Gigabyte Z68X-UD7-B3 crazy board temps

[Bhench]

Nate,

I have a Gigabyte Z68X-UD7-B3 motherboard and I have been playing with it in my system for a few weeks now but I noticed the temps being reported are a bit odd. When I was overclocking my i7-2600k the temps seemed to be very high at idle but reasonable at full load. With the temps appearing so high at idle I thought I might have gone a bit too hot on my vCore and kept backing down the voltage but then it was unstable. Then I thought maybe I had a bad block mount so I remounted my CPU block on the IHS three times now but same results. I started poking around and noticed the below and now I am wondering if something is messed up with the temp diodes on this board and these values are not actual.

I installed this board in my system that is water cooled with an XSPC RX360 and Swiftech MCR-360 radiators, dual MCP-35x pumps, EK Supreme HF full nickel CPU block. My ambient room temp stays around 23.3C (74F). I took these screen shots with the rig just sitting idle on the desktop and stock clocks and voltage. I took all these screen shots a few minutes apart but the reported temps are all over the map. Trying to figure out if there is an issue and / or which one I should be actually using to figure out my CPU temps.


The PC Status says the CPU is running at 28C which for my set ups seems about right with the fans running very slow. I would expect around a 3 - 5C delta.



However, looking under the MIT at the same time it shows all four cores at 42 - 43C or 53% higher and hotter.



Using a program like real temp it shows the cores are somewhere between 28 - 38



And Open Hardware Monitor shows 27 - 38C.



Wondering if you have any contacts that might know the answer as to why there is such inconsistency from the temp probes and which number is the real measurement.

[DJ Tucker]

your temps are fine. in fact thats good temps. try testing your system in occt power supply test mode as that stresses the system higher than any game would. that way you can tell if your temps are ok or not.

[Bhench]

I have tested the system with Prime 95 and OCCT and the temps stay around 68C with a 4.8GHZ OC. But that is not my problem, the issue is that I am getting different readings from different software and sensors by several degrees C. I am trying to figure out which one I should be paying attention to as the real core temps. 43C is pretty hot for idle btw.

I heard this was a topic at CES during one of the Gigabyte sessions about this board with several people reporting odd temps and frustrated at the lack of fan control from the mobo headers.

Might be time to swap to an ASUS.

[Major_A]

I've read somewhere (don't remember where) that either CoreTemp or RealTemp uses a different algorithm to get the temperatures.

Other software (e.g. CoreTemp, HWMonitor) show different core temperatures than AIDA64. Is it possible to adjust the core temperatures on an Intel CPU to match what other software measure?

Modern Intel processors use DTS on-die temperature sensing diode to provide core temperature measurement. AIDA64 fully complies to the latest Intel DTS Specifications, and uses the TJMax values published by Intel. With DTS the measured core diode temperatures are relative to a TJMax temperature value, which is specific to a particular CPU model & stepping. By adjusting TJMax, it is possible to adjust the measured core temperatures in both directions. The TJMax value AIDA64 uses can be changed in main menu / File / Preferences / Hardware Monitoring.

http://www.aida64.com/support/knowledge-base
#25 on the page.

[Bhench]

Problem resolved!!

I yanked that Gigabyte board and replaced it with an ASUS Maximus IV Extreme-z board and guess what, same ambient of 23C but now it idles at 26C and instead of 38 - 43C and runs 48C at 100% load for 10 minutes instead of 66C after 10 minutes of Prime 95. I lost between 11C and 17C in temp depending on which Gigabyte number we use in idle and 18C at load. That is a massive difference in temps and I remounted that block 4 times on that Gigabyte board.

Have to say I am not a big fan of that UD7 after this experience and add the fact that you cannot control any fan headers and it makes me wonder what is going on with them. FLAKY!