, unless it allows you to get that extra multiplier at load while fooling your motherboard into not giving more voltage, which could be great if you are stable!

Rest assured that when C1E kicks in, you will return to 12x multiplier and the proper VID for it. That way you get both speed and power saving. IMO past 29x multi you will see that either your board will pump more voltage (destroying your load power and temps), or you will lose stability at stock voltage.

 

[aigomorla]

I disagree. Probably the biggest advantage of an unlocked processor is bein or you will lose stability at stock voltage.

he wants to run it @ stock voltage + overclocking + C1E.

Which is why i said he was asking for too much.

Hi there,

can anyone here give advice regarding overclocking i7 980X? I am not going for some crazy clocks, actually i would like to overclock it only without upping vcore - as much as possible - so i suppose only to 3,7 - 3,8 GHz range, but that will be fine

If he doesnt mind upping vcore to 1.3, i dont think he would have any problems.

And leaving QPI/DRAM VTT, and Vcore on Auto is the three biggest taboo's in Overclocking.
Unless as JAG said, its a very small overclock.

 

[Timmah!]

No your not understanding Turbo on vs Pure Overclocking.



In that regards he is talking about each core being allowed to be changed.

Turbo On means.. when your system is doing tasks it loads up cores.
In a non 980X situation.. ie like a 1156 platform, these guys get a +2 turbo on 2 cores, and a +1 turbo on all cores.

What that means is when a software is looking at only 2 cores, under load, you will get a nice +2 multi on only 2 of your cores.

If you run into a program which can use all 4 cores, then all your cores will get a boost of +1 under load.

The key thing is under load.

Now the 980X doesnt really follow that, because it just disables unused cores, and enables used cores.

The turbo on a 980X is +1... stock multi is 25.. with turbo its 26.
If you try to go higher windows 7 will not report the excess multi after 25.

Now the thing im getting confused is your telling me you want a turbo on to work for a higher value then whats the cpu itself is programed for.

That is called overclocking.
There are softwares which will ramp your OC on the fly, but as i said this is @ the board level, not the chip level.

Otherwise im wondering if u just mean this:

You see how they say Turbo Mode Control?
Well its not really turbo mode control, its a multiplier setting they called "turbo mode control". If i change those, my values will imediately change on the fly.

But its not a True Turbo on.

I run my system @ 4.2 24/7.
But i dont really care about the power draw since my gpu's probably gobble 4x the voltage on idle, then my cpu does.

I do care about my power consumption (though not to the extreme), i do have only one card - gtx460
I did not mean the Evga Eleet, no...
About Gulftown...AFAIK under load it will overclock all cores from 3,33 Ghz to 3,46 or overclock one core to 3,6 and disable remaining five cores....
based on the link i gave i thought with EE chips you have full control of the TURBO mode... so you can for example tell the chip in BIOS not to overclock all cores only to 3,46 but to whatever value you want....simply change 26x to 27x or 28x etc...
from the aforementioned link:
"ll I7 processor can engage a turbo mode, which allows the the processor to be over clocked dynamically by up-ing the CPU ratio by 1 - 2 x 133 Mhz (base clock) within a TDP of 130W. With the 965 which has an unlocked ratio and with a supporting motherboard, the ratio increase and TDP limits can be decided by the user.
This means instead of a max increase of 266 Mhz in turbo mode, the increase could be anything, 400mhz, 533mhz, etc. And it would be applied only when needed."

Anyway, reading through other posts, the things seem to be more complicated that i thought...i wanted to avoid the bclk overclocking because of RAM and other stuff, which can be influenced with it...
and i did not know you cant set voltage to default value (instead of Auto, i planned to do this) when C1E is on...i probably give up for the moment and will do more research on the topic

Thank you all for your answers

 

[coffeejunkee]

"and with a supporting motherboard"

That sounds important.

"and i did not know you cant set voltage to default value (instead of Auto, i planned to do this) when C1E is on..."

Hmm, I dont understand what you mean...setting voltage and C1E has nothing to do with each other, at least not on my Gigabyte mobo.
There are 3 ways of setting voltage, none of them depend on C1E:

- auto setting: works fine at stock freq., starts overvolting as your mobo sees fit when you up the bclk, usually more than necessary. Multiplier and voltage lowered in idle when EIST is enabled. To make this clear once more: auto does not mean stock.
- fixed value chosen from a list or keyed in, vcore remains the same under idle and load. Only multiplier is lowered in idle, vcore stays the same when EIST is enabled.
- normal setting: mobo uses default vcore for your chip no matter what bclk or multiplier you set. Multiplier and voltage lowered in idle when EIST is enabled. Use offset values to increase or decrease vcore.

I can choose to use C-states and C1E regardless of the way I set my voltage. Also, C-states are not responsible for lowering voltage or multiplier. This is solely controlled by EIST. C-States are necessary for Turbo though.
Furthermore, vdroop and vdrop has nothing to do with this. There will be drop and droop no matter which way of voltage setting you use. If you enable Load Line Calibration there will still be drop but no (or very little) droop.

 

[Timmah!]

"and with a supporting motherboard"

That sounds important.

"and i did not know you cant set voltage to default value (instead of Auto, i planned to do this) when C1E is on..."

Hmm, I dont understand what you mean...setting voltage and C1E has nothing to do with each other, at least not on my Gigabyte mobo.
There are 3 ways of setting voltage, none of them depend on C1E:

- auto setting: works fine at stock freq., starts overvolting as your mobo sees fit when you up the bclk, usually more than necessary. Multiplier and voltage lowered in idle when EIST is enabled. To make this clear once more: auto does not mean stock.
- fixed value chosen from a list or keyed in, vcore remains the same under idle and load. Only multiplier is lowered in idle, vcore stays the same when EIST is enabled.
- normal setting: mobo uses default vcore for your chip no matter what bclk or multiplier you set. Multiplier and voltage lowered in idle when EIST is enabled. Use offset values to increase or decrease vcore.

I can choose to use C-states and C1E regardless of the way I set my voltage. Also, C-states are not responsible for lowering voltage or multiplier. This is solely controlled by EIST. C-States are necessary for Turbo though.
Furthermore, vdroop and vdrop has nothing to do with this. There will be drop and droop no matter which way of voltage setting you use. If you enable Load Line Calibration there will still be drop but no (or very little) droop.

Hopefully the Gigabyte´s second most expensive board does support it

Regarding voltage and C1E, i was merely reacting to JAG87´s post (post nr.15), precisely this sentence: "Unfortunately you need vcore set to Auto if you want your C1E voltages to work."
so now i am bit confused...what is the difference between C1E and EIST again?


anyway you say if i set vcore to normal, it wont rise even if i do some overclocking? But i can still let the saving features ON and vcore will decrease alongside multiplier?

 

[coffeejunkee]

Hopefully the Gigabyte´s second most expensive board does support it

One would be inclined to think so except so far I have only seen this functionality on Asus mobo's in combination with the i7 875k. But it could also mean I need to look around better. Or Gigabyte will add functionality by means of bios updates.

Regarding voltage and C1E, i was merely reacting to JAG87´s post (post nr.15), precisely this sentence: "Unfortunately you need vcore set to Auto if you want your C1E voltages to work."
so now i am bit confused...what is the difference between C1E and EIST again?

EIST = Enhanced Intel SpeedStep. This is what lowers voltage and freq. when idle.
C1E = sleepstate for cpu cores. This is what turns cores off when idle. There are more sleepstates, C3/C6/C7, which refer to how 'deep' the sleepstate is. You want to leave all these enabled which will cause no problems with modest overclocks.
Like I mentioned I have to turn off C3/C6/C7 when I go beyond bclk 180 or Windows will crash on boot. C1E causes far less stability issues.

Why I think JAG87 mentioned that is because not all motherboards support the 'normal' vcore setting. In that case one probably has to use fixed vcore and C1E wouldnt make much sense in that situation. Not sure what he means exactly by 'C1E voltages' though.

anyway you say if i set vcore to normal, it wont rise even if i do some overclocking? But i can still let the saving features ON and vcore will decrease alongside multiplier?

That is correct. And like I mentioned before, if you do want to increase the vcore, use the 'normal' setting in combination with an offset value you choose from the dynamic vcore list. (this works great for undervolting as well, i can shave off almost 0.1V without any stability issues)

Edit: sorry I have to correct myself here. I've done a little more testing and it appears that either C1E, C3/C6/C7 states and EIST are responsible for lowering voltage in idle. Or in other words, whenever you enable one of these features, vcore will be lowered in idle. Only when EIST is enabled will the multiplier drop as well. My main point still stands though, this happens only when you dont use a fixed vcore. Whenever you do use fixed vcore there will be no voltage lowering in idle, regardless of what powersaving features you enable or disable. JAG87's statement makes perfect sense to me now as well.

Also see: http://download.intel.com/design/processor/datashts/323252.pdf, page 89-93

 

[JAG87]

EIST = Enhanced Intel SpeedStep. This is what lowers voltage and freq. when idle.
C1E = sleepstate for cpu cores. This is what turns cores off when idle. There are more sleepstates, C3/C6/C7, which refer to how 'deep' the sleepstate is. You want to leave all these enabled which will cause no problems with modest overclocks.
Like I mentioned I have to turn off C3/C6/C7 when I go beyond bclk 180 or Windows will crash on boot. C1E causes far less stability issues.

Why I think JAG87 mentioned that is because not all motherboards support the 'normal' vcore setting. In that case one probably has to use fixed vcore and C1E wouldnt make much sense in that situation. Not sure what he means exactly by 'C1E voltages' though.

This isn't entirely correct. EIST or Speedstep allows the processor to change both it's clock and voltage based on the load, on how much work the cpu is doing. It has nothing to do with idling. It will change the multiplier to any number between 12 and the max, and modify the voltage according to the VID table. This wrecks an overclock done with BCLK, because every clock will be different now, so you can't abide to the VID table anymore. But it can still be used if you OC by multiplier, although I don't see much point in this technology to be honest. It's been shown that you actually save power if you run your processor at full speed even at small load percentage, because the task finishes faster.

C1E, or enhanced halt state, only kicks in when the OS sends the halt state, which means there must be no instructions sent at all. C1E also refers to the VID table to lower both the multiplier to 12x and the voltage accordingly. C1E is the only state you see while your computer is on. C2 and C3 states are stand-by states if I'm not mistaken, C4 is hybernation, and anything further than that is complete shutdown.

EIST and C1E are completely independent from each other. Both have a hard time when you overclock by BCLK (but EIST is a lot worse than C1E) because every multiplier will now give a different clock speed then what the VID table expects.

And yes, the normal setting that your gigabyte board has is unique and very useful, because it allows you really drive up your multiplier to the edge of stability without worrying about automatic over voltage. Most boards have only auto or fixed, at which point you might as well turn C1E off because you ain't saving that much power if the voltage doesn't go down.

 

[Elganja]

This isn't entirely correct. EIST or Speedstep allows the processor to change both it's clock and voltage based on the load, on how much work the cpu is doing. It has nothing to do with idling. It will change the multiplier to any number between 12 and the max, and modify the voltage according to the VID table. This wrecks an overclock done with BCLK, because every clock will be different now, so you can't abide to the VID table anymore. But it can still be used if you OC by multiplier, although I don't see much point in this technology to be honest. It's been shown that you actually save power if you run your processor at full speed even at small load percentage, because the task finishes faster.

C1E, or enhanced halt state, only kicks in when the OS sends the halt state, which means there must be no instructions sent at all. C1E also refers to the VID table to lower both the multiplier to 12x and the voltage accordingly. C1E is the only state you see while your computer is on. C2 and C3 states are stand-by states if I'm not mistaken, C4 is hybernation, and anything further than that is complete shutdown.

EIST and C1E are completely independent from each other. Both have a hard time when you overclock by BCLK (but EIST is a lot worse than C1E) because every multiplier will now give a different clock speed then what the VID table expects.

And yes, the normal setting that your gigabyte board has is unique and very useful, because it allows you really drive up your multiplier to the edge of stability without worrying about automatic over voltage. Most boards have only auto or fixed, at which point you might as well turn C1E off because you ain't saving that much power if the voltage doesn't go down.

both you and someone else (aigo?) claims this, yet I have had ZERO issues leaving EIST and C1E on while overclocked @ 20x200 (so lower multiplier yet higher blck). my computer constantly goes to 12x ~1.07-1.12 to 20x 1.28-1.32 with no issues at all (1.325 CPU Voltage)... I do have Vdroop enabled, HT on, Turbo disabled. You can see the complete details clicking on the link in my sig

so your information is not entirely correct...

 

[MJinZ]

No problemo with any settings (Speedstep, E1ST whatever) at 3.8-4.2ghz. Classified 760, 920, Megahalems.

 

[aigomorla]

both you and someone else (aigo?) claims this, yet I have had ZERO issues leaving EIST and C1E on while overclocked @ 20x200 (so lower multiplier yet higher blck). my computer constantly goes to 12x ~1.07-1.12 to 20x 1.28-1.32 with no issues at all (1.325 CPU Voltage)... I do have Vdroop enabled, HT on, Turbo disabled. You can see the complete details clicking on the link in my sig

so your information is not entirely correct...

didn't i also say this doesnt apply to everyone?

i said sometimes...

It really depends on what your low values are, and how well your cpu can downvolt / declock.

@ 200 blck with a 12x multi your @ 2.4ghz.
As jag explained, when you C1E kicks in, your voltage will be 1.07 in your model @ 2.4ghz.

If your cpu can handle this, then your fine, but ive seen really crap cpu's which couldnt do this.

Not to mention if your running 6 sticks of DDR3, your VTT needs to be scaled with it for the IMC.

So theres a TON of values which u need to hit to make sure C1E works.
And on some processors, you will be SOL.

 

[Elganja]

didn't i also say this doesnt apply to everyone?

i said sometimes...

It really depends on what your low values are, and how well your cpu can downvolt / declock.

@ 200 blck with a 12x multi your @ 2.4ghz.
As jag explained, when you C1E kicks in, your voltage will be 1.07 in your model @ 2.4ghz.

If your cpu can handle this, then your fine, but ive seen really crap cpu's which couldnt do this.

Not to mention if your running 6 sticks of DDR3, your VTT needs to be scaled with it for the IMC.

So theres a TON of values which u need to hit to make sure C1E works.
And on some processors, you will be SOL.

that's the answer you should have given a while ago :thumbsup: