Comparison of XFX Speedster MERC 319 Radeon RX 6700 XT Black Gaming video card vs ZOTAC GeForce GTX 1070 Twin Fan video card by specifications and benchmarks. XFX Speedster MERC 319 Radeon RX 6700 XT Black Gaming runs at 2.457 GHz+ 6 % base clock speed and has 12 GB of GDDR6 memory, while video card ZOTAC GeForce GTX 1070 Twin Fan runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 211 W-8 %, and the second is 220 W+ 47 %. Compare the table of benchmark results to find out which graphic card is better.