Comparison of Biostar Radeon RX Vega 56 8G video card vs EVGA GeForce GTX 1080 GAMING ACX+LED video card by specifications and benchmarks. Biostar Radeon RX Vega 56 8G runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card EVGA GeForce GTX 1080 GAMING ACX+LED runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory. The TDP of the first video card is 210 W, and the second is 180 W. Compare the table of benchmark results to find out which graphic card is better.