quad 2.4 G0 keeps fluctuating in core speed

[jjyiz28]

http://img.photobucket.com/albums/v230/jjyiz28/cpu.jpg

i am just in my desktop, and as you can see from that picture, my multiplier drops to 6 and my core speed goes down to 1.6ghz, then spikes up to multiplier 9 and 2.4ghz.

when i play a game like city of heroes, it stays at 2.4ghz with multiplier at 9 on both cpu-z and rightmark. i already set my CPU speed manually at 9*266mhz = 2.4ghz in my bios. my CPU isnt' overheating, it idles at around 40-44C for all 4 cores. whats going on?

 

[kenny0813]

you gotta turn off C1E and SpeedStep from your BIOS. They're power-saving features from Intel that bring down your voltage and multiplier when your cpu is idle.

 

[jjyiz28]

Originally posted by: kenny0813
you gotta turn off C1E and SpeedStep from your BIOS. They're power-saving features from Intel that bring down your voltage and multiplier when your cpu is idle.

thank u very much sir. turned off c1e, but didn't see an option for speedstep on my gigabyte p35-ds3p, and now it stays at 2.4ghz. =)

 

[SexyK]

why would you want to turn off these features? Leave em on - they're not slowing you down at all.

 

[postmortemIA]

..they are just keeping cpu cool and reducing power consumption.

 

[imported_rod]

^^As the two posts above me have said - these features only reduce your speed (and therefore power and heat) when you're not maxing out your CPU.

Unless they're causing problems, leave them on.

 

[imaheadcase]

Well they are known to cause issues. Esp with distributed programs running in background is a top one on the list.

 

[Gophermofur]

I believe Speedstep is noted as: "EIST" on the DS3 motherboards. I'm not sure if it's the same for your mobo though.

From a DS3, overclocking Guide:

CPU EIST Function__________ [Disabled]
There is some discussion that EIST does not affect overclocking as the processor will run full speed when needed and slow down when idle reducing temps and in general being a well behaved nice thing. It does take some system memory. For now we will disable it until we have the machine characterized because the FSB jumping around will drive us nuts. It can be turned on later once we know what the machine will do and if we take notes as recommended you will immediately be able to see the results of enabling this, for now, disabled.

 

[Ika]

SpeedStep is known as it's formal name in Gigabyte's motherboards. Look for an option in Advanced BIOS options that acronyms out to EIST.

 

[BonzaiDuck]

I'm still exploring these issues. That is, I'd like to get Speedstep to work with my OC setting, and while I haven't found that it doesn't work at all, I have no indication yet that it does.

However, I've tentatively concluded as follows. At least for my 680i board, dropping the multiplier to 8 and then enabling Speedstep causes the system to crash just after booting into windows. Leaving the multiplier at 9 with Speedstep enabled seems perfectly stable.

I can intuitively imagine how this might be the case, but don't have enough detail to express it, so anyone else is encouraged to chip in their two-cents worth on that one.

 

[jjyiz28]

Originally posted by: Aflac
SpeedStep is known as it's formal name in Gigabyte's motherboards. Look for an option in Advanced BIOS options that acronyms out to EIST.

what do you know, i DID have that option in my bios. it defaulted to disabled.

 

[Acanthus]

Originally posted by: Gophermofur
I believe Speedstep is noted as: "EIST" on the DS3 motherboards. I'm not sure if it's the same for your mobo though.

From a DS3, overclocking Guide:

CPU EIST Function__________ [Disabled]
There is some discussion that EIST does not affect overclocking as the processor will run full speed when needed and slow down when idle reducing temps and in general being a well behaved nice thing. It does take some system memory. For now we will disable it until we have the machine characterized because the FSB jumping around will drive us nuts. It can be turned on later once we know what the machine will do and if we take notes as recommended you will immediately be able to see the results of enabling this, for now, disabled.

On a side note, EIST only drops the multi down to 6, it doesnt adjust the FSB. (at least not on the DS3 or P35).