NVIDIA A40 PCIe 's Advantages
More VRAM (48GB vs 8GB)
Larger VRAM bandwidth (695.8GB/s vs 224.0GB/s)
8960 additional rendering cores
AMD Radeon RX 6600 's Advantages
Released 1 years late
Boost Clock has increased by 43% (2491MHz vs 1740MHz)
Lower TDP (132W vs 300W)