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RAM for OCing i5 760 - Page 3

post #21 of 29
Glad to hear it is working good for you. thumb.gif

Yeah run a prime95 for a bit, I wanna see what it does maxed out... I'm guessin mid 40's-50 under full load.

What were your old temp numbers?
Edited by gtfoxy - 2/23/12 at 2:56pm
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post #22 of 29
Thread Starter 
I've OC'd to 3.8GHz (20 x 190) at 1.25v. The only way i could get to 4GHz and stay stable was to pump more than 1.32v into the CPU which i didnt want to do, guess i didn't get the best chip. Temps are pretty good still at 3.8GHz, the max temperature i saw during prime95 was 59C and during gaming it barely reaches high 40s. Can't remember temps with the stock cooler, but i had normal temps that you'd expect plus a few more degrees because of dust. I don't think i will be needing another fan on the radiator, this cooler is performing very well smile.gif
post #23 of 29
I was curious. I had an i7-860 that I had in this tower. I tried a coolermaster and the 620. Stock the Coolermaster cooler idled about 22C, the 620 was between 17-19C. Maxed, about the same difference, 2-4C less.

Very good.That sounds about right. Your temps will also take a big jump the closer to 4Ghz and above. 1.32 is not that bad, bout the same here at that frequency. Ijust got what I am hoping will be a stable 4.16Ghz. Finally got it stable i think, after a few tries, and it took 1.4Vidle/1.32Vload. I'm about to run some benches and hop on some BF2 to test it out... Next goal, 4.25Ghz stable biggrin.gif

Also, work with your PLL and PCH voltages around 4Ghz, especialy if your bclk is over 185. Soemtimes you may think you need more Vcore, but it is not that, necessarily. Only way to know is to run the tests, making only one change at a time and monitoring improvements. I have been using IBT as of the last few days since I like how it spits out time and speeds. That is important because you can see if a change helped in processing power... time drops and rate picks up after a change & it didn't crash, you know the change worked to the better.

Vtt is real big when you go ripping it up with graphics. The extra bandwidth through the CPU and Memory require more Vtt, in my experience, so if you freeze in games, even if it is stable in Prime or IBT, try upping this. At a minumum I would set it at 1.3V to begin with. You may find 1.35V is more the number.. maybe more, depends on how hard you push the RAM and QPI.

In that tune are you running the RAM at 1140 or 1520Mhz? Voltage?

Also, try running some benches with different clock ratios. High bclck/low Multi seems to benefit games, so might want to try a 210/19 tune or something there abouts.



What is your max multiplier?
Edited by gtfoxy - 2/24/12 at 2:35am
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post #24 of 29
Thread Starter 
Thanks for the further info, i have played around with PLL and PCH voltages and i have seem to have found nice figures for both. VTT is at 1.23v i think and that was even good for 200mhz bclk, i have been using IBT and prime95. The RAM multiplier is set to 8x so the ram is running at 1520MHz, and ram voltage is set to auto and it seems not to go above 1.63v. I haven't been pushing the QPI much at all.

High bclck/ low multiplier seems to be what this chip wants. For example, when i did OC to 4GHz, 200 x 20 was much more stable than 191 x 21. I may try some different clock ratios, but as you said high clock/ low multi seems to benefit games and i agree. The maximum multiplier on this chip is 22x, but as i exited and saved the bios, it brought it back down to 21x with the same bclck, which isn't much of a problem anyway since the key to this OC i think is mastering the bclck.

hmm i thought anything over 200mhz bclck for this chip would be a bit high, but i guess i could try 210x19. I was finished this OC until i logged on and saw your last post tongue.gif I must have restarted my PC about 50 times during this OC lol, this is my first overclock if i didn't mention it earlier. 90% of what i know about overclocking now has been from actually doing it! and your help gtf0xy of course thumb.gif
post #25 of 29
Quote:
Originally Posted by Dom-inator View Post

Thanks for the further info, i have played around with PLL and PCH voltages and i have seem to have found nice figures for both. VTT is at 1.23v i think and that was even good for 200mhz bclk, i have been using IBT and prime95. The RAM multiplier is set to 8x so the ram is running at 1520MHz, and ram voltage is set to auto and it seems not to go above 1.63v. I haven't been pushing the QPI much at all.
High bclck/ low multiplier seems to be what this chip wants. For example, when i did OC to 4GHz, 200 x 20 was much more stable than 191 x 21. I may try some different clock ratios, but as you said high clock/ low multi seems to benefit games and i agree. The maximum multiplier on this chip is 22x, but as i exited and saved the bios, it brought it back down to 21x with the same bclck, which isn't much of a problem anyway since the key to this OC i think is mastering the bclck.
hmm i thought anything over 200mhz bclck for this chip would be a bit high, but i guess i could try 210x19. I was finished this OC until i logged on and saw your last post tongue.gif I must have restarted my PC about 50 times during this OC lol, this is my first overclock if i didn't mention it earlier. 90% of what i know about overclocking now has been from actually doing it! and your help gtf0xy of course thumb.gif

That is how you learn to do anything... Just do it.

Glad to offer what I can. By no means am I any where near as knowledgable as so many others on here but there aren't to many of us 1156 guys floating around anymore...

If there is other info out there regarding going over a specific bclk on that rpocessor then by all means research it thoroughly & use jurdance prudance as to the info. I have only played with the i7 1156, no i5's. I know the 760 doesn't have a igpu so I was looking at it more as a i7 without hyperthreading, which I have tested even to dual core OCing with and without hyperthreading, but I may be wrong in that assumption, but it is a quad core 45nm lynnfield... Personaly with my 860 went to 210bclk easily & my 870 to 217bclk was as high as I tried.

I looked at the two types of tunes from the perspective of efficiency. If you have two tunes, one at say 83watts combo vs a 95watt combo, the idle & load temps are about the same if not lower with a higher multiplier on less voltage for a lower overall frequency. Temp is the measurable loss, same temp, or less means better energy conversion for a given power package. To thos reasoning, & very little difference in benches for running the processor harder with a higher bclk.
Edited by gtfoxy - 2/24/12 at 5:45pm
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post #26 of 29
Thread Starter 
From what i have read, and as far as i'm concerned, the i5 760 is basically i7 8xx without HT. How did your OC go without HT on?
post #27 of 29
Temps drop a bit, didn't do a lot for stability considering the performance loss. It works out better running a lower cpu frequency with more RAM speed vs turning it off.

Going down to 2 cores can get you some much higher clocks, but any game that requires a lot of cpu power would be murder on the 2 core set-up but in games like BF, where much of the object mass is not near actual, so physics calcs are way lower, so the cpu requirements are much less. Notice that you can kick boxes & even fallen telephone poles out of your way while running, no physics calcs there, so fast frame rates...

You can give it a try. You have to start from scratch with each tune you do with the various options of cores & HT. Dual core is way cooler & way less voltage. If I remember correctly I stopped at around 4.3Ghz w/ dual core & HT on. I think I could nudge 4.4-4.5 stable with some tweaking.
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post #28 of 29
Thread Starter 
Quote:
Originally Posted by ****xy View Post

You have to start from scratch with each tune you do with the various options of cores & HT. Dual core is way cooler & way less voltage. If I remember correctly I stopped at around 4.3Ghz w/ dual core & HT on. I think I could nudge 4.4-4.5 stable with some tweaking.
I could try out of curiosity, but if i go down to 2 cores, thats also 2 threads since i5 does not support HT, and i need quad thread power for gaming lol
post #29 of 29
Yeah without HT, just two cores would loose quite a bit.
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