Hi everyone: I have an HP Pavilion 7955 (1.5GHz Pentium 4, 256MB RAM, 40GB HDD), which according to HP has the following motherboard: ASUS P4B-LA (Amazon) Pictures seem to visually confirm what I have inside my case. I want to replace the default 32MB TNT2 AGP card with the following: Gforce4 MX440 128MB 8x/4x AGP card At least, that's how it was advertised (8x/4x). The trouble, however, is this... Everything works fine when the TNT2 is in the AGP slot. When I replace it with the Geforce4, the computer gives me beeping noises on startup and gives me a blank screen. It won't even display the BIOS POST, and the monitor's LED flashes as if it isn't even receiving a signal. When I put the TNT2 back in, all is well. I know it's not the Geforce4, as it works fine on another machine. The motherboard doesn't have on-board video, so there's no way for me to troubleshoot this. Does anyone know what's going on? Help!