I'm currently making my first build for gaming but I already have some of the pieces from upgrading the prebuilt machine we have. I currently have the power supply, graphics card, and RAM. Since I already own these I am planning to build around them. The RAM I have is DDR3. I know one of the reasons to get a 6600 is for the DDR4 but I'm trying to save as much money as possible. Since they are about the same price, would it be better to get a 6600 or 4690 with the RAM I have?