The fifth-generation Xserve is packed with features designed to meet your needs. Powered by the dual-core Intel “Woodcrest” Xeon processor running at up to 3.0GHz, this quad-core 64-bit system delivers performance up to 5 times (1) faster than the Xserve G5. (This Description is from www.apple.com) MA510G/A Compatible 1GB 667MHz DDR2 FB DIMM KIT $180.00 MA509G/A Compatible 2GB DDR2 667MHz FB DIMM KIT $120.00 MA508G/A Compatible 4GB DDR2 667MHz FB DIMM KIT $200.00 MA507G/A Compatible 8GB DDR2 667MHz FB DIMM KIT Regular price: $1,250.00 Sale price: $1,050.00