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#11
Your CPU temps look high UNLESS the processor is under load.
My CPU temps at idle are about 10 degrees above ambient with a stock heatsink and fan much less efficient than yours.
You don't need much thermal paste. But getting a solid mount can be difficult.
On an Intel machine, you typically would use a spot of thermal paste about the size of a grain of rice. Don't cover the entire surface. Go to Arcticsilver.com and look at the instructions for your processor.