Bonjour! I've tested my RAM memmories (2 ddr Samsung by 512mb each) with MemTest and I get 0 errors while testing each by each, but if I put them both I get the blue screen and system restarts when I try to test them with MemTest. What is the reason? Thanks PS. I have only 2 ddr slots and I realy don't know what to do now, to sell this memories? and maybe buy new ones, but how can I be sure that the new ones will work?