The absolute "best of class" Nvidia card is currently the 4090, which can be up to 30% faster than the 4080 in scaling workloads.
What would be more interesting is to see how Nvidia's laptop cards fare here though - they're constrained to much lower wattage (80-120w) and would make for a much fairer fight against the ~200w M2 Ultra.
What would be more interesting is to see how Nvidia's laptop cards fare here though - they're constrained to much lower wattage (80-120w) and would make for a much fairer fight against the ~200w M2 Ultra.