How to overclock your Nehalem (Core i7)

[Martimus]

Originally posted by: aigomorla

Originally posted by: jaredpace
10-4

Thread: Core i7/x58 Overclocking Thread View Single Post
Today, 05:08 AM #67
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Posts: 1,370 On all of my 5 boards is multi with Turbo mode on i920 only 21, 22 multi screen must be FAKE





that looks like today to me.

You realize that 10-4 means that he is acknowledging you right? It wasn't a reference at the date. It is synonymous with affirmative, or ok.

 

[Tempered81]

Yah affirmative

 

[Idontcare]

Originally posted by: Martimus
You realize that 10-4 means that he is acknowledging you right? It wasn't a reference at the date. It is synonymous with affirmative, or ok.

Roger that

 

[harpoon84]

Copy that.

 

[aigomorla]

Originally posted by: jaredpace
Yah affirmative

OOOOOOOOOOOOOOOPS

I appologize.

ROFL

thought you ment post day 10-4.

Sorry jared!

 

[sunnn]

there's no nda to show oclock i7 and superpi test results, but there's nda when it comes to gaming tests hmmm.

 

[Dadofamunky]

"Uncore." Sheesh. If that's true there are some WAY overpaid marketing types at Intel. WTF?

This is cool, though. Nice to see what we can expect. Hey, the 3rd's tomorrow! I guess we can expect a flood of new info.

But make sure to go out and vote!

 

[Shmee]

I heard that at high clocks, it is more stable to have a mulit of 19 vs 20, and instead just up the QPI more, b/c 920's like odd multis. is this true?

EDIT: I think this should be stickied.

 

[aigomorla]

This is so old..

we have new rules we discovered.

This follows the original set of rules which was adopted on the fly after we migrated out of the original C2Q arch.

First off, uncore is the magic key in overclocking in speed.
The higher your unicore is, the faster the cpu is.

To get a faster unicore you need a higher bclk.

So having a higher bclk will net a greater overclocking benifit then just raising your multi.

Now it seems like the higher bclk you go, i7's like odd multi's.
Dont ask me why... ive seen enough of this on my end to say its true, and enough on my friends ends to say its confirmed.

High bclk = 170+

170+ is also where a magic number happens with gulftown, for those of you who are on gulftown. They get substantially faster.

Lastly 32nm is fragile.. becareful with them, and a i7 860 is not a 920.
The LGA1156 platform has its balls held by intel because of a major limited VTT, while the i7's have a open pasture with its VTT up to 1.35 not 1.45... (thats water territory... also a nice way to kill 32nm)

Last... VTT and Vcore work against each other.
So more VTT = less vcore, and vice versa.

 

[OILFIELDTRASH]

I've never heard the vtt works against vcore. Vtt is qpi voltage right? You should make a oc'ing guide cause I'd like to get my 930 to 4.0ghz

 

[aigomorla]

I've never heard the vtt works against vcore. Vtt is qpi voltage right? You should make a oc'ing guide cause I'd like to get my 930 to 4.0ghz

VTT is the QPI.

VTT is what i was called when we had FSB's.

And then it was called a FSB Termination Voltage.

This is why on the i7 860 u need tons of vcore because your limited to a very low VTT vs a i7 920 which require lower vcores at same clock because they have a higher VTT.

And no im done with guides.. :X
Guides = maintaince = lots of time because of lots of PMs.

Id rather only get pm'd advance questions where i know i will probably give the best advice (example VTT), then answer everyone's pm when they ask a simple question like what is vcore.

 

[OCGuy]

FYI this goes for Westmere too. Nehalem is 45nm.

 

[Toadster]

gonna try the 980X

 

[Shmee]

has anyone mentioned the difference between uncore requirements for bloomsfield and gulftown? I heard somewhere that the gulftown only requires uncore be 1.5x the memory ratio, while with the bloomsfields it was 2x.

Also, are there any official specs from intel on maximum VTT and Vcore on the 980x?

 

[jimmyparky]

Is it really same for Westmere?

 

[miahallen]

Hey guys, I wrote a newer guide that includes steps for the newer 32nm CPUs...check the link in my sig

 

[gusther]

I just bought 3 packs of Super Talent 2000 mhz memory and QPI-dram in xmp rises to 1.6V.
Is marked very dark red.
Is that ok !!!
I have a core i7 920 without overclock.
i was looking around and I could not find anyone who knew anything or were very specific.

 

[Shmee]

if you mean the VDIMM, then that should be fine. If it is the QPI VTT or w/e, yes, that is bad. Keep under 1.4. Best if under 1.35.

 

[gusther]

Is the same as QPI-VTT. The issue is that is working as it should but does not work. Memory allows, the board allows it, the CPU allows,
but the three do not go together

 

[Shmee]

well NO. you need to set it manually to less than 1.35, or risk killing the memory controller on your CPU.

1.4 at max, shouldn't need this much though just for a high memory frequency without OC.

 

[gusther]

there is a specification by Intel on the maximum allowable voltage ?
If preserved under the QPI-dram voltages less than 1.5 the machine do not start and with 1.5v the machine after awhile crash.

 

[Suspicious-Teach8788]

QPI should be under 1.35 supposedly according to Intel. But I believe you can go a lot higher.

I'm really irresponsible when it comes to this, and so I lost all my bookmarks (grr for organization) on this, but I did research on Patriot, Corsair, and G-Skill forums. The new chips that claim like DDR3-2000 9-9-9 (they're mostly $200 for 6gb sets.. so performance, but not extreme performance chips), are they Elpida BBSEs or something? I'm not sure... but they seem to require higher QPI voltages.

I have seen recommendations up to 1.68v on Patriot's forum. The G-skill guy recommended 1.6 for me. I can't even tell you what I run at because I already forgot, but I tried sticking to the 1.35 rule for the lognest time and I almost RMAed 2 sets thinking they all suck. Then I went to like 1.45 or 1.47. I think I run around there. Wow. Flawless. To hit DDR-2000 though I need a little above 1.50 that's for sure.

Quite honestly QPI isn't what kills CPU. The early "omg my cpu is dying due to high voltages on my RAM" was VDimm. That's why they recommend 1.85v or so as your max. You can possibly push a little more, but anything more is a little dangerous. VDimm is the one you really want to be careful about. I was scared for the longest time about QPI, but many chips will NOT run properly if you stick to the 1.35 rule.

The reason the 1.35 rule was kinda out there was because of the whole "keep your QPI within 0.5 of your Vdimm." With a 1.85 max, 1.35 should be your QPI setting... I think that's how it came about...

Edit: Did a lot of digging to pad my bookmarks and references just in case people were wondering, but here's the link with a LOT of good information:

http://forums.tweaktown.com/gigabyte/33454-post-i7-core-temps-here-5.html#post312297

 

[bigboym]

Hello,

I did not want to start a thread for this question: I would just like to know if I could overclock my i7 930 with an intel stock cooler to 4GHz?

I am using an ASUS P6X58D-e motherboard with 2x TR3X6G1600C9 - 6GB (3x2GB) Corsair XMS3, DDR3 PC3-12800 (1600) Non-ECC Unbuffered, CAS 9-9-9-24, 1.65V memory kit.

Thank you!

 

[Gillbot]

Hello,

I did not want to start a thread for this question: I would just like to know if I could overclock my i7 930 with an intel stock cooler to 4GHz?

I am using an ASUS P6X58D-e motherboard with 2x TR3X6G1600C9 - 6GB (3x2GB) Corsair XMS3, DDR3 PC3-12800 (1600) Non-ECC Unbuffered, CAS 9-9-9-24, 1.65V memory kit.

Thank you!

Yes, but it's not advisable. I don't think that cooler could dissipate the amount of heat that will be generated.

 

[bigboym]

Could you recommend a good price/performance ratio cooler for the job? Keep in mind that the CPU will be under FULL load quite a lot because of my 3D renders. Thanks!