Gtx 660 2gb vs amd rx 550 2gb

In benchmarks, the 660 is the faster card, by some margin.

http://gpu.userbenchmark.com/Compare/Nvidia-GTX-660-vs-AMD-RX-550/2162vs3925

However, the RX 550 will have more VRAM, and be less hungry on wattage, by a fair bit, so be sure to look closely at specific model specs, and consider your system's airflow and PSU, if an issue. The RX 550 is also a lot newer.

The RX 560 has the best of both worlds, with speeds comparable to the 660 and more VRAM.
 
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