So much confusion over this. CryoUtilities has never actually increased performance. Period. None of the tweaks can possibly do that. It’s not overclocking the CPU or GPU, so performance is a constant.

What it did do, and why it was actually useful, is improve memory management. The Steam Deck only has 16GB of RAM, of which 8GB can be allocated to the GPU as VRAM. The stock Deck is also only configured with 1GB of swap. That creates many situations, particular in more modern AAA titles, where the Deck becomes entirely memory constrained, rather than CPU or GPU limited. These tweaks simply helped the memory shuffle taking place be a little more efficient/quick, and of course, increasing the swap gives a little more breathing room. Even this isn’t ground shaking stuff, but it was enough in many cases to take a game with bad stuttering or crashes due to memory constraint issues, and make it playable.

It has less effect on the OLED, because the OLED has faster, denser memory (two chips instead of four). This structural improvement helps with the memory dance even better than the tweaks CryoUtilities does. It doesn’t mean that the tweaks suddenly stop working or don’t work the same. It’s still doing what it always was. These are just system settings. They’re just less noticeable, because they’re less needed overall.