I'm currently running Vista 32bit and OS X 10.5.7 on my rig. And I want to upgrade to 8GB of RAM. I know my mobo supports 16GB of RAM so I'm good there. I currently have OCZ's Reaper HPC Edition 4GB (2 x 2GB) DDR2 800. I was wondering if I should buy another 4GB OCZ's Reaper HPC Edition kit or should I get some faster Ram say 8GB of DDR2 1066. I'll be reinstalling Vista 64bit soon and I'll be testing Windows 7 64bit. I play games like FarCry 2 and Crysis. And I have Parallels installed on my Hacintosh and I'm running Windows 7 on it. Thanks for the help.