Upgraded my computer. RAM worked well in my system. Each kit is 2x2GB.
http://www.newegg.ca/Product/Product...82E16820220286 (memory timing is 7-7-7-20)
http://www.newegg.ca/Product/Product...82E16820220435 (memory timing is 9-9-9-24) - sold
asking $30 for remaining set.