Would the Cooler Master 212 Evo on an ASRock Extreme3 Gen3 mobo allow enough clearing to use all 4 memory slots? If not I was thinking of using a slimline 120mm fan instead of the stock, would ths even work? I'm getting tired of buying heatsinks that overlap if you know what I mean.
That depends of your RAM, if it'w low profile you can install it without problems but if it's high profile you will have problems.
Do you know what the measurements are of space under the 212 Evo? I ditched the Corsair Vengeance because I knew I would get this problem eventually and I thought of using G-Skill which is recommended highly, according to what I can find out:
I have a setup like the OP and moderately tall RAM G.SKILL Ripjaws X Series 8GB (4 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9Q-8GBXL I believe I have 0.125" clearance. I actually measured it.
It fits under the heat sink barely but it can be uninstalled/installed without removing the Hper 212. Since the HSF is spring loaded on the front of the MB, there's just enough to move the heat sink slightly upward enough to slide the Ram underneath. After that, seating it is no problem. That pic from Naota looks about right.
i have the same MB and same cooler on another build. I have corsair vengence 16gb ram and they are pretty huge. I just slid up the fan very little but everything fits in fine. The heatsink on one of the ram dimms touches the fan but is so slight it doesn't even cause any vibration or problems. PLus gets the air flowing across the ram sticks to cool them down.
i also have problems with this i have a 212 evo and gskill sniper 1866 , my fan wouldn't clear my ram so my fan is slid up the heatsink about 1/4 inch to barley clear the ram, it confuses me because every one told me that low profile ram would fit under it