Kingston KVR800D2N5/512 512MB DDR2-800 PC2-6400 CL5 Memory.

Detail Specifications
Module Size - 512B
Form Factor - DIMM 240-pin
Feature - DDR2 PC2-6400
Memory Timings - CL5
Standard 64M X 64 Non-ECC 800MHz 240-pin Unbuffered DIMM (SDRAM-DDR2, 1.8V, CL5, FBGA, Gold)
Speed - DDR2-800
Supports socket AM2
800-MHz DDR2 ValueRAM Features -
-Tested at 800 MHz
-1.8 Volts operation, delivering 50percent less power usage.
-Memory signal termination inside the memory chip to prevent reflected signal transmission errors.
-CAS Latency 5