DutchMike :
Preferably air, since I want assurances that it works when it arrives
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That always is a good thing isn't it, if it works
think I'd still go 212 EVO and a second choice might be the Hyper N520, both are reasonable costwise and are right there with the Noctua and many of the bigger more expensive ones - also the 212 EVO has adjustable fans so fully populating your DRAM slots isn't a problem