Calculation of VID for Ivy Bridge?
Posted: Wed Apr 24, 2013 10:26 am
Can you explain how the VID value in CoreTemp is being calculated for an Ivy Bridge processor?
Searching the forums, I've found one post that states that the "i3/5/7 series do not report VID anymore", but this way back in 2010 and things may have changed since then.
Since the value is actually displayed for Ivy Bridge, there may be two ways to get that information, which is a) it is read directly from the CPU's VID table and provided "as-is", and therefore represents the "true" VID the chip would request from the motherboard if no offset value was entered.
Or b) the CPU does not provide a way to access its internal VID table entries, and therefore the VID displayed is just a function of the motherboard's Vcore value (by some clever logic to account for offset, Vdrop and Vdroop).
I've done some tests with changing the offset values and noting down the VID values, but the results were a bit inconclusive (and I've lost the spreadsheet during a crash in such a session *grrrr*), so I'd really appreciate if you could help me out here.
Searching the forums, I've found one post that states that the "i3/5/7 series do not report VID anymore", but this way back in 2010 and things may have changed since then.
Since the value is actually displayed for Ivy Bridge, there may be two ways to get that information, which is a) it is read directly from the CPU's VID table and provided "as-is", and therefore represents the "true" VID the chip would request from the motherboard if no offset value was entered.
Or b) the CPU does not provide a way to access its internal VID table entries, and therefore the VID displayed is just a function of the motherboard's Vcore value (by some clever logic to account for offset, Vdrop and Vdroop).
I've done some tests with changing the offset values and noting down the VID values, but the results were a bit inconclusive (and I've lost the spreadsheet during a crash in such a session *grrrr*), so I'd really appreciate if you could help me out here.