I purchased the CUH-7208B revision to replace my white CUH-1108A tulle. I took it primarily because of 4k and noise reduction. Impressions are very ambiguous. I did not feel a strong increase in productivity. Everything has really become smoother and the increase in resolution to 2K / 4K feels very nice. As for the noise level. The console is quite quiet in performance games, but the crackle / squeak of throttles is present and can periodically come to the fore in individual games. But he is insignificant. The console is quieter than my CUH-1108A and that's good. We can say for sure that it makes no sense to change the slim card for a firmware even with a 4k TV.