Comparison of AMD Radeon RX 7900 XTX video card vs ASRock Radeon RX 7900 XTX Phantom Gaming 24GB OC video card by specifications and benchmarks. AMD Radeon RX 7900 XTX runs at 1.900 GHz base clock speed and has 24 GB of GDDR6 memory, while video card ASRock Radeon RX 7900 XTX Phantom Gaming 24GB OC runs at 1.900 GHz base clock speed and has 24 GB of GDDR6 memory. The TDP of the first video card is 355 W, and the second is 355 W. Compare the table of benchmark results to find out which graphic card is better.