Your type of video card is supposed to have forward and backward compatibility (UDA) on its device drivers. You are supposed to be able to use the same device driver on newer and older versions of Windows. Windows XP comes with a list of compatible hardware and software but you have checked your equipment against it. Also, ASUS and NVIDIA have webpages with technical support. You can do a cross check at each site to see if there have been any problems with the other's product. The device drivers are one thing you suspect. Another is that the new motherboard is having problems with the Poser hard disk. This disk was formatted by another motherboard under another operating system. Each hard disk gets a low level format and a high level format. The higher level format is the one the user is familiar with. It is what you change when you reformat. When I went to my new system, I brought over my SCSI card, tape drive, and hard disk. It was formatted under Windows 2000 and has FAT32 which I haven't changed. The C: drive is the bootable and the operating system was installed at the factory. I haven't had any real problems with the SCSI system however the tape drive used a 10GB Travan which means multiple cartridges per backup. With the newer machines, you can get a USB external tape unit. They are expensive but you have far more tied up in your software. CD's and DVD's are a real pain compared to tape.