Comparison of ASUS ROG Strix LC Radeon RX 6900 XT TOP video card vs PowerColor Radeon RX Vega 56 video card by specifications and benchmarks. ASUS ROG Strix LC Radeon RX 6900 XT TOP runs at 1.950 GHz+ 7 % base clock speed and has 16 GB of GDDR6 memory, while video card PowerColor Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 300 W, and the second is 210 W. Compare the table of benchmark results to find out which graphic card is better.