Vcore flux

[SithSolo1]

Current system:

Enhance ENP-5150GH 500W Rev.2.2
FX-55(san diego) @ stock for now
Artic Freezer 64 w/ fan pluged into the CPU1 mobo header
MSI K8N Neo4 FI w/ latest bios
2x 1gb mushkin redline pc4000
1x 250gb sata HD
1x NEC 3500a dvd-burner
1x 7900GTO @ stock
AMD Cool n Quiet disabled

Now in the bios the Vcore is set to 1.4v but when I check CPU-Z it is fluxing between 1.328 and 1.376 under load with Prime95 running and while idle. I tried setting it to 1.45v(max in bios) and it still fluxes from 1.392 to 1.428. Is this normal and if not what could be causing it?

 

[Navid]

1- Not all CPU-Z versions report the same VCore voltage!
2- This is just an assumption. I have no evidence! VCore set in the BIOS is the voltage provided by the voltage regulator. That voltage is applied to the CPU through a resistor. The real VCore is the voltage that reaches the chip. This I think is intentional to not allow the chip to fry itself if its current goes up. If it does, the voltage drops because of the voltage drop across the resistor so the chip current is kept under control with this simple negative feedback.

 

[SithSolo1]

Originally posted by: Navid
1- Not all CPU-Z versions report the same VCore voltage!
2- This is just an assumption. I have no evidence! VCore set in the BIOS is the voltage provided by the voltage regulator. That voltage is applied to the CPU through a resistor. The real VCore is the voltage that reaches the chip. This I think is intentional to not allow the chip to fry itself if its current goes up. If it does, the voltage drops because of the voltage drop across the resistor so the chip current is kept under control with this simple negative feedback.

heh, learn something new every day.