Comparison of Sapphire Pulse Radeon RX 580 8G G5 video card vs ZOTAC GAMING GeForce RTX 2080 video card by specifications and benchmarks. Sapphire Pulse Radeon RX 580 8G G5 runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ZOTAC GAMING GeForce RTX 2080 runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 250 W+ 16 %. Compare the table of benchmark results to find out which graphic card is better.