AMD Radeon RX 6900 XTX 's Advantages
More VRAM (16GB vs 8GB)
Larger VRAM bandwidth (576.0GB/s vs 256.0GB/s)
3072 additional rendering cores
AMD Radeon RX 6600 XT 's Advantages
Boost Clock has increased by 6% (2589MHz vs 2435MHz)
Lower TDP (160W vs 330W)