Tom's Hardware > Forum > Overclocking > CPUs > [Solved] Phenom II x4 729 BE overclocking NB?

[Solved] Phenom II x4 729 BE overclocking NB?

Forum Overclocking : CPUs [Solved] Phenom II x4 729 BE overclocking NB?

Hey,

I have Phenom II x3 720 Black Edition running with unlocked 4th core on 3.4GHz (200x17@1.5V) in Asus M4A78XTD EVO.
I have some stability issues (BSOD with "clock interrupt secondary processor" error or something like that) from time to time.

NB and HTT are left at deafult ... the question is:
Should I start fooling around with NB to stabilize my overclock or it doesn't matter at all in my case when I'm overclocking using multiplier only?

Thanks

Reply to The_Gladiator

Best answer

Sounds like that 4th core isn't stable. It may help to raise your NB voltage slightly and lower your HT Link speed one step. You could also be over heating. You may have to go back to 3 cores and aim for a higher overclock.

Message quoted 1 times

Thanks for a quick reply!

megamanx00 wrote :

Sounds like that 4th core isn't stable

How do I indetify which core got unlocked? It was telling me it's in the core #2.

megamanx00 wrote :

You could also be over heating.

My load temp in Prime95 is ~52C

megamanx00 wrote :

You may have to go back to 3 cores and aim for a higher overclock.

Hmmm, interesting. I tried that before but no voltage (went up to 1.55V)/multiplier could get me over 3.4GHz - it wouldn't even boot. Maybe here higher NB would help.

Reply to The_Gladiator

I wouldn't know how to tell which core it was, since I haven't done any core unlocking, but if you turn off ACC (which may go by core unlocking in your specific BIOS), and the problem goes away you know the problematic core #2 referred to by the error messages was the core that got disabled. If the problem persists though then that wasn't it . I wouldn't go over 1.55v. Also, while 52C is a good temp you can't always trust the reported temps on C2 chips. The problems with the thermal diode were not solved until the C3 chips. You may want to use the old free version of Lavasofts Everest to see if the motherboard reports a different, higher, and probably more accurate temperature.