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Nehalem vs Westmere Fan Noise

I've had 3 Mac Pro 2009 2.26 8 core. All have fan noise at BoostA and BoostB as per IStat, reving at over 5000 rpm's. I've had 2 Westmere 2.4 12 core. No fan noise. I am wondering if it's a difference in the CPU's. The Nehalem CPU's have no heat caps or spreaders and the Westmere do have the caps.

Does anyone out there have an opinion on this? Thanks

最後更新：2017-09-19 00:08:11

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