I wanna do ram overclock. It's just that the gap between them are so narrow.

I wanna put a 120mm fan on top of the modules but I'm afraid that the air gets blocked by the heatsinks.

Would taking off the heatsinks help with better cooling?

p.s. it's a secondhand ram I bought off ebay.

So NO WARRANTY for me

Also, see the image. It's 4 sticks. (I'm out on a trip so this is an edit made to resemble my pc as close as possible)