Running Abit AT7-MAX2, AMD 2100+. 4 mem slots. Runs great with 4 256 chips. Runs great with 2 512 chips. I have 4 working 512 sticks. I've verified with other computers around the house. When I install all 4 in my AT7-MAX2, I start getting IE crashes which appear to be memory access failures. I can't tell if it's IE or a plug-in like Macromedia, but regardless it's annoying. Since Mozilla Firefox fails too, I'm thinking its Macromedia Flash Player. Any thoughts or similar experiences with IE or Flash player failing if memory is over 1gb?