I am trying to add another 4 gb of ram to make total of 8gb. I am running a q9300 with a Asus Maximus II mb. I just installed a new copy of Win 7 pro last week. I tried to add another 4gb of ram last night and the BIOS sees the ram, but when its starts to load windows it blue screens and reboots. The RAM kit is a different manufacter but same size and speeds. Anyone have any ideas what could be causing this?