Comparison of XFX Speedster MERC 319 Radeon RX 6800 Black Gaming video card vs EVGA GeForce GTX 980 Ti SC GAMING ACX 2.0+ video card by specs and benchmarks. XFX Speedster MERC 319 Radeon RX 6800 Black Gaming runs at 1.850 GHz+ 9 % base clock speed and has 16 GB of GDDR6 memory, while video card EVGA GeForce GTX 980 Ti SC GAMING ACX 2.0+ runs at 1.850 GHz+ 9 % base clock speed and has 6 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 250 W, and the second is 250 W . Compare the benchmark results to find out which video card is better.