if you're using 2 sticks you need to alternate slots, but yes 2 and 4 can be used in place of 1 and 3 to give more clearance.
Dear Sir, I will have Fx-8350 on M5A99fx PRO R2.0. I want to have 32 gb of ram. Will Hyper 212 evo give enough clearance to ram as i want to insert 32gb of ram (4 sticks X 8gb DDR3 ram) ?
Also, can you suggest me any good cabinet as i want to have gtx 970 sli along with power supply ?
Thanks in advance !