Comparison of XFX Speedster MERC 319 Radeon RX 6950 XT Black Gaming video card vs SAPPHIRE Nitro+ Radeon RX 6950 XT Pure video card by specs and benchmarks. XFX Speedster MERC 319 Radeon RX 6950 XT Black Gaming runs at 2.009 GHz+ 4 % base clock speed and has 16 GB of GDDR6 memory, while video card SAPPHIRE Nitro+ Radeon RX 6950 XT Pure runs at 2.009 GHz+ 4 % base clock speed and has 16 GB of GDDR6 memory. The weight is different, -- vs --. The TDP of the first video card is 405 W+ 21 %, and the second is 405 W+ 21 % . Compare the benchmark results to find out which video card is better.