[SOLVED] i5 8600k overclocking on AsRock Z370 Pro4 -> VID is still the same?

[piranha1988]

Hi,
I've been using my pc with this configuration for a while, now I finally have some time to look for overclocking option. Bios on AsRock z370 pro 4 is v 3.10.

Power limit options were left on "Auto".

I did following steps:
CPU configuration
- changed cpu ration to All core option
- changed All Core option to 45
- changed AVX ratio offset to 2

Testing with Prime 95 all good, HWMonitor showed 1.425 VID when running test, so I decided to lower voltage a little in order to get temperature down and to decrease power consumption.

So I did following changes to Voltage Configuration:
- CPU Core/Cache Voltage to offset mode
- Set Offset Voltage to -100

I ran Prime 95 once again to test stability, all good temps went down, power consumption also went down a little, but HWMonitor still shows 1.425 VID when running test.

Now I am little bit confused, because I applied a negative offset, so why VID is still the same?

I am cooling with air using CM hyper 212. I am looking for a decent overclocking, something like "sweet spot" between what games can benefit from and with as lower power consumption as possible. And of course, I do not need to run CPU on that 4.5 clock when browsing internet or watching videos.

There are also other options which I left enabled:
-Intel speed step technology
-Intel Turbo Boost technology
-Intel Speed Shift technology
Is it ok?

Are here any users with same combo so we could compare settings with?

Thanks in advance

 

[Darkbreeze]

VID is not the same as vCORE or core voltage. They are totally different sensors, specifications and while they have a relationship they are not necessarily holding hands.

 

[rodolphe.viard]

Hi piranha1988,

The VID is what the tension that the CPU is asking for. But this tension is always a bit higher than what is needs (at stock and mild overclock).

Don't bother with the VID, just focus on the real VCore. That's the important reading you need to make.


Rodolphe.

 

[Darkbreeze]

Actually, VID is usually LOWER than the actual vCore. Especially if you are overclocking and are under a load. It also depends heavily on how much vdroop you have, what your load line calibration is set to (If your board even has this feature, which for overclocking boards they usually do) and what the clock speed is currently at plus whether or not power saving features are enabled.

VID (Voltage Identifier) = Voltage Level "request" by the CPU to the motherboard's VR (voltage regulator) to supply it, this is initialized by the CPU and can change accordingly if the CPU is in power saving mode like C1E/EIST features, and also each CPU has an unique max VID internally that was set at factory level while they're running at full load. Turning off power saving features like C1E/EIST will overide and disable those feature and the cpu's VID will be permanently set at their max.

VCore = Actual voltage "delivered/supplied" by the mobo to the cpu, this could be automatic from the cpu as the function of C1E/EIST features ... or ... it was manually set and override by user like in OCing, and this "manually set" vcore could be higher/lower than the cpu's VID at mobo with oc-ing capability.

About the voltage reading, VID is just a state or information that is in the CPU, while vcore is the actual voltage, and as usual, software based reading on vcore is not very accurate, expecting +/-10 to 20% off for normal condition.