There is not alot of difference between Ram models, maybe just the CAS latency, nothing to worry about. 16gb is more than enough. 32gb is for workstation computers, like 3D Modelers, and CGI Visualizers. 32 is a waste on a Gaming PC like Richie said. You can also check out Corsair LPX sticks, which are higher quality, and Trident Z RGB which is getting cheap. You also want 3000mhz for ram, or just plain old 2666.