Glad to hear the fan/heat sink is working well (relatively quiet and cool). However, I understand you would like lower temps. The MF014 is our standard cooler we do offer a version with a higher CFM fan ( w/o too much of a noise increase - 27CFM 38 DB-A).
Then again, your temps may be effected by the case environment (as discussed above) or by the way the temperature is being determined. How are you getting your cpu temps? Sometimes the motherboard temp readings are not very accurate.
Problem is that when we test a cooler, we drill a hole through the base and place sensors in the heat sink and at various spots (according to AMD protocol) in order to get an accurate reading of temperatures. Well it is not realistic to do this in your personal set-up so you have to work with the data you can get.
In general, you should be able to get temperatures down, but of course the trade off is noise and money. You just have to consider if your set up is running well and within the operating temps of the processor.
Also note, most companies in thermal management and the cpu manufactures use Shin Etsu thermal grease when we decide to use a grease material (usually a bit better performance than a phase change material). We generally do not use this material on open die chips, but if we do, it is a non-conductive Shin Etsu material. I do not know whether Artic Silver is conductive or not, but you want to avoid anything conductive coming in contact with the substrate of the chip (which may have electrical contacts).
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