Sony 15.5" VAIO VPCEE31FX/WI Laptop Notebook PC Processor Type: AMD Athlon II Dual Core P340 Speed: 2.20GHzL2 Cache: 1M Memory Installed: 3GB (2GBx1)+ (1GBx1) Maximum: 8GB Type/Speed: DDR3/1066MH Hard Drive Capacity: 320GB Speed: 5400rpm Type: Serial AT Display Screen Size: 15.5" Resolution: 1366 x 768 Back Light Technology: LE Operating System: Genuine Microsoft Windows 7 Home Premium 64-bit