Turbo Boost i5 ?

Darth Bane · 2 Jul 2011 at 13:35

Hey guys,

Just looking for advice please so i the other week i overclocked my i5 sandy bridge 2500k from 3.30 Ghz to 4.20 Ghz, all i did was go into the Bios and change the cpu multiplyer from x33 to x42 and nothing else.
I ran prime95 for a few hours and every thing is fine.

Just want to ask two questions please

1. Is just changing the multiplyer enough for sandy bridge ? do i have to do anything else?, i don't want to damage my cpu in the long run.

2. I was told by a friend to turn off the Turbo Boost in the Bios when you overclock is that true ? if so why ?

Thanks for your help guys o yeah i have......

i5 2500k

MSI P67GD65 Mobo

Ripjaw X 1600 mhz 4GB Ram

Jordan97 · 2 Jul 2011 at 15:10

1) Congratulations! You have successfully overclocked your CPU! There is nothing else you need to do, unless you find you are having stability issues, in which case you will need to raise the Vcore in the BIOS.

2) Yes, you should disable TurboBoost I am not sure of the specific reason, but it has something to do with the speeds changing in Windows after the OC and causing problems. Best to just turn it off to be on the safe side.

Darth Bane · 2 Jul 2011 at 17:56

Thanks for the reply, so i should turn off the turbo boost to be safe ?

Jordan97 · 2 Jul 2011 at 18:25

Yes. There have been some people recently who have noticed there speeds randomly decreasing when under load that was solved once TurboBoost was turned off.

paradisiac · 2 Jul 2011 at 18:27

Jordan97 said:
Yes. There have been some people recently who have noticed there speeds randomly decreasing when under load that was solved once TurboBoost was turned off.

mine does this, and i dont know how to turn it off

so i would recommned if you have an easy option then do it, else stability testing will be a nightmare.

Jordan97 · 2 Jul 2011 at 18:29

paradisiac said:
mine does this, and i dont know how to turn it off so i would recommned if you have an easy option then do it, else stability testing will be a nightmare.

Still not found a way? What is your motherboard?

paradisiac · 2 Jul 2011 at 18:31

Jordan97 said:
Still not found a way? What is your motherboard?

ASRock Z68-Extreme4. what i have done is enabled the auto oc and that fixes it. then just manually change the voltages. so far it just failed prime after 59min 4.4GHz @ 1.240v. so trying @ 1.250v.

Jordan97 · 2 Jul 2011 at 18:33

Ok, good luck.

I'll have alook around and see if I can found a way of turning of the TurboBoost on that board.

paradisiac · 2 Jul 2011 at 18:35

Jordan97 said:
Ok, good luck.

I'll have alook around and see if I can found a way of turning of the TurboBoost on that board.

cheers. is there anything that will fail it quickly? if its going to take nearly an hour on each bump up then i will be here forever.

Jordan97 · 2 Jul 2011 at 18:41

paradisiac said:
cheers. is there anything that will fail it quickly? if its going to take nearly an hour on each bump up then i will be here forever.

Not that I know of. That is why you should do it when you are occupied. Some people like to do a stress test before they go to bed, or before work.

Concerning your TurboBoost problem: I downloaded the manual and had a look through the BIOS section. According to that, there should be an option for TurboBoost on the 'OC Tweaker Screen'

paradisiac · 2 Jul 2011 at 18:43

yeh, i had that turbo boost option, and then it disappeared :confused:

i cant see the point in doing it overnight until im pretty sure its stable, if it fails 50mins in, then it wont get started til the following night. if that then fails 1 hour in, then thats another night gone. so start the next night.................and it could be weeks before its done. i could do with something that proper stresses it for 30mins or something, which if it passes that there is a 90% chance it will prime.

Jordan97 · 2 Jul 2011 at 18:47

If it has just dissapeared. You would most probably get it back after a BIOS update.

What stress tester are you using?

paradisiac · 2 Jul 2011 at 18:50

Jordan97 said:
If it has just dissapeared. You would most probably get it back after a BIOS update.

What stress tester are you using?

prime blend at the moment

i used windows experience indexing to get the lowest and then working up from there. will BSOD WEI on anything below 1.240v but that failed prime. so is now priming on 1.250v.
it dissapeared when i changed the vcore to fixed, or the cpu llc not sure which 1 did it. havent set them back to auto to see if it comes back as the auto oc seems a simple workaround for now.

Jordan97 · 2 Jul 2011 at 18:53

It must have automatically disabled itself when you changed the Vcore to fixed.

Prime95 is the best stress tester there is. Unfortunately, overclocking is a very time consuming proccess.

whipgeez · 2 Jul 2011 at 19:18

i just overclocked the turbo multiplyer

don't suppose there's much difference either way?

paradisiac · 2 Jul 2011 at 19:20

whipgeez said:
i just overclocked the turbo multiplyer

don't suppose there's much difference either way?

does it run at its max speed when priming?
when i just did the multiplier (set it to 44, 45 and 46) and everytime i tried to prime test it, the multi would fluctuate from 38-42 and occassionally hit the multi i set.

whipgeez · 2 Jul 2011 at 19:28

runs at max during prime and other cpu intensive apps

Jordan97 · 2 Jul 2011 at 19:37

Maybe its just your chip then, paradisiac. You get a duff one now and again.

paradisiac · 2 Jul 2011 at 19:39

Jordan97 said:
Maybe its just your chip then, paradisiac. You get a duff one now and again.

maybe, but it runs fine when the auto oc is on. i think its just ASRock do their bios different to most others.

Jordan97 · 2 Jul 2011 at 19:41

paradisiac said:
maybe, but it runs fine when the auto oc is on. i think its just ASRock do their bios different to most others.

Possibly. Although Asrock have gotten very good reviews in the past, especially on their P67/Z68 Extreme models.