Comparison of ASRock Radeon RX 5700 XT Challenger D 8G OC video card vs Sapphire Pulse Radeon RX 590 8G G5 video card by specs and benchmarks. ASRock Radeon RX 5700 XT Challenger D 8G OC runs at 1.650 GHz+ 3 % base clock speed and has 8 GB of GDDR6 memory, while video card Sapphire Pulse Radeon RX 590 8G G5 runs at 1.650 GHz+ 3 % base clock speed and has 8 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 225 W, and the second is 225 W . Compare the benchmark results to find out which video card is better.