Comparison of XFX Speedster SWFT 319 Radeon RX 6800 XT CORE video card vs ASRock Radeon RX 6900 XT Phantom Gaming D 16G OC video card by specs and benchmarks. XFX Speedster SWFT 319 Radeon RX 6800 XT CORE runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card ASRock Radeon RX 6900 XT Phantom Gaming D 16G OC runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory. The weight is different, -- vs 1784 g. 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.