Full Details from Amazon.com : http://www.amazon.com/gp/product/B0032CJPA4?tag=onigi-20

Komputerbay 4GB ( 2 x 2GB ) DDR2 DIMM (240 PIN) AM2 800Mhz PC2 6400 / PC2 6300 FOR Asus M3N78-VM

Komputerbay 4GB 2 x 2GB DDR2 DIMM 240 PIN AM2 800Mhz PC2 6400 PC2 6300 FOR Asus M3N78-VM 4 GB
ONLY WORKS ON MOTHERBOARDS WITH AMD PROCESSORS SOCKET AM2 AM2 AND AM3 PROCESSORS Non-ECC Non parity
Voltage 18V SUPPORTS DUAL CHANNEL TRIPLE CHANNEL AND QUAD CHANNEL
Lifetime Warranty
COMPATIBLE WITH Asus M3N78-VM