What is core speed?

Gone2mars · 4 Jan 2009 at 18:50

OK ... The one thing i've never done with computers is try and overclock them

I've just started looking at my specs (while following the sticky guide on the forum) and i have a question

I have an Intel e8400 3.0ghz ... It runs 6 x 333

Now this is the bit i'm confused with ... 6 * 333 = 1998. Shouldn't my multiplier and FSB equal 3000 i.e. the 3.0ghz bit of my CPU?

I know this is the 'Core speed' but in what way does that relate to the CPU speed i.e. 3.0ghz?

If i overclock for example 6 x 400 this has a core speed of 2400, but what does that make my CPU? 3.2ghz, 3.4ghz, 3.6ghz???

How'd i work it out?

I know i've missed something somewhere

95thrifles · 4 Jan 2009 at 18:53

I presume you're getting this from CPU-z,
fairly certain you've prob got speedstep,C1E, EIST still running, go into your BIOS and disable any/all of them then you'll see your correct speed. Theyre powersaving functions that declock your CPU when it doesnt need to be running at full

Gone2mars · 4 Jan 2009 at 19:01

Ahhh .... So my multiplier isn't 6!

That was confusing the hell out of me ... thanks for the quick response

Aod · 4 Jan 2009 at 19:05

Gone2mars said:
Ahhh .... So my multiplier isn't 6!

That was confusing the hell out of me ... thanks for the quick response

but it's reccommended that you leave the power-saving features on, they have no detrimental effect on performance

Gone2mars · 4 Jan 2009 at 19:39

Lol thanks all ... My FSB now reads 333 and my multiplier is 9.

After i've finished overclocking is it beneficial to re-enable the speedstep setting?

Surely running the CPU at max all the time would effect lifespan?

Corona_Rex · 4 Jan 2009 at 21:47

Save the planet - use speedstep

jamjar · 4 Jan 2009 at 22:27

95thrifles said:
I presume you're getting this from CPU-z,
fairly certain you've prob got speedstep,C1E, EIST still running, go into your BIOS and disable any/all of them then you'll see your correct speed. Theyre powersaving functions that declock your CPU when it doesnt need to be running at full

think i,ve got that too , where abouts in the bios is that found ? :confused:

95thrifles · 4 Jan 2009 at 22:29

Depends what BIOS you've got but as Corona says you only really want to turn it off whilst youre OC'ing so you can check your OC, once stable its best to put it back on really

jamjar · 4 Jan 2009 at 22:50

95thrifles said:
Depends what BIOS you've got but as Corona says you only really want to turn it off whilst youre OC'ing so you can check your OC, once stable its best to put it back on really

God ! i,ve hunted everywhere for those settings in my bios , am i missingsomething ? looked under power nothing , what will they be called ? :confused:

Gone2mars · 5 Jan 2009 at 10:23

I found it in the 'Advanced' menu of my BIOS. Under the CPU settings.

I had to disable speedstep and something called C1E as 95thrif suggested

I also found a guide specific to my motherboard by typing in 'P5Q-E overclocking' into google ... try doing the same with whatever your motherboard is.