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[Seeking Advice] Phenom II x2 555 BE 4.0GHz goal

post #1 of 7
Thread Starter 
Hi everybody!

So, I have a Phenom II x2 555 BE in which I would like to overclock to 4.0GHz.
From what I have read online it should only take 1.4 to 1.5volts to stabilize...

I am at 3.9GHz (19.5 x 200) around 1.53-1.54V on water however.
(At the time of this post 12 hour prime stable)

I idle around 23C and load around 45C (~15C below max temp)


How much degradation will I see if I go past 1.55V and max out at 1.6V?

When I was fiddling around with voltages I seemed to have found a stable 4.0GHz at around 1.55 but it would peak the voltage to 1.56 and 1.57 so I didn't dare prime it.


Is there anything else that I can tweak such as the NB frequency or the ram timings to allow lower vcore?
I'm currently at:
  • RAM 1600MHz 8-8-8-24 T2
  • NB 2600MHz
  • HT 2000MHz

Also, I get only 124 bsod codes when ocing core freq which typically mean more vcore.

Do any of these numbers seem abnormal or unreasonable?
Edited by dcyli - 2/15/11 at 1:25pm
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post #2 of 7
You probably got a normal chip, i get my 555 stable @ 4.2ghz with just 1.45v and those temps seem a little high to me, maybe you should reseat the heat sink of the h-70...i have a common 212+ on my chip and load temps don't pass 42c
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post #3 of 7
Thread Starter 
Quote:
Originally Posted by amd-dude View Post
You probably got a normal chip, i get my 555 stable @ 4.2ghz with just 1.45v and those temps seem a little high to me, maybe you should reseat the heat sink of the h-70...i have a common 212+ on my chip and load temps don't pass 42c
Just remote desktopped to the computer in question. It's loading at 38C.

So a normal chip will need this much voltage?

What should be my next step to get to 4.0GHz? Is the voltage too excessive or is the cpu too normal to get up to that speed?

I have heard 1.55V was the limit before it starts reducing my cpu life significantly. Is it the voltage that degrades the cpu or the heat?
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post #4 of 7
Well again its a question of who says what...i don't know if my chip is a magic chip personally, but some of the more experienced guys here told me that i did get a good chip because most 550, 555, and 560's need like 1.5-1.55 volts to get into the 4ghz range.

I too have heard many different voltages being thrown around...i know the max safe air cooler voltage is 1.55v and the max safe water cooler voltage is 1.6-1.65v, but i have heard the degradation takes place past 1.47v again i don't know if this is true cause i never had to test mine above 1.45v cause i got the overclock i wanted which was a 1ghz overclock
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post #5 of 7
Interesting. Are you unlocked? Unlocked you would be pushing twice the TDP which may be unsafe on that board (which has a known history of VRM failure problems), but should be fine with 2 cores.
post #6 of 7
Wait which one of us are you refering to xd_1771 cause i did heed your warning and locked my other 2 cores...sorry for the confusion i see the OP and myself have msi boards which both go caput.
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post #7 of 7
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post
Interesting. Are you unlocked? Unlocked you would be pushing twice the TDP which may be unsafe on that board (which has a known history of VRM failure problems), but should be fine with 2 cores.
I've read all of that thread that you posted in before. I know most of what's going on with the MSI mobos.

You can see that I've locked both my cores... :[
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