i5 750 3.2

[rs11]

Hello ,

Im new to overclocking been looking around at guides etc. However still confused!

my spec :

I5-750 processor 2.66ghz 8mb cache
Asus P7P77M DDR3 motherboard
Intel core i5/i7 standard cooling

I brought a ac freezer pro 7 rev2 yesterday and fitted.

I want to overclock my i5 to 3.2 to see if it helps in gaming so i tried Multi - 21 and BLCK 153. Ran prime95 passed all however temps were around 70c!?

simple step by step for easy 3.2 o/c would be great

Thanks help in advance

 

[cubeless]

sounds like you got it... don't mess with the multi you will still be able to get turbo... 70c is about normal for those things...

you ought to be able to just walk the bclk up to 160 with the multi on default... you may need to push the voltage on the cpu up a click or two, but be sure your temps don't take off...

 

[rs11]

thanks for reply , im unsure on all the voltages , like what i should use etc ? and i will put the multi back to auto?

 

[perdomot]

Most of the reviews I've seen say to raise the vcore to 1.4 and you can get to 4Ghz easily.

 

[Kenmitch]

Seems like your temps are on the high side for 3.2ghz and aftermarket cooler. You need to lock down your voltages. Then stress test the CPU for stability. I always start my stress testing with Intel Burn Test as it'll error out very quickly and helps find a good starting point for the base voltages.

While on my i5 750 adventure I didn't play around with such a small overclock as your goal. But if it'll get you started out I'll give you the data from the mildest overclock I tried.

I run with SpeedStep, C1E, and Turbo mode enabled (to get 21x) C-State is disabled to kill the 22-24x single, dual core X's. I figure I'll run my chip the way Intel designed it to run with multiple speeds and voltages....Just the overall speed is out of spec.

3.36ghz(21x 160) using the following settings in bios.

Vcore 1.1875v (w/vdrop)
CPU VTT 1.050v
CPU PLL 1.675v
PCH 1.050v
Memory just set to stock voltage or maybe up it a little. Mine is 1.50v rated but used 1.54v

Of course all CPU's are not created equally. You'll need to play around with yours to find it's personality I'll call it. Highest I've booted into Win7 with mine is 4.597ghz for the screenshot

 

[rs11]

excellent help thanks all clear apart from Vcore where is that in bios i have Vcore over voltage max 0.63 min 0.01 in bios obviously that is not Vcore.

Thanks.

 

[Kenmitch]

excellent help thanks all clear apart from Vcore where is that in bios i have Vcore over voltage max 0.63 min 0.01 in bios obviously that is not Vcore.

Thanks.

What MB do you have? I think you did a typo on your first post.

The setting you see may be the one to use. My evga just shows it as vcore voltage. But when viewing my voltages in evga elite it shows it as +0.???? whatever voltages.

 

[rs11]

MB- Asus P7P55-M.

Then in bios says Vcore over voltage "auto" or between 0.01 to 0.63.

 

[brencat]

Hi OP. Overclocking Lynnfield is a bit different then with past chips due. The key to successful OCs with low temps on these chips is to use the minimal amount of extra vcore after you've got the mem controller voltage (QPI/VTT) set correctly.

1. Find max stable Bclk - only voltage to raise is QPI/VTT (don't use more than 1.3v for 24/7)
2. Find stable mem speed - set timings and vDIMM manually per RAM spec, taking care to watch RAM multi
3. Find max CPU speed - this is where you raise vcore.

Set your QPI multiplier to 16 (32 on Gigabyte boards), not 18 (36), and adjust RAM muliplier (6, 8, or 10) based on final speed of Bclk you reach to get you as close to spec as possible.

QPI/VTT voltage is the key to everything! Vcore is one of the last things you should touch. Look at my sig... 3.8ghz with only 1.12 vcore, but I'm using 1.25v QPI/VTT (up from 1.15v stock). I'm also using Load line calibration + EIST (but C1E and other C-states are disabled).

My system is rock stable...100 passes Linpack (max RAM), 3hrs OCCT (high data set), and 14 hrs Prime95 stable. Load temps are ~ 62-60-59-59, and +6c to each of those under Linpack....all using my 92mm Xigmatek cooler. Gaming never gets above 56c (BFBC2).

Follow this guide step by step...it explains my approach perfectly:

http://www.techreaction.net/2010/09/07/3-step-overclocking-guide-lynnfield/2/

 

[rs11]

Just took a look in the bios i only have CPU PLL there and not CPU VTT?

Also CPU PLL would not let me enter 1.675v as the min is 1.8v

My RAM is DDR3 - 4gb and is 666mhz on CPU-z how would this setup in bios?
Thanks for advice people.

 

[Kenmitch]

Just took a look in the bios i only have CPU PLL there and not CPU VTT?

Also CPU PLL would not let me enter 1.675v as the min is 1.8v

My RAM is DDR3 - 4gb and is 666mhz on CPU-z how would this setup in bios?
Thanks for advice people.

Found this review of your MB that may be of some help to you. It also may help others to help you as it has some nice screenshots of your bios options.

Your CPU VTT should be the one that is labled IMC Voltage

CPU PLL just set to 1.80v if it's the lowest allowed voltage.

Vcore over voltage will controll the vcore. This will add voltage based on what Intel hard coded into the chip. Maybe start with +.001 and see what it boots with. Just go back into bios and see.

Make sure you drop the memory down closest to spec speeds. DDR3-1333 is what your after.

Start playing around and see what happens.

 

[rs11]

Thanks for that very helpful I know what Im looking for now

 

[rs11]

This seems ok just overclocked it to 3.2 get max 67c on intel burn on max test so is this ok?

I will run Prime to make sure

 

[Kenmitch]

This seems ok just overclocked it to 3.2 get max 67c on intel burn on max test so is this ok?

I will run Prime to make sure

Seems OK how are your voltages?

I'm water cooled so your temps are around what mine are at 4.2ghz

 

[rs11]

Voltages - CPU Vcore - 1.23
VIN1 - 1.74
+3.3v - 3.38
+5 - 5.06
+12 - 11.60
VIN6 - 0.60
got these voltages from hw monitor

Ill probably invest into a much better cooler eventually for higher but for now seems ok

 

[rs11]

Ran prime for 8 hours no errors also occt 2 hours no errors. CPU temp is around 50c on full load is that ok?

Also i get EPU cannot launch under the current o/c settings please restart load defualts. I have never used this program so is it ok to ignore it?

Thanks

 

[Kenmitch]

EPU ??? Program that came with MB for power saving? If so I doubt it would work when overclocking. Haven't used it so wouldn't know for sure.

If your temps are that low you could bump your overclock up some more if wanted.

 

[rs11]

Yeah just found that all EPU does is save power not bothered about it. I may try o/c abit more now i know how to test etc

 

[rs11]

Just used 180 BLCK - IMC - 1.14 and PCH 1.10 PLL-1.80

But the only part im unsure about is DRAM frequency it has not got 1333mhz anymore had one 1400 ish and 1600ish

So im not sure the freq for the ram

Any help will be great as always

 

[Kenmitch]

Just used 180 BLCK - IMC - 1.14 and PCH 1.10 PLL-1.80

But the only part im unsure about is DRAM frequency it has not got 1333mhz anymore had one 1400 ish and 1600ish

So im not sure the freq for the ram

Any help will be great as always

Your ram might work around 1400 or so. Might have to play with timings or bump voltage a little.

 

[rs11]

Ok ill just trial and error , thanks for all your help I wouldn't have a clue with out it

 

[brencat]

Just used 180 BLCK - IMC - 1.14 and PCH 1.10 PLL-1.80

But the only part im unsure about is DRAM frequency it has not got 1333mhz anymore had one 1400 ish and 1600ish

So im not sure the freq for the ram

Any help will be great as always

rs11, you really need to read that OCing guide I linked in my earlier post, as you appear to be changing stuff willy nilly and I'm not entirely convinced you understand how all the pieces fit together:

http://www.techreaction.net/2010/09/07/3-step-overclocking-guide-lynnfield/2/

Bclk x DRAM muliplier = DDR3 frequency, so as you raise the Bclk you might end up OCing your RAM beyond spec without even realizing it, depending on what DRAM multiplier you've chosen.

 

[rs11]

Ok will read it through more