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i5 2500K acting wierdly

Hatisherrif

Hatisherrif

Senior member
Hello folks. I'm having a weird thing going on with my i5 I would like someone to diagnose and confirm. I've enabled C-state and C1E in the BIOS to get lower idle temps, and sure as hell, the CPU runs around 5 degrees cooler without load when sitting around 1600MHz, but the voltage is acting weirdly. I have my CPU overclocked to 4.5GHz and I manually set the voltage to 1.315V.

Without power saving features enabled: Vcore never exceeds 1.312V, goes down to 1.304V when doing nothing and then back up under heavy load.

With power saving features enabled: Vcore goes to a max of 1.320V only when the system is absolutely IDLE, and then goes back down to ~1.312V under load!

Are there any features that I could have enabled to cause this? The motherboard is MSI P67A-C43 (B3). I've heard of some vdroop functions but I'm not really sure how to configure them. These power-saving features only seem to work properly with automatic voltages.

EDIT: Also, I should mention I have turbo boost disabled and the CPU not set to APS (active phase switching) but to the other setting I cannot remember.
 
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Xed said:
Have you tried using offset voltage instead of manually setting it?
Click to expand...

Will do!

Edit: My motherboard only has the option to set automatic or manual voltages. No option for offset 😛 On the other hand, the CPU is set to SVID mode instead of APS, and the vdroop control set to "Auto" instead of the only available alternative, low vdroop.

Also, I have PLL overvoltage set to auto.
 
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I think is normal to have a lower voltage under load. I think that with Vdroop you can limit this but is better to leave it in auto. PLL auto is good to. Actually with SB you can basically leave everything in auto except VID and multiplier to OC
 
cantholdanymore said:
I think is normal to have a lower voltage under load. I think that with Vdroop you can limit this but is better to leave it in auto. PLL auto is good to. Actually with SB you can basically leave everything in auto except VID and multiplier to OC
Click to expand...

Lol yeah, but the issue here is that I have a higher IDLE voltage than at load 😀
 
Lower voltage under load is because of vdroop, LLC can address that but all it's doing is adding voltage under load, without offset voltage I don't believe it will drop voltage even at idle.
 
So what is the problem exactly, does your computer crash or blue screen during operation? Or does this behavior just "bug" you? Just curious.
 
GrumpyMan said:
So what is the problem exactly, does your computer crash or blue screen during operation? Or does this behavior just "bug" you? Just curious.
Click to expand...

Meh, I just thought I could be getting better idle temps if the voltage got turned down while the CPU is doing nothing. It was just "bugging" me 🙂
 
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