I'm building a new computer and have found the following options in the BIOS on the "CPU Feature" screen:
- AMD Cool'n'Quiet
- C1E Support
- SVM Support
I understand what "Cool'n'Quiet", and "SVM Support" are, and besides the BIOS and the motherboard manual have decent explanations. (I'm including those option for more context, in case it helps.) However, I'm not familiar with "C1E support". The BIOS has NO help information, and the manual has only the following:
To enable this item to read the CPU power consumption when idle. Not all processors support Enhanced halt state (C1E).
(Transcribed carefully. Both "to" in the first sentence are in the manual. Let's leave speculation about that alone.)
I can see it must have something to do with power consumption at idle/halt, but I'm still not sure what. So far, Google has also been unhelpful (but I'll keep trying). The default setting in the motherboard is Disabled, and I would guess because some processors don't support it, which makes me want more information before experimenting. So...
What is C1E Support?
Also, does my CPU (AMD Athlon II X4 640) support it?
Also, in case it helps, my motherboard is an MSI 870A-G54.