I'm working on an Intel D865GLC with 2.4 GHz P4 (800 MHz bus). It has Win2k SP4 installed and a pathetic 512 MB of memory (2x 256). The board has 4 DDR-DIMM sockets and supports up to 4GB of PC3200 memory. It has the latest BIOS revision. I bought 4 new PC3200 modules, installed them, and fired it up. It flew through POST (I enabled extended memory tests for the first boot). Then the system hung up as Windows tried to start. The display was missing colors, flashing bars and blocks as it sat in the Win2k loading page. It seemed like a memory issue, so I rotated through each of the 1 GB modules. Each time I got slightly different results, but always ended with it locking up. The farthest I got was the user login screen, but with funky colors and it hung as I tried to log in. I've installed memory in plenty of machines, but never with results like this. The Windows installation isn't happy with even 1GB of memory, and it should support 4GB. Is there any other troubleshooting that I can do? I'm thinking about trying Ubuntu to verify the system can be stable with the 4GB. The customer doesn't have a budget right now to purchase XP for this system.