Accuracy of UEFI temperature measurements?

[Deleted]

So as the title reads; Generally how accurate are the UEFI measurements compared to 3rd party software(Real Temp/Core Temp/Speed Fan etc)?

The reason I ask this is because my Z87-G45's UEFI reports a 10-15°c difference compared to Core Temp and Real Temp which both pretty much agrees about their measurements. Screens below are all Idle@stock speed.

UEFI: http://i.imgur.com/xgOf978.jpg
Core Temp: http://i.imgur.com/vODTeOj.png
Speed Fan: http://i.imgur.com/9oexQLO.png

You see the differences? I just don't know which one to trust and use as reference when clocking.
Speed Fan is a bit drunk it seems. Must be measuring the inside of it's ass.

[vesseblah]

BIOS/UEFI should be always 100% accurate, and for example in the pictures above the 10C disrepancy comes from the little fact that on Windows desktop CoreTemp shows you idle at 8x speed while in BIOS all power savings are off and the CPU is running at maxed out 34x multiplier.

[Deleted]

BIOS/UEFI should be always 100% accurate, and for example in the pictures above the 10C disrepancy comes from the little fact that on Windows desktop CoreTemp shows you idle at 8x speed while in BIOS all power savings are off and the CPU is running at maxed out 34x multiplier.

Fuck, that's true. Didn't notice that at all. Thanks