I recently added a new 512MB PC2700 stick of RAM to my ASUS A7N8X-Dx board. It now has 2 * 256MB PC2700 sticks in slots 1 and 2 and I added the 512MB stick to slot 3 following some obscure verbage on the ASUS website. At boot time the BIOS (v. 1.007) assures me that I have 1GB at 166mHz in Dual Channel mode. In City Of Heroes (nowhere else yet) I get blue screens of Death about Windows Failure. I ran memtest86 3.2 on that configuration and it found no errors. The 256MB sticks have chips on both sides of the PCB while the 512MB stick has chips only on 1 side of the PCB. I'd love to be able to run the whole GB of RAM together since it really clips along! Anybody run into something like this before?