Dell Studio XPS 7100 Athlon II X4 640 3.0GHz 4GB 1TB DVD&plusmn;RW Windows 7 Home Premium Mini-Tower w/HDMI Dell Studio XPS 7100 Athlon II X4 640 3.0 GHz Mini-Tower PC General Features: Mini-Tower Microsoft Windows 7 Home Premium 64-bit pre-installed w/CoA and reinstallation partition AMD Athlon II X4 640 3.0 GHz quad-core processor 4 x 512 KB L2 cache, 4 x 128 KB L1 cache, Socket AM3, 45 nm SOI, 95 W, 1.05 ~ 1.4V 4 GB DDR3 SDRAM 1333 MHz (supports up to 16 GB)