I just bought a Optiplex XE and after looking around on the forums i came upon this post. In the post the dell employee states that 3 of the 4 CPU's are dual core, but the bottom one N1MFN Xeon Westmere X5650, 2.66/6.4GHz, 12MB, 95W, 6C" says it's a 6-core CPU. Can i really use a 6-core CPU in this machine. If so that would be awesome, but i'm skeptical. http://en.community.dell.com/support-forums/desktop/f/3514/t/19684388