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trying to get me pII x4 955 BE to 4.2ghz but keep failing on prime95.

Went up to 4.1ghz and bumped up the voltage to 1.475

If i increase the bus speed the ram will overclocked so i downlock it right ?
The HT and NB increase but i leave them at stock voltage

Help please
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Keep your HT at around 2000 Mhz, and start increasing your CPU-NB to somewhere between 2400-2800 Mhz. You will also need to bump up your CPU-NB voltage to somewhere between 1.2-1.35 or maybe even higher, but doing so should help stabilize a high overclock.
 

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What revision is it? Also keep in mind, not all 955s can pass 4ghz. You might need a good deal more volts...
 

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Quote:
Originally Posted by madengineer View Post

What revision is it? Also keep in mind, not all 955s can pass 4ghz. You might need a good deal more volts...
I'd guess it's probably a C3, most cases I've seen and that includes the one I have C2's have a hard time north of 3.8.
 

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Most if not all Phenom II chips hit a limit some where around 3.8-4.2Ghz.

So 4.1Ghz maybe, just maybe your limit.

Since you have made it to 4.1Ghz, just keep trying what you have done to get there. But chances are no more speed is available.
 

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Quote:
Originally Posted by ginger_nuts View Post

Most if not all Phenom II chips hit a limit some where around 3.8-4.2Ghz.
So 4.1Ghz maybe, just maybe your limit.
Since you have made it to 4.1Ghz, just keep trying what you have done to get there. But chances are no more speed is available.
The C2 hit the limit at about 3.8ghz

But the C3 usually hits the wall at 4.2 (I can get mine to 4.4 on 1.6 volts (Stable)
 

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Quote:
Originally Posted by madengineer View Post

The C2 hit the limit at about 3.8ghz
But the C3 usually hits the wall at 4.2 (I can get mine to 4.4 on 1.6 volts (Stable)
Yes there is always exceptions.
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Some can get just as high OC's with lower V's.

But at the end of the day each chip is different, each board is different and every possible setup is different.

Some times people see others with a higher OC, and think they can get it.

Forgetting not all is made equal.

Don't meaning to sound preaching like
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