Comparison of XFX Speedster MERC 319 Radeon RX 6800 XT Core Gaming video card vs EVGA GeForce RTX 2080 SUPER XC Gaming video card by specifications and benchmarks. XFX Speedster MERC 319 Radeon RX 6800 XT Core Gaming runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card EVGA GeForce RTX 2080 SUPER XC Gaming runs at 1.650 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 300 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.