Comparison of XFX Radeon RX 590 Fatboy 8GB video card vs AMD Radeon RX 6700M (Mobile) - 135 W video card by specifications and benchmarks. XFX Radeon RX 590 Fatboy 8GB runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 memory, while video card AMD Radeon RX 6700M (Mobile) - 135 W runs at 1.489 GHz-35 % base clock speed and has 10 GB of GDDR6 memory. The TDP of the first video card is 225 W, and the second is 135 W. Compare the table of benchmark results to find out which graphic card is better.