Question about C1E/Speedstep

[Craig321]

I'll be turning Speedstep on when I get my Q9550 just to let it rest when it's idle.

As I am overclocking, is there anything I need to do (e.g. manually set the CPU voltages to default) to ensure the PC doesn't crash when Speedstep is enabled?

I would have thought Speedstep might decrease the voltages a bit too much if overclocked and cause the PC to crash?

Or, should I be turning Speedstep off all together if I'm overclocking?

Thanks,
Craig.

 

[Mikoyan]

I myself have speedstep turned off due to overclocking I can imagine speedstep being useful or safe for a non overclocked cpu, but when ramping up voltages to keep an OC stable speedstep may interfere with the OC and possibly cause crashes/reboots.

Im sure someone can confirm this.

 

[reflux]

Nope, SpeedSteep used to cause problems for overclocked CPUs when it first came out, but these days it is designed so it does not hamper custom clock and voltage settings.

 

[Mikoyan]

Never knew that but when I read on other forums and here if its recommended or not and its generally been a no OR disabled while getting to your desired OC then enabling it.

 

[reflux]

That's what I always used to think, but someone made a very informative post about how it works on modern boards a while back. You should still only set it when you have stress-tested your overclock though.

 

[Craig321]

Thanks for the replies guys

Would these improvements only apply to newer boards, or to all boards with an up-to-date BIOS?

P35-DS4 rev 1.0 with latest BIOS here.

I think, if I've got the latest decent Speedstep, I'll overclock, do Prime etc., then turn Speedstep/C1E back on.