I just installed a slave hard drive to my computer. It worked okay. Then I installed some new PC2700 DDR 1.5GB memory into the board P4VXAD+. I'm pretty sure this memory is okay with this board since PC2700 is backward compatible with PC2100. When I powered on, the initial memory test read 1.3 GB and I got a CMOS checksum error. I looked around the internet, so I replaced the battery for the CMOS. I don't think this was the problem as the old battery still seems to have charge. I still get the CMOS checksum error. When I try to access the BIOS, I get a blue screen with all of the options, but when I try to select something the computer freezes. When I boot into the hard drive, my Linux OS freezes. Am I going to need a new motherboard? If so, will my memory still work? Why isn't the memory reading the full 1.5GB? Should I use this memory with the new motherboard if I get a new motherboard?