T-rex miner is only for Nvidia graphics cards. This miner will not work with AMD cards.
Pros:
Cons:
Supported on versions <= 0.19.4
The developer fee is 1% (2% for Octopus, Autolykos2, and their dual mining modes), so the miner mines for you 99 out of 100 minutes, and for the devs, that remaining minute.
Supports modern NVIDIA GPUs Maxwell and newer: 40x0 30x0, 20x0, 16x0, 10x0 and 9x0 series as well as older cards with enough VRAM