A-Tech 32GB (4 x 8GB) RAM for Dell XPS 8500, 8700 | DDR3 1600MHz PC3-12800 Non-ECC DIMM Max Memory Upgrade Kit at Amazon.com
DELL Desktop PC XPS 8700 (X8700-1125BLK) Intel Core i5 4460 (3.20GHz) 8GB DDR3 1TB HDD Windows 7 Professional Installed with Windows 8.1 License Included - Newegg.com