"ASUS P5Q Deluxe discussion".

[CryptiK]

I just started getting some instabilities in an otherwise rock solid OC. It started after installing 1306, so I reverted back to 1201, then 1103, and finally back to 803. The problem persists in all these BIOS versions.

Basically, the problem is that I hang when XP boots. It goes from the blue welcome screen, pauses for 10-15 secs, loads up my wallpaper, then that's it. I have full mouse / keyboard control, but can't ctrl-alt-del. BTW, I did manage to get into XP once and threw every stress test I could at it, and I passed with flying colors.

To fix the problem, I started playing with voltages, and lo and behold, by upping my FSB term voltage from 1.36 to 1.40, everything's fine again.

But here's what I don't get....why all of sudden do I need more FSB term voltage to boot? Did installing 1306 screw something up, even though when I reverted to previous versions that problem still persists? Is my XP install corrupt?

I doubt your XP install is corrupted. It's weird too, because I got pretty much the same thing! I was fine and rock stable 1201, then started getting instability at the previously stable settings, so I upgraded to BIOS 1306, then I started getting massive instability issues, worse than using 1201. I have also tried down-flashing to 1201 then 0803, and the problem has persisted. I can't get 5 passes of linpack stable now at all, unless I use PL 10 which gives me very slow performance. I got it to pass using PL 7, and then my pc failed to reboot after passing 5 passes, go figure, that has me really confused. I think BIOS 1306 really screwed something up. However the problem presented itself using 1201 and I went from rock stable to unstable overnight.

Trust me i can't do 3.6ghz stable ever since putting 1306 bios and now that you posted i thought i was nuts and mayeb CPU degraded or mobo is screwed... it still can be CPU degradtion...... but since you posted your issue.

I also went to 1201 Official . then to 0803 and same frigging thing .. can't pass linpack 1.4 at 3.6 no more.

So right now i am tryinh Kets modded 1201 bios to see how it is......

We as in you and a selected few .. may have to shut PC down... Unplug Power Supply Wire (after turning PSU off) and then clear CMOS with jumper and pull battery otu at same time and when done that with battery out and jumper crossed. push in the PC's power button a few times holding it about 20 secs each time ..... then let it sit for 10 min or 20 min and the uncross jumper . install battery and then plug PSU in and turn it on .... boot PC into bios load defaults .... then boot again and then set it and see how it goes.

Maybe there is a Quirk in Bios 1201 and 1306 as i could pass linpack 1.4 1201 then i could not so i upgraded to 1306 and same thing .. so for me it can be BIOS. CPU degration and or Mobo issue.

I am still tetsing it.

Anyhoo i am waiting for my E8600 to arrive and i hope all is fine with my MOBO and other parts.

Sounds like we all have similar issues. This is doing my head in, I have never had such a flakey dodgey board, seriously. Very disappointed in Asus. I have tried clearing CMOS, swapping ram, & swapping PSU. I have tested al my gear seperately and together in my mates P5K and all my gear is totally fine.