Hello !

I tried a lot of things with my i7 920 and EX58-UD5 but it seems I can't boot (the screen never turns on) with BCLK >= 187.

Here are my settings for 20*186 (ok), but 20*187 fails (19*187 too).

QPI x36
Uncore x14
RAM x8
8 8 8 21 1T
LLC : On
VCore : 1,4v
QPI/VTT : 1.36v
IOH : 1.2v
DRAM : 1.64v
QPI PLL : 1.2v
ICH Core : 1.2v
CPU PLL : 1.88v

I tried even higher voltage but it just does not turn the screen on. The only way I found is to set QPI on Slow Mode... Do you think I should try a different setting for something ? Or test something ? I would like to know if the CPU or the Motherboard is the problem...


At the moment, my 24/24 OC is 21*181 (=3.8Ghz) with VCore 1.375v, QPI/VTT 1.34v, Uncore *18 and RAM*8. I already tested my Ram @800Mhz 8 8 8 21 1T 1.64v so I don't think it is the problem.
BIOS : F5g (same thing with F5C or F4e)

Thanks for any advice