Core i7/X58 Overclocking Thread

[D3mon_Hunt3r]

I concur...

I went and returned my 965 and exchanged it for a 920.
My max stable oc on the 965 was 4.3 and guess what my max stable oc on the 920 is... Give up?

4.3

Guess for me the 965 was just a waste of money since I can do the exact same thing with my 920. With the exact same volts by the way.
All I know is 4.3 for $320 is WAY better than 4.3 for $1150. Seriously

And my ram, qpi and uncore speeds are almost identical to what they were on my 965 4.3 overclock.
So lost 200 pts on everest read, write and copy but I put $700 back in my pocket...
no brainer, huh?

Anyway, it's funny how context is so important. I was really dissapointed in a 4.3 clock on the 965 but I'm thrilled with the same clock on the 920

And you put in context too that you can't seem to use memory @ a frequency much then 1600, because after that you'll have to sacrifice CPU OC in order to get more mem speed. And because with high qpi speed and uncore speed 920 don't seem to get stable, you most likely won't hit ddr2000.
But for what you said, you are indeed correct.

[Splave]

And you put in context too that you can't seem to use memory @ a frequency much then 1600, because after that you'll have to sacrifice CPU OC in order to get more mem speed. And because with high qpi speed and uncore speed 920 don't seem to get stable, you most likely won't hit ddr2000.
But for what you said, you are indeed correct.

I cant imagine having a problem running 2000mhz ram (although its pointless) 200bclk x10 ram multi gets you there. Am I missing something?

[Lukee]

I cant imagine having a problem running 2000mhz ram (although its pointless) 200bclk x10 ram multi gets you there. Am I missing something?

This is an exerpt from Dejanh's post.

1. Why is it that I cannot run my 2000MHz memory in my new Core i7 system?

To understand this note the maximum QPI link speed we mentioned earlier. Using the simple ratio we defined, we can see that with the maximum QPI link speed of 4.0GHz we can have a theoretical maximum Uncore of 4.0GHz and a maximum memory speed of 2.0GHz. These however are only theoretical maximums and are by no means guaranteed. For starters, QPI and Uncore cannot be run at the same speed as any clock oscillations can result in a crash if the ratio of QPI to Uncore ever falls below 1:1. Therefore, Uncore must always be below QPI to avoid this, and preferably below the 8:9 Uncore to QPI ratio to guarantee stability. Consequently, if we cannot achieve 4.0GHz Uncore, this means that we absolutely cannot achieve 2.0GHz memory and we can therefore not guarantee any stability for 2.0GHz memory. Technically, the maximum DRAM speed for a stable system is equal to ((Max. Uncore) / (Safe QPI:Uncore Ratio)) / 2 or (4.0GHz / 9:8) / 2 = 1.777GHz. In between 1.777GHz DRAM and 2.0GHz DRAM you are likely to experience some level of instability over the long term. Past 2.0GHz you are just plain lucky.