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i7 12700f multi-core is under performing

Boomstick777

Boomstick777

Boomstick777

Soldato
Joined
2 Jan 2012
Posts
12,100
Location
UK.
Hey guys, just installed an i7 12700f into an n50 - 640 Acer pre build system. The single core performance seems great but multicore is down quite a bit from where it should be. Could this be a hardware power limitation? Or could there be something else happening?

Temps never go past around 50c.



 
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Armageus said:
Depends on what motherboard you have?

May just be a BIOS setting to raise the VRM Current Limit


www.intel.com

Current /EDP Limit Throttling and Power Limit Throttling Indicators...

Explains meaning and settings for Current/EDP (Electrical Design Point) Limit Throttling and the Power Limit Throttling indicators in the Intel® Extreme Tuning Utility
www.intel.com www.intel.com
Click to expand...

Thanks, yeah the mobo is really limited in BIOS options. It's one of those Acer pre build PCs, think the mobo is a cutom b660, the only options I can see in BIOS are basics boot order, turn of VMD etc. nothing that would unlock more juice from what I can see. Maybe it's aggressive on keeping the power use low?

Single core seems fine, just that multi-core performance is down.
 
Armageus said:
Likely the VRM just isn't up to the job of delivering enough power and so the BIOS is limited to protect it.

Unfortunately nothing will work round that - either live with it or replace the motherboard :(
Click to expand...

That makes sense, yeah I was worried it was some kind of config issue, so was trying to correct it. If it's a hardware limitation I will just have to make do lol.
 
Armageus said:
Not sure why people are focusing on VRM temperatures? Surely the OPs XTU Screenshot would say "Motherboard VR Thermal" rather than "Current/EDP Limit".

Current/EDP Limit suggest it's hit a preset limit rather than a physical limit e.g. temperature
Click to expand...

Yes I think your right, all the temps etc are actually incredibly low. Impressive really for such a small PC with an Thermalright Assassin. Like you mentioned I believe it throttles even when temps are ok, based on power consumption or voltage. PC only has a 500w PSU.

The PC performs great, that multi-core score had me a lil worried that maybe something was wrong, but single core is great. Played some Alan Wake 2 on this machine yesterday, performance was great. I think I will just live with the power limitation, if it keeps consumption low maybe not a bad thing.
 
Wing-Man said:
have you tried to undervolt the CPU in bios?

if you pump less in your would still hit the throttle limit, but with more performance
Click to expand...

No options unfortunately, just the generic OEM locked down BIOS things. I can live with it's limitations now I know it's not a fault or something if that makes sense.

Will be interesting to see if these are upgradable to 13th and 14th gen though, I would like to able to throw in an i7 13790F in the future. Will see what ACER say.
 
Side note >> i7 12700f is on the PC's upgrade compatibility list..

With regard to headroom, even with PL1 and PL2 limits set to unlimited, CPU behavior is still the same. PL4 is set to 130.0 W.

i7-12700f.png
 
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