Comparison of ASRock Radeon RX 6600 XT Phantom Gaming D 8GB OC video card vs GIGABYTE Radeon RX Vega 64 Gaming OC 8G video card by specifications and benchmarks. ASRock Radeon RX 6600 XT Phantom Gaming D 8GB OC runs at 2.064 GHz+ 5 % base clock speed and has 8 GB of GDDR6 memory, while video card GIGABYTE Radeon RX Vega 64 Gaming OC 8G runs at 1.276 GHz+ 2 % base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 160 W, and the second is 295 W. Compare the table of benchmark results to find out which graphic card is better.