Komputerbay 4GB ( 2 x 2GB ) DDR2 DIMM (240 PIN) AM2 800Mhz PC2 6400 / PC2 6300 FOR ASRock A780FullDisplayPort 4 GB Komputerbay 4GB ( 2 x 2GB ) DDR2 DIMM (240 PIN) AM2 800Mhz PC2 6400 / PC2 6300 FOR ASRock A780FullDisplayPort 4 GB ONLY WORKS ON MOTHERBOARDS WITH AMD PROCESSORS (SOCKET AM2 ,AM2+ AND AM3 PROCESSORS) . Non-ECC Non parity Voltage 1.8V. SUPPORTS DUAL CHANNEL TRIPLE CHANNEL AND QUAD CHANNEL Lifetime Warranty COMPATIBLE WITH ASRock A780FullDisplayPort