When you are doing CUDA computation, it is almost always very relaxing and convenient to have a display-only GPU so your “real” GPU can do work without worrying about laggy display or kernel timeout hassles. It is also required when running the Nexus debugger on a single machine. You want your display GPU to be an NVidia board so there’s no driver issues. But you also want it to be low power so it doesn’t add heat or power issues.
So an ideal companion is a simple GT210 board.
Well, you can pick one up for only $20 after a rebate.
From experience, it is always useful to have an extra display-only GPU sitting on your shelf, even if you don’t need it right now.
I realize this isn’t the “hot internet shopping dealz” forum, but some of them are too good not to share, and it’s a good opportunity to remind people how nice display-only GPUs are for development.