pasty i'd be very interested to see all of ur settings including what's disabled + enabled even if u only get 2 hrs stable at 4.2. Can you upload some pictures? (saves u typing it all out). BIOSes are almost all the same on these P5Qs so will be transferable.Looks very nice, i always thought that manual CPU GTL tweaking was important with theese chips, particularly above 450fsb, only ever ran mine at 8.5x450 before i sold the kit, always regret not trying to push it a bit higher and keeping it as a second rig, chip was a nice low 1.200 vid EO stepping. 4.2ghz is very impressive, looks like a very nice cpu.Still going at 4.2Ghz. Looking good so far.
CPU GTL Ref, AI Clock Twister, AI transaction Booster, CPU & NB Clock Skews, Load Line Calibration are all on Auto.

I knew there was a reason i stuck my rad in a box on the windowsill. 120x38mm Yate Loons are only running at 900rpm as well. This is a excellent board. I did'nt expect this much out of it, especially given the low voltages. All of my older boards, Asus P5E X38, DFI LT X48 T2R and the hopeless MSI P45 Platinum needed loads more voltage to get the board stable even with a 45nm dual core.Good luck with the next 4.2 attempt mate, i hope you get there, i kinda wonder now wether it was worth "upgrading" from a 3.8ghz q9550 to i7, the only real benefit i got from i7 was sli and a very easy 4ghz.Failed on error just before 9 last night. That was almost 13 hours of Prime so it's almost stable. Just need's a little tweaking of something. Overnight i let Prime run with the cpu at 4Ghz and have just stopped it so it's had 15.5 hours and is rock solid at the settings i posted further up. Going to flash to the Mbios at the weekend and retry that 4.2Ghz. It passes 20 runs of linx but with it failing Prime on a error it's going to be niggling at me if i don't sort it.