Comparison of Sapphire Pulse Radeon RX 580 8G G5 V2 video card vs Sapphire Pulse Radeon RX 580 4G G5 V2 video card by specs and benchmarks. Sapphire Pulse Radeon RX 580 8G G5 V2 runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Sapphire Pulse Radeon RX 580 4G G5 V2 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 225 W+ 22 %, and the second is 225 W+ 22 % . Compare the benchmark results to find out which video card is better.