e6300 Overclocking Speedstep^ Question

[Lamus]

Hey,

Just upgraded my HSF to arctic freezer pro 7 and gettind idle temps of 26'C which makes me very happy x) cant wait to overclock her. One quick question is whether the Speedstep?? thing should be disabled for overclocking - don't know if anyone knows of it causing problems for OC'd CPU's. Speestep?? currently drops my load CPU of 1.26v to 1.11v when idle...

Please inform and advise, thanks
Lamus

 

[Cob]

Disable it when you're overclocking and then re-enable it when you're finished if you wish.

 

[Gatsby]

I've been overclocking my 6300 with speedstep enabled, haven't had any problems.

 

[muon]

Doesnt speedstep lower the voltage? So if you have a 450mhz bus, with speedstep kicking in, itd be 6 x 450mhz and therefore the voltage used may not be enough?

 

[Lamus]

Disable it when you're overclocking and then re-enable it when you're finished if you wish.

So you mean when I've finished playing around and have found a stable clock, then re-enable it with my overclocked settings?

 

[Mortster]

I, personally, just disable speedstep and be done with it. period.
I'm not really interested in the power saving that it provides.
but then I do not have my rig on 24/7

 

[hnfmr]

Doesnt speedstep lower the voltage? So if you have a 450mhz bus, with speedstep kicking in, itd be 6 x 450mhz and therefore the voltage used may not be enough?

Well, sorry for hijacking your question...but I wish to know the answer as well...

 

[WJA96]

Doesnt speedstep lower the voltage? So if you have a 450mhz bus, with speedstep kicking in, itd be 6 x 450mhz and therefore the voltage used may not be enough?

Speedstep drops the multiplier so if you're already running 6x you'll see no change. C1E changes the voltage and that will have to be disabled for stable overclocking.

 

[snowdog]

Speedstep drops the multiplier so if you're already running 6x you'll see no change. C1E changes the voltage and that will have to be disabled for stable overclocking.

C1e drop voltage? Never noticed that it only ever reduced the multiplier by 1 on my pc when idle... Did nothign else I noticed, no changes in voltage...

 

[WJA96]

C1E and Speedstep are two different technologies. One varies the voltage, one drops the multiplier. Not all CPU's and motherboards support all technologies, but all Core2Duo's support both as far as I know.

 

[Mike_P]

I was under the impression they both lowered voltage and frequency, C1E was an on/off deal and EIST did it in graduations (similar to Cool 'n' Quiet IIRC).

 

[WJA96]

I was under the impression they both lowered voltage and frequency, C1E was an on/off deal and EIST did it in graduations (similar to Cool 'n' Quiet IIRC).

V1.1 is used by second generation Pentium III processors. It enables the CPU to switch between two modes: high and low frequency. This is done by modifying the CPU's multiplier. A 1 GHz Pentium III consuming about 20 watts could be reduced to 600 MHz which reduces the power consumption to about 6 watts.

V2.1 (Enhanced SpeedStep) is used in Pentium III-Mobile processors and is similar to the previous version, but in the low frequency mode the CPU also uses a different voltage than the high frequency mode.

V2.2 is adapted for Pentium 4-Mobile processors. With this a 1.8 GHz Pentium 4-M consuming about 30 watts can lower its frequency to 1.2 GHz, thus reducing power consumption to about 20 watts.

V3.1 (EIST) is used with the second generation of Pentium Mobile processors (Banias core, used in Centrino platforms). With this technology the CPU varies its frequency (and voltage) between about 40% and 100% of its base frequency in increments of 100 MHz. With this technology Intel also introduces realtime Level 2 cache capacity variation, further improving power savings.

V3.2 (Enhanced EIST) is adapted for dual-core processors with unified Level 2 cache.

C1E appears to be the bit of EIST that varies the voltage. It does seem to be a bit of a complex area though.

 

[Mike_P]

C1E appears to be the bit of EIST that varies the voltage. It does seem to be a bit of a complex area though.

I believe they're separate, you can have C1E without EIST, the PentiumD processors don't support C1E but do (well most) support EIST.

 

[A2Z]

hmmm

ive got a e6300, and i noticed in CPU-Z it shows the multiplier at 6x instead of 7x, although it does jump to 7x once in a while for a few seconds

i assumed this was a bug in cpuz, but maybe its this speedstep thing? do i disable it in BIOS?

 

[WJA96]

I believe they're separate, you can have C1E without EIST, the PentiumD processors don't support C1E but do (well most) support EIST.

That's not incompatible what what I've posted.

 

[WJA96]

hmmm

ive got a e6300, and i noticed in CPU-Z it shows the multiplier at 6x instead of 7x, although it does jump to 7x once in a while for a few seconds

i assumed this was a bug in cpuz, but maybe its this speedstep thing? do i disable it in BIOS?

Yes. C1E/EIST/Speedstep. Disable all of it.