Kingston 3GB 1333MHz DDR3 ECC CL9 DIMM (Kit of 3) w/TS (KVR1333D3E9SK3/3G) 3GB 1333MHz DDR3 ECC CL9 DIMM (Kit of 3) with Ther computer-memory 2GB 1600MHz Kit DDR3 OCZ3P16002GK