Comparison of XFX Speedster MERC 319 Radeon RX 6800 XT Core Gaming video card vs ASUS ROG Poseidon GeForce GTX 1080 Ti Platinum edition 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 ASUS ROG Poseidon GeForce GTX 1080 Ti Platinum edition runs at 1.594 GHz+ 8 % base clock speed and has 11 GB of GDDR5X 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.