Interestingly the A-Data ram I have is DDR-2 667 when I run it at DDR-400 I have better results with Memtest86. Also the ratings at that speed at 5-3-3-9 I think but the full speed is like the Ballistix of 5-5-5-15. I think because video is shared maybe the better refresh is doing that on the A-Data. The other ram is fast but to latent.