Product Feature : - • SDR • DDR • DDR 2 • So DIMM Product Specifications :- SDR - Capacity & Frequency: - 128MB SDR 100-133 256MB SDR 100-133 512MB SDR 100-133 DDR - Capacity & Frequency: - 128MB DDR 266-400 256MB DDR 333-400 512MB DDR 333-400 1GB DDR 333-400 2GB DDR 333-400 DDR 2 - Capacity & Frequency: - 256MB DDR2 400-667 512MB DDR2 400-667 1GB DDR2 400-667 DDR 2 - Capacity & Frequency: - 256MB SO DIMM 133-677 512MB SO DIMM 133-667 1GB SO DIMM 133-667 Additional Information :- 50 pcs per carton - Uncover 25 pcs per carton - cover