I've just added another stick of RAM to my PC, but upon turning my PC back on I found that my display is completely messed up - BIOS and start up menus are virtually unreadable because of thick vertical lines going across the screen. They also appear on Windows, but they're much finer and don't obscure the screen too much. I had the exact same problem this time last year when I bought new motherboard/memory/processor/graphics card and it seemed to fix itself. I've tried a different monitor and yet the problem remains. The memory I bought today was Kingston ValueRAM PC3200 512mb, the same brand and model as the first stick. Any ideas?