I recently built a new system from scratch. Pertinent details below: Vista Premium 32-bit SP1 Gigabyte P45 motherboard 4GB RAM @ 1333Mhz (2x2GB sticks, dual channel) nVidia GTX280 1 GB 1000W Corsair PS When booting up, I do not get a display signal from the graphics card., Green LED is observed on the fan, all other fans and power start to run. I tested further and when using an older nvidia card (7900GTX 512MB), it works perfectly. I believe the issue is related to having more then 4GB total RAM. Does anyone know if its possible that having 5 Gig's of RAM on a 32-bit OS would cause display problems such as this, or does the OS just ignore any memory it cannot address? Additional notes: I have two seperate 6+2 PCI-E conenctors supplying the power to the card and the PS is more then capable of supporting the card. BOth DVI ports are experiencing the no display issue please let me know if anyone needs any other details. thanks in advance for your help.