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Phenom II 720BE overclocking questions

post #1 of 6
Thread Starter 
So I just upgraded, (See sig rig).

So far I've managed to get the PII 720 to 3.6ghz with 1.4v. The only problem is, that seems to be the max. I've tried 3.7-4.0ghz with Vcore as high as 1.55v, but so far nothing has helped stablity.

- Stepping: C2
- Memory clocks: 1600mhz @ 8-8-8-21 1T
- Stock reference clock, only using multiplier to adjust CPU freq.
- CPU: 200 x 18 = 3,600ghz
- PCI-e clock locked at 100MHz
- Temps under load @ 1.4v @ 3.6ghz = 31c /// Idle = 23c
- Fourth core unlocks but is unstable. Boots to BIOS but that's it. Voltage has no effect on stability

So far I've tried adjusting with no effect on stability at 3,600+ ghz.

- Memory clocks / timings. No effect with 1066 though 1600. Loose timings have no effect as well.
- HT and NB frequency. Tried 1600 though 2000 on both with no effect.
- Raising NB VID has no effect.
- Raising NB Core has no effect.
- Dropping the multiplier and raising reference clocks has no effect

Anything I'm overlooking or should try?
post #2 of 6
These chips do tend to hit a wall at 3.6 a lot. Had one myself and it was basically the same. 3.6 with nice voltages but nothing else would get it to budge past that. To me it looks like you have tried everything. What are your temps like?
Frank
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Frank
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post #3 of 6
Thread Starter 
3.6 the limit huh. Well that sucks, but coming from a Brisbane 5000+ @ 3.3ghz, I'm more than happy with 3.6ghz on a PII.

Temps are amazing. Under load @ 1.4v I'm sitting at 31c.
post #4 of 6
It's not set in stone, but a lot of the AM2+ phenom II chips seemed to stop clocking around the 3.6 mark. Some made it to 3.8, but it wasn't common.
Frank
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Frank
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Dominatrix
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post #5 of 6
Thread Starter 
Its an AM3 chip.

394
post #6 of 6
Should have remembered that from the fact I was using DDR3 with it lol. Was a while ago redface.gif
Edited by robbo2 - 4/15/12 at 11:15pm
Frank
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Dominatrix
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Frank
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Dominatrix
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CPUMotherboardGraphicsRAM
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Hard DriveHard DriveCoolingOS
Samsung 256gb 850 Pro 2Tb WB Black Corsair H100i GTX Win 10 x64 
MonitorKeyboardPowerCase
AOC U3477PQU Leopold Cherry Browns  EVGA 850W SuperNOVA G2 Fractal Design Define R5 
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CPUMotherboardGraphicsRAM
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