Komputerbay 8GB (4x 2GB) DDR3 DIMM 240 Pin 1600MHz PC3-12800 for ASRock P43Twins1600 8 GB Komputerbay 8GB (4x 2GB) DDR3 DIMM 240 Pin 1600MHz PC3-12800 for ASRock P43Twins1600 8 GB Well Tested. Non-ECC Non parity Voltage 1.5V. COMES WITH HEAT SPREADERS. SUPPORTS DUAL CHANNEL TRIPLE CHANNEL AND QUAD CHANNEL Lifetime Warranty COMPATIBLE WITH ASRock P43Twins1600