2x 2.66 GHz Quad Core Intel Xeon Processors 12GB RAM 2x 640GB HDDs NVIDIA GeForce GT 120 512 MB I've been unable to re-install El Capitan, which is the latest version of MacOS compatible with this computer. Computer was working just fine before I wiped the hard drive. I'm sure someone tech savy can make it work again or use the components for another build. Delivery is available