techPowerUp! Forums - View Single Post - CPU Temperature Monitors Only Go To -13C?

mmoeller · Jul 15, 2010, 01:08 PM

Thank you for the report (PM). I have taken a look why the Open Hardware Monitor does not display anything in this case.

It also reads a TjMax = 99°C from the MSR.

The 7-bit value of the Distance to TjMax is 0x70 in hex, or 112 in decimal (read from IA32_THERM_STATUS MSR). This would give also a temperature of 99 - 112 = -13°C

But the "Reading Valid" bit is not set in your case in the IA32_THERM_STATUS MSR. Thats why no value is displayed in the Open Hardware Monitor.

So I think this -13°C value has no meaning (or I read the documentation wrong).

At "normal" temperatures the Open Hardware Monitor should display a core temperature value on your CPU.

Jul 15, 2010, 01:08 PM	#15
mmoeller Open Hardware Monitor Author Join Date: May 2010 Posts: 8 (0.01/day) Thanks: 0 Thanked 6 Times in 6 Posts	Thank you for the report (PM). I have taken a look why the Open Hardware Monitor does not display anything in this case. It also reads a TjMax = 99°C from the MSR. The 7-bit value of the Distance to TjMax is 0x70 in hex, or 112 in decimal (read from IA32_THERM_STATUS MSR). This would give also a temperature of 99 - 112 = -13°C But the "Reading Valid" bit is not set in your case in the IA32_THERM_STATUS MSR. Thats why no value is displayed in the Open Hardware Monitor. So I think this -13°C value has no meaning (or I read the documentation wrong). At "normal" temperatures the Open Hardware Monitor should display a core temperature value on your CPU.