G0 Steppings work well with this board also!
I too have spent the last few weeks reading all "245+" pages of this massive thread. The info here is invaluable and could almost be consolidated into some sort of Overclocking white paper or technical journal on the Asus P5W. My system is as follows (approx 5 weeks old):
Asus P5W Deluxe
Intel q6600 quad core G0 Stepping (boxed August 19, 2007)
Thermalright 120-Ultra Heat Sink and 120mm Antec TriCool fan
4GB Ballistic memory
ATI Radeon 2900xt
WD 150gb Raptor
Antec p182 case
Running Windows XP w/ all updates installed
With that said, I received a 1.04g revision of this board from ebuyer, and the BIOS on it was 1901. I installed a Intel Q6600 quad core cpu, and it recognized it immediately with no issues. I do get the incorrect CPUcode at bootup, but everything still works fine.
I read throught all pages on this forum before I attempted overclocking. Disabling everything I didnt need, I'm able to get up to 3.2ghz (fsb 1422, bus 355 ) with no problems. The system remains rock solid at this OC and I can run 20+ hour loops of Prime taxing all CPU's without a lockup. Half Life 2 Lost Coast Stress test can run for hours also with no issue.
I've had to adjust my MCH voltage to 1.65v, Mem voltage to 2.2v a FSB voltage of 1.4v and a CPU voltage to 1.4v also. PCI Express freq is at 110. Memory timings are at SPD.
Running Prime for a few hours, CPU 0&1 reach about 55C, while CPU 2&3 reach about 51C.
This is all on air colling only. I can get the system to boot and go into Windows at 3.4ghz (bus speed 378 x 9 multiplier) and remain stable with Prime for 20+ hours also taxing all 4 cpu's. Temperatures go up ofcourse, with CPU's 0&1 reaching 59C and 2&3 reaching 55C after several hours.
I can not run 3D games at this setting though. Half Life 2 or Bioshock will launch, but after 2-3 minutes, the game crashes and I get some sort of ati.dll error and thrown back to windows, or a hard lock will take place and the system will reboot.
Can anyone recommend some settings to adjust to try and get the videocard stable at these settings? Obviously the CPU has no problems at this OC, but the videocard doesnt want to make the leap from 3.2 to 3.4ghz it seems. Would increasing voltages in certain areas help this?
All in all, I love this board and CPU!! I'm amazed how much the G0 stepping allows me to overclock and temperatures remain very low. I was a bit leary initialy reading other peoples problems getting the G0 to overclock with this board though. I'm not sure if its the combined factor of having the latest rev board, or still using the 1901 BIOS, or possibly getting lucky with a good yield on all the pivotal components I've place in the system so far? But I'm amazed that an off the shelf quad core CPU could go from 2.4ghz to 3.4ghz so easily?
I'm confident I can get the videocard stable somehow at 3.4ghz, I'm just not sure what to adjust at this point voltage wise?
Cheers!
-Chris
Edit: An added note:
I originally had a second ATI 2900xt in crossfire configuration. I could not get the system stable in 3D games at anything above 3.0ghz (and even then, games after a few hours would crash, getting ati.dll errors). The performance of Crossfire also was dodgy at best with some games, so I returned one of the Radeon boards. Using only one Radeon card, I was then able to get up to 3.2ghz rock stable running anything. Clearly, running in Crossfire configuration seems to limit the potentials of Overclocking in some way?