Product information: 1GB DDR2 XMS2-5400 Pro TwinX (2x512MB)The TWIN2X1024-5400C4PRO is a 1024 MByte matched pair of DDR2 SDRAM DIMMs. This part delivers outstanding performance in the latest generation of DDR2-based motherboards. It has been tested extensively in multiple DDR2 motherboards to ensure compatibility and performance at its rated speed. This memory has been verified to operate at 675MHz at the low latencies of 4-4-4-12. All XMS2 PRO Series modules include the platinum-colored high-efficiency aluminum XMS2 heatsink, and 24 activity LED’s that show the level of memory activity on each bank.