Hi, I've just added more RAM to a Gigabyte GA-5AX mainboard. I've put 256MB of SDRAM (PC100) in it. When I start it up, the memory check shows that I have 525MB of RAM and then it stops there on that screen and the whole thing freezes. Now I know that I've had the same type in before, but now I'm baffled. Could it be a jumper problem? TiA, Sidewinder.