Comp crashing after unlocking 4th core on Athlon II X3 435

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DrMrLordX

Lifer
Apr 27, 2000
23,232
13,323
136
I had the same problem with my Sempron 140 on a 790FX-GD70 (perpetual reboot at Windows). I couldn't get the second core stable, no matter what. Even downclocking the CPU didn't help.

Dunno why your CPU would unlock on one board but not another. It might be due to different implementations of acc.

Also, have you tried booting into memtest86 instead of windows after unlocking the fourth core to see if your memory/memory controller are stable after the unlock? Sometimes it's the northbridge/integrated memory controller that wig out after an unlock, hinting that you need to raise cpu-nb or nb voltages to stabilize it.
 

deimos3428

Senior member
Mar 6, 2009
697
0
0
How do i change the CPU-NB volts? I have the most recent version of the BIOS. There isnt an option for that exactly. there is a multiplier for cpu-nb though.
Well, in your case the board calls it "VDDNB Over Voltage". Bump it up in very small increments to see if it helps, I believe the default is 1.2V.
 

Drj312

Junior Member
May 20, 2010
13
0
0
Well, in your case the board calls it "VDDNB Over Voltage". Bump it up in very small increments to see if it helps, I believe the default is 1.2V.

Thank you. Ive been trying to figure out which one it is exactly. It seems the default was .8. I bumped it to .9 and it failed. I'll try a lower setting.

Ive also been reading about turning off loadline calibration so i might try that