Comparison of XFX Speedster MERC 319Radeon RX 6750 XT Black Gaming video card vs ZOTAC Gaming GeForce RTX 2080 SUPER Triple Fan video card by specs and benchmarks. XFX Speedster MERC 319Radeon RX 6750 XT Black Gaming runs at 2.324 GHz+ 6 % base clock speed and has 12 GB of GDDR6 memory, while video card ZOTAC Gaming GeForce RTX 2080 SUPER Triple Fan runs at 2.324 GHz+ 6 % base clock speed and has 8 GB of GDDR6 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.