Gigabyte EX58-UD5/Extreme Discussion Thread

[Alcibiades]

GAR if overclock still fails, the following setting could solve it.
##Channel A/B/C Misc Timing Control##
Round Trip Latency 58 [AUTO] manually put in for channels A,B,C : 62, 64, 66 respectively (very important setting, if too low will not boot)

What about dropping "Turbo Performance" mode down to Standard? This has given me much more stability pushing 3gb to their max, but it may translate over to large capacity/lower clocks.

I overlooked this, when having problems overclocking system, this should be one of the first things one does. Thanks for pointing that out honourable ReverendMaynard
Also nothing helps more than extra qpi/vtt.

Subtimings vary with different Sticks, if you have OCZ sticks subtimings look different from Corasair or Geil sticks.
Thats why i have said they are "worthless".

Hornet may well be right about the timings being useless, but maybe not.
That's why I would write down and post what my ram timings are at 1600Mhz using 133 bclk.
Can you do 1600Mhz @ 133 BCLK with 12GB?

I was just thinking if you can't go past 140 bclk and your running 12GB at 1400Mhz
then you can't hit 144 bclk and do 1440Mhz, right???
So you are probably better off trying 175 bclk NOT 180 bclk.
Why? 180 @ 8x gives you 1440Mhz which you haven't achieved yet with 12Gb's
175 @ 8x gives you 1400Mhz which you know you can do.

If still no go, then you should try 166 BCLK with an 8x mem multi and uncore 16x for 1333Mhz to see if that works.
Make sure you manually change all the timings, but keep them at the 1600Mhz C9 timings for now.
Don't worry about losing Mhz you can still tighten timings to get close to comparable performance, especially with higher BLCK.