What in the world is an AUX temperature?

BigChickenJim

Senior member
Jul 1, 2013
239
0
0
Hi, all. I've been using HWMonitor to keep track of my temps for as long as I can remember. It's always had some inaccuracies, but I've usually been able to compensate. However, I recently started overclocking my FX-6300 and this has obviously necessitated a closer look at my temps. To do that I downloaded HWInfo64, which is a great program.

The thing is, the second temperature listed in HWMonitor (TMPIN1) has always been a mystery to me. I've been operating under the assumption that it is the CPU socket temp since it tends to idle at about 38C (10C higher than BIOS CPU temp) and rises quickly under Prime95 testing. It is consistently one of if not the hottest temp reading in my computer. It's not uncommon for me to see it pass 60C under load and it idles around 10C higher than any other component. I've always written that off since socket temps are always higher than chip temps and usually don't mean much. Now, though, HWInfo has thrown me off because it reports the temperature as AUX. The mobo and CPU temps are reported separately and correspond to TMPIN0 and TMPIN2 in HWMonitor, so it's not either of those.

What the hell is an AUX temp? I've never even heard a reference to such a thing. Is it a VRM monitoring diode (that would actually be nice)? Is it a PSU monitor? Is it a phantom reading that I should ignore? I've seen all of these explanations put forward as answers in my Google quest so far. Does anyone here know what it is? Someone must, right?
 

Sheep221

Golden Member
Oct 28, 2012
1,843
27
81
AUX is anomaly most of the time, sometimes it displays temps for chipset or RAM even. But it is not really a big deal since it won't interfere with your overclocking.
My AUX temp is 26C, and my case fan is labeled as AUXFANIN2 in HWMonitor.
 

BigChickenJim

Senior member
Jul 1, 2013
239
0
0
The only reason I'm not inclined to write it off as an anomaly is that it seems to scale predictably with load percentages. I just want to know what it is since it gets so hot compared to other components (other than the GPUs, obviously). Well, that and I'm an illogically curious madman.

I hadn't considered the fact that it could be a RAM diode. That's a good point, especially since the temps rise quickly in Prime95 blend tests. The temps seem a little high for RAM at stock, though.

Edit: Out of curiosity, do you know what the 1d/1t temp corresponds to? I've always assumed that was a RAM-related temp.
 
Last edited:

Sheep221

Golden Member
Oct 28, 2012
1,843
27
81
Well it is definitely reading some temp sensor, the problem is it is not mentioned which one, I just recommend to just open the case and check by hand all chips you might be concerned about. The reason why this occurs is probably program algorithms looking to match with their respective sensors, seems AUX is universal and matches with any AUX labeled sensor in the computer, since this measurement is not standardized, it is mess to determine it correctly.
 

BigChickenJim

Senior member
Jul 1, 2013
239
0
0
I'm a little scared of the old finger test due to a previous experience. Once bitten...

I guess I could buy an IR thermometer, but I'm not quite that worried. I've had no stability issues and 60-65 is well within the tolerances for most NBs and VRMs, which is what I think this temp must be measuring.