Currently I have two Corsair XMS3 1333Mhz DDR3 RAM sticks installed in dual-channel memory mode. The M5A99FX board that I own only supports dual channel, so triple channel is out of the question. My main question is this: Am I going to see any difference whatsoever if I buy some Corsair Dominator DDR3 2133Mhz sticks to replace my current ones, or would it just be better spent elsewhere? Also, as a side note, I recently purchased a Sapphire Tri-X R9 290 (OC) graphics card. I'm not sure if it is being held back by my FX 6300. If it is, any processor recommendations that can handle it and are under 400 dollars would be greatly appreciated. I don't care about Intel vs. AMD because except for my motherboard, everything else I have is compatible (which means if you suggest Intel, it wouldn't hurt to suggest a motherboard under 200 that has a USB 3.0 header for my case). Thanks for reading and helping my solve my problem