PNY XLR8 4 GB (2 x 2 GB) DDR3 1600MHz PC3-12800 CAS 8 Desktop DIMM Memory Kit MD4096KD3-1600-X8 Warranty Terms - Parts - Lifetime Warranty Terms - Labor - Lifetime Memory Size - 4GB Speed - 1600MHz CAS 8 Pin Configuration - 240-pin DIMM