Comparison of Sapphire Nitro+ Radeon RX 5700 XT 8G video card vs GIGABYTE Radeon RX 6900 XT Gaming OC 16G video card by specifications and benchmarks. Sapphire Nitro+ Radeon RX 5700 XT 8G runs at 1.770 GHz+ 10 % base clock speed and has 8 GB of GDDR6 memory, while video card GIGABYTE Radeon RX 6900 XT Gaming OC 16G runs at 1.875 GHz+ 3 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 265 W+ 18 %, and the second is 340 W+ 13 %. Compare the table of benchmark results to find out which graphic card is better.