Since SteamOS 3.5 finally released into stable, I’ve been looking forward to try out PS3 emulation on the Steam Deck, especially the Uncharted series & MGS4.

Long story short, performance was rather subpar, with frequent FPS drops.

Looking around, I came across this post on Reddit:

https://www.reddit.com/r/SteamDeck/comments/16ydaoz/mgs4_on_rpcs3_with_full_visual_effects_on_the/

After applying the tweaks referenced there, I really did saw a boost of a few more additional frames, but the real improvement is that the frametimes become more even, resulting in noticeably less stuttering.

With a 50 % resolution render scale, Uncharted 1 can be considered playable on the Steam Deck, IMHO.

Hope these tweaks help you guys out, too!

    • MrFontana@alien.topBEnglish
      1·
      10 months ago

      Yeah I’ve tinkered a few times and noticed that sometimes the non SPU caches compile weird and deleting them and recompiling usually works. You can also go to the audio settings and down it from 32bit to 16bit if I recall and that helps sometimes. I’ll post all the resources I used to optimize my settings on this comment

      • iamfromouttahere@alien.topBEnglish
        1·
        10 months ago

        Somebody reommended to enable Max SPURS threads to 3 in advanced… It works! :D

        I’m in chapter 2 now, and its a noticeable difference :O

        • MrFontana@alien.topBEnglish
          1·
          10 months ago

          Oooooh I’ll try that now as well. It’s already running so smoothly but I still get random hangups during cutscenes so I wonder if this’ll fix that.

          I tried dropping the resolution scale to 50% and doing 100% FSR but it was too noticeably bad quality so I upped the resolution scale to 75% and it’s pristine