I have a Micron Millenia XP+ Series Desktop running Windows XP Professional. This contains a MSI K7N420 Pro Motherboard. It also 2 128 MB DDR SDRAM DIMMs and 1 256 MB DDR SDRAM DIMM. Recently it began crashing when doing anything highly graphic intensive (3d Editing, Gaming, etc.) After some troubleshooting I was able to stop this by removing memory from the first memory bank. It seemed to work fine with various combinations of memory in the other 2 slots. As soon as I put memory back in bank 1, it crashed. I thought this meant that the first slot on the motherboard was faulty so I called Micron and recieved a new motherboard. To my dismay, this did not solve the problem. It has continued to crash, even 1 time with slot 1 open, which it never did with the original motherboard. Today, I discovered that if I put the DIMMS in the order of 128, 128, 256 from slot 1 to slot 3, the computer freezes when starting windows XP. When I removed any of the DIMMs, it would load fine. Any ideas on what could be causing this?