Question Is HWiNFO64 correct on these voltage readings or no?

nialbu91

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May 3, 2018
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View: https://imgur.com/a/ufdcz70


I have the cpu core voltage set to 1.300 and the VCCSA & VCCIO set to 1.220 with the LLC at High. CPU-Z reads the core voltage at 1.320. My question is, why are the voltages so high at the VID readout? I think I have an understanding of what the VID is but maybe I'm wrong.

Temps are well in check at 22C-28C at idle and around 80C under load. Drivers and updates are all up to date as well as the bios.
 

Darkbreeze

Titan
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VID and actual core voltage (Vcore) are two different things.

https://www.overclockers.com/forums/showthread.php/642427-What-s-the-difference-between-Core-Voltage-and-VID?p=6488709&viewfull=1#post6488709


Also, those settings for VCCIO and VCCSA seem, to me, high. Granted, I've not done any overclocking or worked with a 9900k at all yet, but for previous generations in general, even for a relatively high overclock, something more along the lines of .95 to 1.12v depending on the overclock level and hardware.

https://www.tweaktown.com/guides/8481/coffee-lake-overclocking-guide/index5.html


Also, at 5Ghz which is not a particularly large stretch since the all core boost is already 4.7Ghz, I'm not sure that a high LLC is necessary either. I'd try a medium LLC setting, and stability test it. You may be elevating your thermal condition unnecessarily. High or Extreme LLC should usually be reserved for VERY high overclocking conditions where vdroop is definitely creating stability problems. If it is, then it's understandable, but if it's not, or if you don't actually know because you haven't DONE the stability testing with a somewhat lower LLC, then I would start lower and work my way up, as necessary. I wouldn't start high.
 
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rigg42

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I have done extensive overclocking on a 9900k. I agree 100% with Darkbreeze. You have too much LLC and likely too much VCCIO/VCCSA. The later voltages are dependent on the memory kit you are running. I'd doubt you'll need more than 1.1v on either unless running really high memory speeds and/or tight timings. Running LLC that high is dumb IMO. When you transition from a high current load to a low current load you can get voltage spikes high enough to kill your CPU with too much LLC. If you are boosting voltage from what is set in bios in a high current load then you are at risk of doing this. LLC boosts voltage to the CPU to compensate for the voltage droop you get when the CPU starts pulling a lot of current. The problem is it doesn't disengage instantaneously when the CPU stops pulling a lot of current and will cause potentially dangerous momentary voltage spikes if set too high. I usually like to see 10-20 mv of droop between idle and load at reasonable V-core settings and even more if really pushing the safe voltage limits of the CPU. You are better off running the V-core a bit higher and using less LLC IMO. I never went above turbo at 1.3 on that motherboard when I owned it. That should basically keep voltage dead steady between low and high current loads. At 1.3V this should be fine. Assuming you could actually cool more voltage than that I'd lower LLC a step or two so you see a bit of droop between idle and 100% all core load.
 
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