Kingston Technology ValueRAM 16GB 1333MHz DDR3 Non-ECC CL9 DIMM (Kit of 4) STD Height 30mm Desktop Memory 16 (PC3 10600) KVR1333D3N9HK4/16G Four 4GB modules of 1333MHz DDR3 Memory Specifically designed and tested for compatibility in various devices 240-pin Unbuffered DIMM From the industry leader in PC Memory Backed by a lifetime warranty and free technical support