Very happy with my cooler. Installed easily and fit perfectly. Also, the thermal paste was already on the cooler too. Nice touch and the product was exactly as described. I wasn't aware that there were two LGA2011 form factors, until my first heat sink wouldn't fit between my RAM slots. This is the narrower unit, and squeezes in perfectly. Lesson learnt, if you are using a SuperMicro Motherboard that requires a narrow Socket 2011 passive cooler, this is it. It fits and will cool as expected.
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