Comparison of PowerColor Red Dragon Radeon RX 580 8GB V3 video card vs PowerColor Red Dragon Radeon RX 580 4GB video card by specs and benchmarks. PowerColor Red Dragon Radeon RX 580 8GB V3 runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card PowerColor Red Dragon Radeon RX 580 4GB runs at 1.257 GHz base clock speed and has 4 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.