Cpu vcore doesn't match?

[Elite_toaster]

I was ocing my fx 6300 the other day. I was playing around with the vcore a bit and got it stable on 1.4325 (4.5ghz). when i look in hardware monitor it shows up as 1.428 vcore. is this just a graphical bug or is there something wrong with my power delivery systems on my mobo (asus saber tooth 990fx r.20)??? oh and i'm running a hyper 212.

 

[Novuake]

Its mostly likely a phenomenon called vdroop.
If you provide more info then we can confirm.

Was the lower value 1.428 under max load or what? How did you check stability?
HWmonitor does not report it THAT accurately by the way. CPUz is a bit more reliable.

 

[ihog]

Vdroop. It's normal. Don't worry about that.

 

[NextGenesis88]

Just use CPU-Z. You want to focus on the voltage under load. So run the stress program and monitor CPU-Z. If everything is still stable then that just means your CPU needs less than you thought! For the rig I am on right now, I set 1.26875 in the BIOS with load line calibration set to max and under load I see 1.248v in CPU-Z. The amount of droop will vary from board to board and sometimes it will even increase under load depending on the LLC configuration.

 

[con635]

What causes vdroop? is it a problem? this interests me because I get the same thing with my own rig possibly a bit worse, comparing cpuz to bios settings...

 

[NextGenesis88]

What causes vdroop? is it a problem? this interests me because I get the same thing with my own rig possibly a bit worse, comparing cpuz to bios settings...

It's a design to help a stock processor stay within their rated power outputs. As the load increases the board lowers the voltage to compensate, but when overclocking you usually do not want this because it's good to have a nice steady regulated voltage. Motherboards are equipped with this feature and some are better than others or have more options than others. When overclocking you typically aren't worried with staying with the stock wattage so it doesn't really matter. You don't have to use LLC at lower voltages, but once you start getting to a certain point it really does help out. I use LLC on all my three different socket motherboards at all times.