Comparison of ASRock Radeon RX 6600 XT Challenger Pro 8GB OC video card vs PNY RTX A4000 video card by specifications and benchmarks. ASRock Radeon RX 6600 XT Challenger Pro 8GB OC runs at 2.033 GHz+ 3 % base clock speed and has 8 GB of GDDR6 memory, while video card PNY RTX A4000 runs at 0.735 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 160 W, and the second is 140 W. Compare the table of benchmark results to find out which graphic card is better.