Comparison of GIGABYTE Radeon RX 7900 XT GAMING OC 20G video card vs GIGABYTE AORUS Radeon RX 6900 XT Master 16G (rev. 2.0) video card by specs and benchmarks. GIGABYTE Radeon RX 7900 XT GAMING OC 20G runs at 1.500 GHz base clock speed and has 20 GB of GDDR6 memory, while video card GIGABYTE AORUS Radeon RX 6900 XT Master 16G (rev. 2.0) runs at 1.500 GHz base clock speed and has 16 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.