Comparison of GALAX GeForce GTX 1080 Ti EX OC video card vs AMD Radeon RX 6400 - Reference Data video card by specifications and benchmarks. GALAX GeForce GTX 1080 Ti EX OC runs at 1.531 GHz+ 3 % base clock speed and has 11 GB of GDDR5X memory, while video card AMD Radeon RX 6400 - Reference Data runs at base clock speed and has 4 GB of GDDR6 memory. The TDP of the first video card is 250 W, and the second is 53 W. Compare the table of benchmark results to find out which graphic card is better.