Fast and reliable.
Review by confirmed purchaser
Initially installed both of the new 4Gb sticks into the two available slots, computer wouldn't start. Removed both and re-installed old ram 2x 2Gb, computer started. Removed both 2Gb and installed just one of the new 4Gb sticks this time the computer started. Turned off comp and installed other new 4Gb stick computer started, 8Gb installed. All is well.