Overclocking Phenom 955 to 3.8ghz

[gaven555]

I've been working hard to oc my pII955 to 3.8 ghz, but I have been running into stability issues. It will last about 5 hours at 3.8 ghz in prime 95 blend, and then prime95 crashes. Here are my voltages.

CPU NB: 1.4V
NB: 1.15V
CPU CORE: 1.45V
DRAM: 1.65V
NB Frequency: 2400MHZ
Max Temp:53C

Any ideas?
Thanks for reading!

 

[ez2012]

For my Phenom II X4 955 I had to set my CPU CORE to 1.55 for 3.8 ghz stable

 

[gaven555]

Thats high,I heard of people doing it at like 1.4V

 

[henydiah]

All system will be diffrent needed voltage and result oc, Cpu nb at 1.4 ? It's too high need to drop to 1.2-1.3 Set nb at 2000 and fsb (cpu frequency let at 200) just increade multiplier. If you oc at 3.8 vcore 1.4 not enough raise to 1.45v-1.5v

 

[gaven555]

I ran the prime95 at 1.475 vcore, and I lowered the north bridge voltage to 1.35v while keeping the other settings the same, and it lasted 7.5 hours at 3.8ghz before I shut down the PC. Is this long enough? Also, if I planned on overclocking to 3.9-4.0ghz, would changing the memory timing, and overclocking the north bridge help? I am asking because I have read about people doing these things, but I do not understand how they influence the overclocking process.

Thanks for your reply!