Haven't pulled the trigger on a new system yet, still thinking of upgrading old. Trouble is, cost is almost the same on both, thanks to TigerDirect's CPU/MOBO combo today. It's an AMD FX-8320 and a GB GA-970A-DS3P MOBO. Yesterday I was thinking of upgrading my AMD Athlon II X4 635 processor on a GB MA74GM-S2 MOBO to the Athlon X4 750K on a ASRock FM2A88X MOBO. My current system only supports DDR2, so I pretty much have to have a different MOBO anyway. The FX-8320 is an 8-core, more is better, right? Will I be able to keep my OEM OS (WIN7) or must I get another one?