The inclusion of infinity cache makes TFLOPs comparisons between RDNA 1 & 2 all the more difficult and skews the results. Someone should do this with two GPUs of the same architecture.The 6600XT has infinity cache to make up the difference:
But we see the same performance at 1080p, where the bandwidth difference between the two (especially with infinity cache) should have minimal impact:
7% performance difference in favour of the 6600XT. Overall TFLOP difference? 7% in favour of the 6600XT. Clock speed advantage, over 600Mhz in favour of the 6600XT. Rasterisation and pixel fill-rate? Massive advantage for the 6600XT again.
RX 6700 XT (40 CU) at 2100 MHz and RX 6800 (60 CU) at 1400 MHz will have identical TFLOP numbers.