The KVR13N9S8/4 appears to be a newer line from Kingston and is prob made with high density memory chips which aren't compatible with socket 775 mobos, can confirm via Kingston's rep here on the forums, send a PM to KingstonHQ he can let you know for sure
Thank you and sasa318 for the density info. I will MP later. The problem is to find the older line when you need it for a 775 mobo, at least where I live I had no luck then I switched to Samsung. These boards even run Windows 10, they are not trash yet. I still can game in a Core 2 Quad.