Need help to squeeze what little bit i can out of i5 2400

[namegame]

Hello Forum,looking for a little oc help with my i5 2400 cpu,it's sitting in a asrock z68 pro3-m mobo.I reliaze it's not a k model or unlocked but have read u can get a little out of it...I just need the help kind of in layman terms..I put the pc together a couple week's ago,i' running the stock cpu cooler and my temp's are 35-38F so my temp's are stable.
Many Thanks

 

[ErickMaga]

You'll just need to raise the bus clock.

For sandy bridge ( your cpu) the bus clock is 100 by standard, you'll just need to raise it to 105 or 106, i think somewhere between that line is the maximum you can go.

Just go to BIOS and look for a cpu bus clock or base frequency and raise it.

Since the change will be very small there is no need to raise any voltage.

 

[namegame]

You'll just need to raise the bus clock.

For sandy bridge ( your cpu) the bus clock is 100 by standard, you'll just need to raise it to 105 or 106, i think somewhere between that line is the maximum you can go.

Just go to BIOS and look for a cpu bus clock or base frequency and raise it.

Since the change will be very small there is no need to raise any voltage.

Many Thanks Erick

 

[Maximilian]

Do not touch the bus clock!

Raise the multiplier to its max level. My 2400s is 37, i believe your 2400 is 38 giving you 3.8ghz across all cores. Make sure it is for all cores though as some EFI's offer options of raising it when specific cores are loaded etc.

You shouldnt need to touch the voltage or anything else as 3.8ghz is an easy overclock for sandy bridge quads.

 

[namegame]

Do not touch the bus clock!

Raise the multiplier to its max level. My 2400s is 37, i believe your 2400 is 38 giving you 3.8ghz across all cores. Make sure it is for all cores though as some EFI's offer options of raising it when specific cores are loaded etc.

You shouldnt need to touch the voltage or anything else as 3.8ghz is an easy overclock for sandy bridge quads.

Thanks but i can't raise my multi from 16x in bios it is locked...However the asrock extreme tuner utility goes up to a multi of 38 a little worried about trying it since in bios it says 16x is the max multi my cpu will run at?
I must need to disbale some setting?

 

[nurturedhate]

not looking at the right thing if it showing 16x as your max. 16x or 1.6ghz is the current speed. look in your manual that came with the motherboard.

 

[Maximilian]

Thanks but i can't raise my multi from 16x in bios it is locked...However the asrock extreme tuner utility goes up to a multi of 38 a little worried about trying it since in bios it says 16x is the max multi my cpu will run at?
I must need to disbale some setting?

Do you see something like that?

Change the "CPU ratio setting" to manual then change the "max ratio" option that appears to 38. Exit and save changes.

 

[namegame]

Do you see something like that?

Change the "CPU ratio setting" to manual then change the "max ratio" option that appears to 38. Exit and save changes.

Yes that is what i was trying to change earlier..I had a hard time getting that 16 to change kept coming back up finally changed to 38 partially unlocked on 1 core and i have all 4 core set to auto back to the drawing board..I wonder if my board might be a little flaky?
Thanks again.

 

[namegame]

I ended up getting 2 cores to 3.7 i couldn't get an oc on all 4 core's so i decided to go back to default untill further advice.

 

[T_Yamamoto]

its not a cpu for ocing :/
if you wanted to oc, might as well went with a 2500k

 

[dma0991]

I ended up getting 2 cores to 3.7 i couldn't get an oc on all 4 core's so i decided to go back to default untill further advice.

With the Core i5 2400, you're only limited to overclocking the Turbo Boost to a certain amount of speed bins above stock. Turbo Boost will not give you an overclock on all 4 cores as it relies on having higher frequencies on 2 cores and to make sure that the power consumption and heat is within its safe operating range. The other 2 will remain idle in Turbo Boost mode to ensure that it meets these requirements.

If you really wanted a full overclock on all 4 cores, you could have bought a Core i5 2500K instead.

 

[dbcooper1]

You should be able to get turbo boost up to 3.8 with single core and 3.6 with all loaded. Mine has been running like that for months with all other settings at default. Not a 2500k but not bad. Good luck.

 

[Maximilian]

With the Core i5 2400, you're only limited to overclocking the Turbo Boost to a certain amount of speed bins above stock. Turbo Boost will not give you an overclock on all 4 cores as it relies on having higher frequencies on 2 cores and to make sure that the power consumption and heat is within its safe operating range. The other 2 will remain idle in Turbo Boost mode to ensure that it meets these requirements.

If you really wanted a full overclock on all 4 cores, you could have bought a Core i5 2500K instead.

It will turbo on all 4 cores to 3.8ghz. Non K CPU's are not fully locked, they are unlocked as far as their turbo allows, which in this case is 38x, setting the main turbo ratio manually in the EFI ignores the 1 core 2 core thing and allows all 4 cores to turbo to that speed.

 

[dma0991]

It will turbo on all 4 cores to 3.8ghz. Non K CPU's are not fully locked, they are unlocked as far as their turbo allows, which in this case is 38x, setting the main turbo ratio manually in the EFI ignores the 1 core 2 core thing and allows all 4 cores to turbo to that speed.

So why exactly OP's setup will only Turbo 2 cores instead of 4? :hmm:

 

[Maximilian]

So why exactly OP's setup will only Turbo 2 cores instead of 4? :hmm:

Because the OP fucked up somewhere? I dunno why ask me lol...

They turbo up on all 4 cores to 3.8ghz, beyond that if you are feeling bold/lucky and wish to screw with the base clock.

http://www.clunk.org.uk/forums/over...-overclocking-guide-beginners.html#post110980

From that guide:
"By All Cores (Can Adjust In OS) - 38"

Plus if my 2400s can do it, the 2400 vanilla can, they're the same chip with different turbo settings and clock speeds.

 

[Puppies04]

Because the OP fucked up somewhere? I dunno why ask me lol...

They turbo up on all 4 cores to 3.8ghz, beyond that if you are feeling bold/lucky and wish to screw with the base clock.

http://www.clunk.org.uk/forums/over...-overclocking-guide-beginners.html#post110980

From that guide:
"By All Cores (Can Adjust In OS) - 38"

Plus if my 2400s can do it, the 2400 vanilla can, they're the same chip with different turbo settings and clock speeds.

Just to be certain are you sure you are hitting 3.8 on all cores, I did a little googling and the general consensus seemed to be that this wasn't possible.

 

[felang]

It will turbo on all 4 cores to 3.8ghz. Non K CPU's are not fully locked, they are unlocked as far as their turbo allows, which in this case is 38x, setting the main turbo ratio manually in the EFI ignores the 1 core 2 core thing and allows all 4 cores to turbo to that speed.

In my experience this is correct, you should have no problem getting to the max turbo ratio or multi allowed for your processor which according to other posters seems to be 38. Combined with a slight BCLK overclock, let´s say 105mhz (not recommended by the way) would be good for 3.99ghz.

Personally I would go for 3.8 and not mess with BCLK, just make sure to give more VCORE as needed up to 1.35V (should need a lot less, for example my 2600k will do 4.5ghz @ 1.275 volts .

Ideally you should increase the offset voltage and not the fixed voltage so that you could maintain lower VCORE at idle.