Comparison of XFX Radeon RX 580 Double Dissipation 8GB video card vs ASUS ROG Strix LC Radeon RX 6800 XT OC video card by specifications and benchmarks. XFX Radeon RX 580 Double Dissipation 8GB runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ASUS ROG Strix LC Radeon RX 6800 XT OC runs at 1.925 GHz+ 5 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.