800 MHz can be compatible with DDR 2 667MHz / 533MHz Memory chip:16IC Type: DDR2 DIMM Memory Channel: Dual Channel Function: Non-ECC Color: Green Material: PCB Memory Socket: Long--DIMM Frequency:800MHz Number of Pins: 240pin Capacity:4GB Voltage:1.8V DDR2 type: PC2-4200 = DDR2 533MHZ PC2-5300 = DDR2 667MHZ PC2-6400 = DDR2 800MHZ (Compatible with DDR2 667MHZ, DDR2 533MHZ) Please note: this memory is just for AMD motherboard, it does not fit Intel motherboard or ECC Server .Model Desktop DDR2 4GB 800MHz. The appearance and color of different batches of products may be different, which will not affect the use Package Contents: 1 x RAM 2 x Cooling Vest(Random colors and appearances Do not accept designation) 2 x Sticker(Random colors and appearances Do not accept designation) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.