as some of you may know, the P55 chipset's CPU sockets are very close to the RAM slots; as seen below:
my Noctua U12P ((L)126mm X (W)71mm X (H)158mm) will not fit with all 4 RAM slots occupied.
currently considering the Prolimatech Armageddon ((L)144mm X (W)50mm X (H)160.3mm with a 140mm fan mounted, the fan protrudes from the heatsink
), but I am worried that it might be too tall for my case (Lian Li PC-7FW)
also the Thermalright HR-01 Plus (L110 x W60 x H159.5 mm), but not sure it's thin enough.
(**** it, the U12P is the heatsink I liked the most.)