Full Details from Amazon.com : http://www.amazon.com/gp/product/B00BKEE4IE?tag=onigi-20
CRUCIAL CT2KIT25664AA667 4GB ( 2GB x 2 ) 240-pin DDR2 667mhz Non-ECC 1.8V CL5 Desktop Memory
New - Retail
1-Year Warranty
Crucial CT2KIT25664AA667
CRUCIAL CT2KIT25664AA667 4GB 2GB x 2 240-pin DDR2 667mhz Non-ECC 18V CL5 Desktop Memory Module