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COMPATIBILITY BETWEEN RAM AND CPU COOLER help please

Yes, there will be a ram clearance issue.
If you are using only two sticks of ram, there will be a preferred or required pair of slots in which to install the ram.
Check the motherboard manual.
Since the vengeance has tall heat spreaders, expect a problem.
You may have to omit the front fan or relocate it to the rear.

As an alternative, I suggest the noctua NH-D15s which will not have that problem and it is a bit cheaper too.
The s variants are high compatibility versions which clear tall ram and are also offset to clear graphics cards mounted in the first pciex16 slot.
 

what if i use this one instead G.Skill - Trident Z RGB 8gbx2 16GB? And yes i'm planning on only using 2 slots
 

The noctua was my first choice.. until I saw how it looks. I chose the dark rock pro 4 because it has a good performance and it looks good in the black/red theme I'm going for. Is it hard to relocate the fan to the back and what are the cons of doing so?