Just wanted to mention in case anyone else with a 2009 MP is on the fence about a CPU upgrade, I just did one on mine last night. Installed a W3680 hex-core CPU, and it honestly could not have been easier. I've built and worked with PC's for a long time, and this was easier than a CPU install on any PC motherboard I've worked with. The heatsink has guides so you know right away that you put it in the right position before you start tightening screws, something which rarely happens on a PC. Very very smooth process and running great. I highly recommend the upgrade!