I recently upgraded my old processor (e6700) to a Q9550 on my Asus P5W DH Deluxe. Everything started fine until the windows welcome screen was about to pop up and I get a half second flash of a BSOD and the computer will restart.
Now, I removed 2gb of RAM and the computer will boot into windows and work fine running on the 2gb left.
Vista is fully up to date with SP1 so I don't know how the RAM issue has cropped up.
Would reinstalling windows be a solution or is something else required?
Burn a memtest86+ CD and test all the sticks together. Let it go through several passes. If it shows any errors, increase your memory voltage 0.1-0.2 volts and see if it helps. Some times 4 sticks needs a bit more power then 2.
Also I'm obviously new to the whole BIOS thing, how do I go about increasing the voltage to the ram, I've found the documentation on the voltage which needs to be 2.1v and the latency settings of 4-4-4-12.
In any case when I get home i'll reset the bios, check the settings on the ram, format and install vista64 again.
Make sure it's at 4-4-4-12 2.1v but also that it match the fsb. Put the memory multiplier to 2x. lets say the multiplier you have is 2.5, with your old cpu stock (266mhz fsb) your memory was at 665 mhz 1.8v wich is ok. Now that your cpu fsb is 333, the memory is 833mhz at 1.8v... and it's rated to run 800mhz at 2.1v.
I recently did a similar update. I had the same motherboard and updated my E6700 to a Q6600 on Windows XP Home. So the differences are I upgraded to a quad core in the same generation not a Penryn and I had Windows XP versus Vista. I didn't need to reset the BIOS, or re-install Windows. I can see needing to reset the CMOS, but I don't think a Windows re-install is necessary. In the case of Windows XP, the HAL needs to be changed going from single core to multicore, but if you go from dual core to quad core everything works fine. I don't see why Vista should be any different.
What rev of Q9550 are you running? What BIOS revision are you running? The P5W DH Deluxe has supported rev c0 since 2504, c1 with 2704, and rev e0 with the unreleased (according to the download page) 2801. So part of your problem might be BIOS revision. When I go to the CPU Support page and click on the link beside the rev E0, it brings me to a page where is says that 2704 is the latest. Odd?
By the way I really loved that board, so easy to overclock on (the E6700 anyway). I upgraded to a P5Q Deluxe (which I am also very happy with) because these boards weren't really built with quad cores in mind. My Q6600 ran great at stock and up to 3.0GHz, but I wanted more, and I think the VRM wasn't up to it. I had my E6700 easily up to 3.33GHz with very close to stock voltage.
Lastly this may not help you with your present problem, but I found this forum over at xtremesystems very helpful with this motherboard:
I am just going to guess that the P5W's x975 chipset is being pushed too hard with the 1333 fsb since it was only designed for 1066. The memory is the straw that is breaking its back. Some users have much better luck, but not me.
I know for a fact my P5W DH will not run ANY 1333 CPU no matter what Asus says. It just freezes right up with any voltage settings. 1066 cpu's run just fine.