Comparison of GIGABYTE Radeon RX 580 Gaming 4G MI video card vs PowerColor Red Devil Radeon RX 580 8GB video card by specs and benchmarks. GIGABYTE Radeon RX 580 Gaming 4G MI runs at 1.257 GHz base clock speed and has 4 GB of GDDR5 memory, while video card PowerColor Red Devil Radeon RX 580 8GB runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 185 W, and the second is 185 W . Compare the benchmark results to find out which video card is better.