Overclocking i5 2500k

[futureal33]

Afternoon all,

When I built my PC I set an overclock on my i5 CPU to 4.3ghz. Since then it has been running smoothly with no problems.
The other day, I checked CPU-Z to have a look at something, and noticed it had reverted back to its factory clock settings 3.3ghz!

Anyway...

I have been trying all morning to apply an overclock in the BIOS back to 4.3ghz and it just wont take it. When it loads into Windows it is still reporting 3.3ghz (both on Windows and on CPU-Z)
I have tried everything I can think of, but it just wont apply the OC settings...

Can anyone help?

Cheers

 

[arad85]

Which Motherboard? What have yous et in the BIOS and where are you taking the clock value from in CPU-Z?

 

[futureal33]

Andy,

Using an MSI Z77A-G43 mobo.

In the BIOS I have changed the multiplier from 33 to 43, turned off turbo boost, upped the CPU V-Core by 0.2V.

Then when I load into Windows, I open CPU-Z and look on the CPU Tab and this is what I see:


Untitled-1 by futureal33, on Flickr

and


nonidle by futureal33, on Flickr

 

[neil_g]

CPU-z will show the throttled back speed if idling.

 

[futureal33]

Yeah, but even under load it isnt going above 3.3?

 

[arad85]

In the BIOS I have changed the multiplier from 33 to 43, turned off turbo boost, upped the CPU V-Core by 0.2V.

And there's your problem.....

Leave Turbo Boost on. The way you overclock i5/i7 is to increase the maximum turbo boost frequency. You've turned turbo off, so it's limited to the spec'd 3.3GHz. Enable it and it will overclock when needed...

As to Vcore voltage - does it not have an AUTO setting? I'd leave it on that if it does (my mobo increases voltage depending on load automatically).

 

[futureal33]

And there's your problem.....

Leave Turbo Boost on. The way you overclock i5/i7 is to increase the maximum turbo boost frequency. You've turned turbo off, so it's limited to the spec'd 3.3GHz. Enable it and it will overclock when needed...

Just done this and its no different, reporting 3.3ghz. If I print screen my BIOS would that help?

Cheers

 

[neil_g]

Yeah, but even under load it isnt going above 3.3?

sorry was on an iphone at the time, didn't see the 2nd shot.

id factory reset your bios and start again.

set the bus to 100 then change the multiplier to 43. you shouldn't need any vcore tweeks at this stage beyond the auto setting.

 

[futureal33]

Neil,

Just tried that too Still no luck.

Print screen attached of my BIOS settings... anything jumping out at you there? Ive done everything I can think of?!

Cheers


msBS0001 by futureal33, on Flickr

 

[futureal33]

Just sorted it!

I updated the BIOS and its all working at 4.5ghz now

Ive got the CPU voltage on manual running at 1.376V - I may reduce that a little and see if still stable.
Flying machine now!!

Thanks for the help
Nick

 

[neil_g]

having a quick google it does seem to come up a bit on msi boards.

in the bios check to see if limit cpuid maximum and overspeed protection are enabled also EUP 2013 in power management.

others have updated the bios to the latest. also check that CPUZ is on the lastest (although that doesn't explain why it would show previously).

edit - thatll teach me to leave the thread open for too long and not refresh before replying..

 

[futureal33]

Just noticed,

Now I have overclocked it, it is running at 4.5GHZ all the time... whereas before it would idle at 1600mhz and turbo to 3.3ghz when required...

Is there any way to get it back to running like that, but boosting to 4.5ghz when required?

Cheers

 

[arad85]

Set adjust CPU frequency in os. This needs to be enabled...

 

[arad85]

Set adjust CPU frequency in os. This needs to be enabled...

Did this work by any chance?

 

[Lyonspride]

Was this a pre-overclocked bundle?

If so, then there should be a selection of preset bios settings which you can load in from the main bios screen. Check instructional bit at the bottom of the screen.