Apple Power Mac G5 Desktop M9591LL/A (Dual 2.3 GHz PowerPC G5, 512 MB RAM, 250 GB Hard Drive, Double-Layer SuperDrive) (Discontinued by Manufacturer) Dual-core 2.3 GHz PowerPC G5 processor with 1.15 GHz bus 512 MB RAM expandable up to 16 GB, 250 GB hard drive, 16x Double-Layer SuperDrive NVIDIA GeForce 6600 with 256 MB of GDDR SDRAM graphics One FireWire 800 port, two FireWire 400 ports (one on front), four USB 2.0 ports (one on front), and two USB 1.1 (on keyboard) Software includes Mac OS X, Spotlight, Dashboard, Mail, iChat AV, Safari, Address Book, QuickTime, iLife, and more