Comparison of ASRock AMD Phantom Gaming X Radeon RX 580 8G OC video card vs AMD Radeon RX 580 (36 CU) video card by specs and benchmarks. ASRock AMD Phantom Gaming X Radeon RX 580 8G OC runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card AMD Radeon RX 580 (36 CU) 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.