I just tried to add 2 G.Skill pc2 8500 2gb 1066mhz dimms (5-5-5-15 2.0-2.1v). I have two Mushkin Blackline 1066mhz (6-6-6-18 2.0v) dimms that have worked for years. The mobo (a780gm-a ultra) won't do anything with all four installed. Any combination of two works but more than two dimms shuts me down. I know it isn't recommended that you mix ram brands but one of each works fine. I tried increasing the voltage to the dimms without success. I know these brands aren't on the compatible list on ecs website but they all work, just not together. I tried some crucial 1gb 800mhz strips and they also shut me down when there is more than two dimms installed. I also tried removing my graphics card and just using the integrated video. I have a 450w power supply and a Phenom ii x6 3.3ghz 1100t processor. Are there any bios settings I can try to get the four dimms functional? Any help would be appreciated.