Q6600, Abit IP35-Pro, and Voltage Levels

[gillagad]

Specs:
Q6600 G0 stepping
Abit IP35-Pro mobo
2x2GB G-Skill DDR2 800 5-5-5-15
Visontek HD 4870
Corsair 750w PSU

I'm new to OCing so I started off just taking the Q6600 up to 3.0GHz (333 x9) which was successful without a hitch. Now I'm trying for 3.2 and seem to keep running into problems. I tired 400fsb x8 but it wouldn't boot, I read that the P35 boards sometimes don't like 400+ fsb so I tried 355 x9 which boots up fine. Temperatures are all good (43-57C in Prime95) but on the second Prime95 test (length 8k) my voltage alarm goes off. I have it set to:

CPU Core: 1.305 V
DDR2: 1.8 V
CPU VTT: 1.2 V
MCH (NB): 1.25 V
ICH (SB): 1.05 V
ICHIO: 1.5 V

The alarm only goes off once all threads are on that 8k length test and ends the second I stop the test. CPU-Z reads a Core Voltage of 1.27 V at the time. Am I doing something wrong? Or is it possible I have a faulty sensor? Any help/advice would be appreciated.

 

[faster3200]

I am pretty sure P35 has no problem with 400+ fsb, that was the nvidia ones that had that issue. The Abit IP35 Pro can hit 500mhz+. I also own the IP35 Pro and Q6600 combo and I hit 3.6ghz (400x9) no problem. Hitting 3.7ghz was a bit harder and required a fairly high voltage increase. 3.8ghz however required almost least 1.6v any more voltage than that I would bsod. My temps were ok the entire time. Turns out that this board can't hit the super high clocks with quads because it has 4 phase pwm instead of 8 phase. Due to this anything above 3.6ghz is a battle. I know this isn't entirely relevant but I just wanted to give you a heads up.

As for your problem the IP35 Pro has a pretty bad vdroop issue. Try upping your voltage a bit and see if you still get the alarm. If you can't get rid of it you can disable the alarm in the bios.

 

[gillagad]

I upped the voltage to 1.395 and it booted at 400 x8. Buuut CPU-Z is reading that I'm at 3.6GHz, BIOS is set to 400 x8 and reports 3200MHz... Whats the deal with this?

 

[iluvgillgill]

what ever cpu-z reports is real dont trust BIOS,system properties etc.

 

[gillagad]

That's what I figured. So if every time I try 400 x8 it reads as 3.6Ghz... the only way I'm gona get 3.2Ghz is 355 x8 right? Though could anyone explain why setting 400 x8 would read as 3.6Ghz?

 

[iluvgillgill]

its your BIOS not setting the multilpier you specified, the only way to solve it is to see if there are newer BIOS to update it and hopefully it will fix the problem.

 

[gillagad]

Seems to be working correctly now. Stress testing for about an hour now with no errors or voltage alarms, hopefully it stays that way overnight. Thanks for the help.