Wanted to say thanks to ctmpkmlec4 for selling me this CPU upgrade he had sitting around. Anyway, this job was about three hours to rip apart the Cube and install a fan then the processor. I ended up removing 95% of anything attached which was a major pain but it all worked out. This project is a major pain in the ass, and you'll only want to do it once! The nice thing is pretty much every screw is a T9 torx. The worst part was trying to make the fan connector work with the port on the VRM board which unfortunately I broke, not to worry I just tapped into the 12v/ground line on the hard drive/optical drive wire. Runs great and the startup speed compared to before is quite impressive, even other programs in OS X are much more responsive. TFF is much happier and doesn't lag nearly as much as it used to! I wish I geekbenched it with the 500MHz but too late now. I will however geekbench it in a bit and compare it to my 466MHz Digital Audio.