"ASUS P5Q Deluxe discussion".

[SirKeldon]

For the ram issues, you guys aware that the board overvolts already 0.08... also it's not because the rams did 1200mhz on other boards tht it will do this on P45... also thought that your rams could have degraded ? your settings are not correct, played with the skews ?

And like any new board it might be some child diseases that have to be solved... Time will tell...

Oh yes Leeghoofd, i know that the RAM overvolts 0.08, that's why i keep her at 2.12V on BIOS cause 2.20V is the voltage it's rated to do 1066 5-5-5-15-25, also the RAM is on the QVL ... and i highly doubt it's degraded cause it's just a week old and it's been active cooled

Amazingly, at this voltage, my RAM was also able to boot at 1130-1185 and 1200 so i kept trying. I was able to complete almost a pass of memory test and do some benches on windows with vRAM at 2.18V (2.26V real) for 1200Mhz and was fine, even on light tasks the system ran well ... but Prime95 Blend Mode or OCCT RAM Test failed within seconds, i tried to up some other voltages to +0.1V +0.2V but same error and sometimes even worst (wasn't booting to Windows). I also tried to play with the timings, setting tRFC to 55 and loosening some other ones, setting PL to 10-11 instead of 8 ... played with CPU GTL Ref Voltage, CPU Clock Skew and NB Clock Skew but no luck at all. It's always failing when i try to stabilize 500x8 with 1200Mhz on memory ... or even on my stable 445x9 when i try 1186Mhz.

What's more surprising to me is i'm 100% Prime95 Blend & F@H stable at 445x9 (4Ghz) with 1115Mhz (5-5-5-15-25 PL 8) with these tiny voltages (i had to up a notch for being F@H stable, on prime they were lower):

vRAM: 2.14V (2.22V measured with DMM)
vPLL: 1.52V (1.55V measured with DMM)
vFSB: 1.30V (1.22V measured with DMM)
vNB: 1.14V (1.17V measured with DMM)

The only skews i can't play with are the DRAM ones since i see it's only a BIOS feature for the Deluxe, maybe i was wrong trying things ... but i tried almost everything, jVIDIA also helped me to this but nothing did the trick, that's why makes me think it's a chipset and/or BIOS issue more than other thing (or maybe i'm still missing some setting, i don't rule out that since i'm still a noob on the OC world).

And yes, I know this is a so young board, and also, a younger chipset that has to be hard studied and implemented for the BIOS developer's and they're not machines, cause all the other things are working well but this, i'm patient but i'm affraid since it seems more a direct hardware issue related to P45 more than a BIOS fix. Maybe we'll have to wait for a 2nd revision of the chipset? I really hope not and still hoping a bios will fix that cause really ... i don't want to buy another board now