These strips made me crash the pc when I was trying to play a video. They were associated with two other modules of the same capacity and the same features on asus motherboard p5q longer. Too bad, the price was attractive, perhaps too? Well, I have opted for XMS2 Corsair - Memory - 4 GB: 2 x 2 GB - DIMM 240-pin - DDR2 - 800 MHz / PC2-6400 - C5C - 1.8 V - unbuffered - non-ECC and since it runs Very good! One positive return amazon uneventful, fast and uncomplicated