Hi flightsim, generally you have two options to force a 640x480 resolution with an nVidia graphics card. Either you will need "Soft15Khz" and hope that your Nvidia is accepted or you will need "Powerstrip" which is not Freeware, but for testing, you can download a Trial-Version. It MAY happen, that you will still need "Powerstrip", even if "Soft15Khz" is working, as there are sometimes problems with Interlaced Resolutions. You need to be aware, that you need a Interlaced 640x480 Resolution, which is different from the "normal" progressive 640x480 Resolution. This is where "Powerstrip" comes in, as you can setup such a Resolution for sure. I can confirm, that this works, as it is my setup in my MAME-Cab with a Nvidia Card. Soft15Khz: http://www.arcadeinfo.de/showthread.php?8170-International-Overview Powerstrip: http://entechtaiwan.com/util/ps.shtm