I have communicated wih A-data recently, and they may soon end up having 2 versions of this. I believe the recent PC4000 Winbond BH-4 ES (engineering sample) they showed is not yet available to purchase. I also believe that those chips if and when they come out, may be quite a bit better than the ones pictured above, at least as far as timings are concerned. Probably not that big of a concern if they are going on a P4 board. Just keep this in mind.