Comparison of XFX Radeon RX 570 RS 4GB Black Edition Only at Best Buy video card vs ASUS Expedition Radeon RX 570 OC 8GB GDDR5 video card by specs and benchmarks. XFX Radeon RX 570 RS 4GB Black Edition Only at Best Buy runs at 1.168 GHz base clock speed and has 4 GB of GDDR5 memory, while video card ASUS Expedition Radeon RX 570 OC 8GB GDDR5 runs at 1.168 GHz base clock speed and has 8 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 200 W+ 33 %, and the second is 200 W+ 33 % . Compare the benchmark results to find out which video card is better.