Comparison of XFX Radeon RX 5600 XT Thicc III Ultra 14Gbps video card vs AMD Radeon RX 6600 XT video card by specs and benchmarks. XFX Radeon RX 5600 XT Thicc III Ultra 14Gbps runs at 1.130 GHz base clock speed and has 6 GB of GDDR6 memory, while video card AMD Radeon RX 6600 XT runs at 1.130 GHz base clock speed and has 8 GB of GDDR6 memory. The weight is different, -- vs . The TDP of the first video card is 160 W, and the second is 160 W . Compare the benchmark results to find out which video card is better.