I think the question is more along the lines of "how can the CPU temperature be lower than room temperature"?.
I wouldn't expect the CPU temp to be lower than room temperature. It that were the case I would suspect something wrong.
You're cooling the CPU with air aspirated from the room, it cannot magically give temperatures significantly cooler than what the air you're cooling with is at (maybe by a few degrees due to the fooling factor of moving air, but not by ~10°C, at least I wouldn't think so.

That said, I'm using the Enermax Liqtech TR4 360 AIO water cooler too, a high performance cooling solution, stock CPU speed (no CPU overclocking), and get idle temps of 30 to 32°C with room temperature of 25°C, which makes sense and is the best temps I ever had with any previous build.
I'm on BIOS 0801 myself too, so this may not be a BIOS issue, as my temps appear normal to me.

leyabe wrote:
I think the question is more along the lines of "how can the CPU temperature be lower than room temperature"?.
I wouldn't expect the CPU temp to be lower than room temperature. It that were the case I would suspect something wrong.
You're cooling the CPU with air aspirated from the room, it cannot magically give temperatures significantly cooler than what the air you're cooling with is at (maybe by a few degrees due to the fooling factor of moving air, but not by ~10°C, at least I wouldn't think so.

That said, I'm using the Enermax Liqtech TR4 360 AIO water cooler too, a high performance cooling solution, stock CPU speed (no CPU overclocking), and get idle temps of 30 to 32°C with room temperature of 25°C, which makes sense and is the best temps I ever had with any previous build.
I'm on BIOS 0801 myself too, so this may not be a BIOS issue, as my temps appear normal to me.

Would you mind overclocking to 4 GHz to see if the problem is with the overclocking?

I tried at 4GHZ and it didn't change anything for me. Well it did increase my idle temps by a few degrees as I expected, but no other change.

vpkb1998 wrote:
I get the same result with idle/load, and have the same setup. Although, my voltage is 1.395/1.4 using the 4Ghz profile.

I have the same results with 0803 and the 4Ghz OC Profile. The CPU temperatures have suddenly dropped approx. 10 C after loading the 4Ghz profile. So.. How can that happen unless they are fudging a calibration formula in the BIOS to suit their needs? This is frustrating. What is the real CPU temperature??

When running under some load (approx. 60w CPU Power), My CPU temp is 29C and water temp is 28C. Great numbers if you are foolish enough to believe it. 🙂

Under a bit larger load and slightly higher room temps, I see my CPU temps sitting slightly below water temperature! I seriously doubt that. This is regular water; not magic water.

So my question is how and why is this changing!? ..and how do I get an accurate CPU temperature measurement?

gupsterg wrote:
Are you using latest OLED FW? (links in here)

I am. My bios is 0701 though. I didn't know about the 0801 beta release. I'll update it this evening.

Right now my CPU is 17C, water temp. is 27C, and ambient temp is 20.5C. lol This is when it's the furthest out of whack; cold under no load.

Regards,
Travis