Temp Difference on-die and under-cpu sensors

I've just got an A7V880 and the cpu temp is read from under the socket.
There's no little tape reaching up. My Biostar read the sensor in the cpu.

How much cooler should the under-cpu sensor read than the on-die sensor?

I'm having voltage reading issues, so don't trust the temp reading, and am
trying to establish some sort of ratio.


--
Ed Light

Smiley :-/
MS Smiley :-\

Send spam to the FTC at

Thanks, robots.

"Ed Light" wrote in message
news:v_63d.274119$Lj.134746@fed1read03...
I've just got an A7V880 and the cpu temp is read from under the socket.
There's no little tape reaching up. My Biostar read the sensor in the cpu.

How much cooler should the under-cpu sensor read than the on-die sensor?

I'm having voltage reading issues, so don't trust the temp reading, and am
trying to establish some sort of ratio.

My Soltek board monitors both....on my Barton 2500 @ 2205Mhz at idle it's
39-40C external CPU diode, 45C internal CPU diode. Under heavy load, they're
both up by about 6-7C, and they're still 5-6 degrees apart.

"Ed Light" wrote in message
news:v_63d.274119$Lj.134746@fed1read03...
I've just got an A7V880 and the cpu temp is read from under the socket.
There's no little tape reaching up. My Biostar read the sensor in the cpu.

How much cooler should the under-cpu sensor read than the on-die sensor?

I'm having voltage reading issues, so don't trust the temp reading, and am
trying to establish some sort of ratio.


It's really impossible to say because the reading from the socket diode is
adjusted via a algorithm to approximate on die temperature. If the
adjustment applied is perfect there will be zeo difference between socket
and die temps, however it's rarely perfect.

--
*****Replace 'NOSPAM' with 'btinternet' in the reply address*****

It's really impossible to say because the reading from the socket diode is
adjusted via a algorithm to approximate on die temperature. If the
adjustment applied is perfect there will be zeo difference between socket
and die temps, however it's rarely perfect.

Do you have any link or other info to back this assertion up. Not the part
about the adjustment algorithm, but the part that it's supposed to
compensate for and approximate internal CPU diode temp. Is it not supposed
to give CPU external surface temp?

"BigBadger" wrote in message
...
"Ed Light" wrote in message
news:v_63d.274119$Lj.134746@fed1read03...
I've just got an A7V880 and the cpu temp is read from under the socket.
There's no little tape reaching up. My Biostar read the sensor in the
cpu.

How much cooler should the under-cpu sensor read than the on-die sensor?

I'm having voltage reading issues, so don't trust the temp reading, and
am
trying to establish some sort of ratio.


It's really impossible to say because the reading from the socket diode is
adjusted via a algorithm to approximate on die temperature. If the
adjustment applied is perfect there will be zeo difference between socket
and die temps, however it's rarely perfect.


Oops...should have said socket 'Thermister'
*****Replace 'NOSPAM' with 'btinternet' in the reply address*****

"Augustus" wrote in message
news:bai3d.25430$yW6.1262@clgrps12...
It's really impossible to say because the reading from the socket diode
is adjusted via a algorithm to approximate on die temperature. If the
adjustment applied is perfect there will be zeo difference between socket
and die temps, however it's rarely perfect.

Do you have any link or other info to back this assertion up. Not the part
about the adjustment algorithm, but the part that it's supposed to
compensate for and approximate internal CPU diode temp. Is it not supposed
to give CPU external surface temp?

Internal CPU diode or CPU core external temp, the two should be pretty
close. It does not really matter which the algorithm tries to emulate. The
point I tried to make, is the socket thermister reading is adjusted,
therefore without knowing the exact nature of the adjustment it's impossible
to say what the relationship between internal diode and socket thermister
temperatures is.
--
*****Replace 'NOSPAM' with 'btinternet' in the reply address*****