Well I actually ended up buying a used GTX 650 Ti on eBay which I've been fortunate to work so far. My biggest issue so far has been getting sound to work since enabling the NVIDIA driver via the recalbox-boot.conf file. I had onboard NVIDIA graphics on my mobo. Nforce something or other. And since enabling the NVIDIA driver I can't get my audio out of either the back IO or front headphone jack, and the only port on the GPU that has any audio capabilities is a Mini HDMI port which I'm not using. Chances are this is an issue with my hardware since I'm using a cheap, crappy prebuilt HP PC with a whole host of incompatibility issues. If you have a more compatible MOBO with a much more robust BIOS than mine you shouldn't have my issues I'm sure. I'm going to try and buy a cheap USB Audio adapter on Amazon and see if I can get sound from that instead. I got the GPU on an auction $41.00 US used.so far I can run GameCube games at 3x internal res (1080p) pretty stable but it depends on the title. For instance Mario Kart Double Dash runs better than Pokemon XD Gale of Darkness for me