Comparison of Colorful iGame GeForce GTX 1070 SI-8G-V video card vs ASRock Radeon RX 570 Phantom Gaming U 8G OC video card by specs and benchmarks. Colorful iGame GeForce GTX 1070 SI-8G-V runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ASRock Radeon RX 570 Phantom Gaming U 8G OC runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 150 W, and the second is 150 W . Compare the benchmark results to find out which video card is better.