I have a GA-7DPXDW motherboard. One 512mb registered ecc ddr stick, of either samsung or micron. I just bought a 1gb samsung stick and stuck it in. For some reason, adding that stick, the computer is very slow to boot up. Turn it on, and it sits for about a minute before it even hits post. Not even a video signal is picked up during that minute. After that, all is fine, memory recognized and all. I tried arranging the sticks differently, using just one or the other. It only happens with that 1gb stick. I had it tested, and it works. Any thoughts? I'll just looking for bios updates later on tonight.