Comparison of AMD Radeon RX 7900 XT video card vs GIGABYTE Radeon RX 7900 XT GAMING OC 20G video card by specs and benchmarks. AMD Radeon RX 7900 XT runs at 1.500 GHz base clock speed and has 20 GB of GDDR6 memory, while video card GIGABYTE Radeon RX 7900 XT GAMING OC 20G runs at 1.500 GHz base clock speed and has 20 GB of GDDR6 memory. The weight is different, -- vs --. The TDP of the first video card is 300 W, and the second is 300 W . Compare the benchmark results to find out which video card is better.