I use the EVGA GTX 570 HD 1GB which is an old graphics card but alot of fun can still be had with it.
I have 3 GT730's one for my mum one for my dad and one for my brother i personally have a Radeon RX480 4GB
in my main rig i have a GTX 980Ti AMP Edition 6GB the rest of my GPUs r pretty old: ATI/AMD 4xHD 6870 1xHD 6970 DirectCUII (3Slot) 1xHD5670 2xHD 5450 NVidia: 1xGeForce 6200LE 1x8800GTS Alpha Dog(i gave it to my brother coz he had a HD5450 be4) (all of them r still running as BTC Mines or are being used in lan party/office PCs)