8GB KIT (2 x 4GB) For HP-Compaq HP Pavilion Desktop P6530f P6530fr P6530in P6530it P6530kr P6530ru P6530uk P6531c P6531de P6531p P6532de P6532f P6532it P6533w P6534ch P6534f P6535a P6535ch P6536f P6537c P6538d P6540br P6540ch P6540de P6540f P6540fr P6540la P6540ru P6540sc P6540uk P6540y P6541fr P6542f P6542fr P6545a P6545d P6545es P6547c P6547ch P6548sc P6550jp P6550nl P6550pt P6550sc. DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. 8GB KIT (2 x 4GB) DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For HP-Compaq HP Pavilion Desktop. (See Compatibility List Below)