Comparison of SAPPHIRE NITRO+ Radeon RX 6600 XT video card vs ZOTAC GeForce GTX 1060 AMP! Edition+ 6GB video card by specifications and benchmarks. SAPPHIRE NITRO+ Radeon RX 6600 XT runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card ZOTAC GeForce GTX 1060 AMP! Edition+ 6GB runs at 1.556 GHz+ 3 % base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 160 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.