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CPU underclocked?

Skilid

Skilid

Skilid

Soldato
Joined
20 Sep 2006
Posts
2,857
Location
Hampshire
Hey guys, sorry if this has been posted up loads before, but I have a Core i5 processor that is supposed to be rated at 2.66GHz. It is currently running @ 2GHz even when running Prime95. It is also supposed to overboost to 3.2GHz when needed, but isn't.

2rcwua8.png


358q541.png


Rest of spec:

4GB DDR3 Memory (Dual Channel)
Gigabyte PM55-UD2 Micro ATX Board
Scythe Mini Ninja (CPU temp in BIOS is 27 degreess C)

Any help will be much apprecaited guys, also if there is a cheeky move that I can do to overclock it a bit (permanently) that would be cool. I understand that I have to stability test it etc. I'd be happy with something like 3.4GHz

But getting it to it's original speed is more important atm lol.

Cheers.

Cripple.
 
Last edited:
it downclock's it while you arnt doing anything intensive, if you open up something intensive, like prime95 or a game, it will go back to 2.66ghz. it only does this for powersaving.
 
Looking at your CPU-Z screenshot - your Multiplier is 15 (20 is the default), your BCLK is stock (133Mhz) and your voltage is sub-stock (usually 1.2V+ AFAIK).

This all tells me that you either set the multiplier to 15 and manually lowered the vcore, or that Intel Speedstep is on. It is much more likely to be the latter (check out this thread by RJC).

Try running OCCT stress test for 2 minutes and see if the multiplier jumps up to 20. I suggest keeping speedstep on, it is a clever system that gives you the speed when you need it and saves you power/heat when you don't.

If its not speedstep and you have messed with the BIOS and don't know how to switch it back to stock settings - then I suggest doing a CMOS reset.
 
I'm presuming Prime95 should be able to do the same job? I've been running that for about 20 minutes and the multiplier is still at x15 and core voltage is at 1.008v. I have not changed anything else in the BIOS except auto fan speed and disabled C1E.

=/

Cripple.
 
Thats what it is running at. The multiplier doesn't change, ever. Even if I disable speedstep.

I can only set it manually by the looks of things. Why isn't it changing automatically?

Cripple.
 
What I would do is: Find out the default volts and speed for cpu and ram,
restart, go into bios and load optimized defaults.
then change volts and speed for RAM if requiered
select the correct boot hdd.
manually set multi to 20.hit f10 and enter...
 
Just done all of what you said and it has changed nothing.

I can either have:

- Multi at x15 and it never goes above this and it runs at 2GHz all the time.

or

- Multi set at x20 and it will overboost to x24 and run at 3.2GHz all the time (high cpu fan speed).

Why the hell is it doing this? I have the latest BIOS update.

Cripple.
 
You probably have an option in the bios under CPU features (if not press Ctrl+F1) then disable turbo

Calld "Intel Turbo boost" or similar
 
It is running how it should. you said you want to stop it from "overboosting"
So unless you disable the option it WILL "overboost" :confused:

You can't have it both ways
 
If I have overboost on, it is running with overboost on consistently, it never slows down.

I mean, what I want is for it to slow down to say x15 when not needed, and speed up when it is. At the moment it either runs at x15 (if i set it at x15) or at x24 (overboost) with it set at x20 in the bios. It never fluctuates, and that is what speedstep is supposed to do is it?

Cripple.
 
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