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    Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

    Pi 400 GPU overclocking - does this look right?

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    pi 400gpuoverclockingdreamcast
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    • SteffenBraunerS
      SteffenBrauner
      last edited by

      Hi

      I've bought the Raspberry Pi 400, and I'm hoping to play Dreamcast games on it.

      From what I have read when searching, the Pi 400 can take some overclocking without problems, and I suspect that it would be beneficial to overclock it to make Dreamcast games run a little better/smoother.

      If I understand it correctly, it is the GPU overclock that it mostly important here. And I have trouble finding details about that - I mostly find guides on overclocking the CPU.

      What overclock settings would you recommend for my Pi 400? Does something like this look right?:

      over_voltage=6
      arm_freq=2000
      gpu_freq=650

      If it matters, my power supply is the Argon ONE Raspberry Pi 4 power supply, 18 Watt, 5.25 Volt, 3.5 Amp.

      I'm looking for a stable, safe overclock, more than the absolute max. I've never overclocked before, so I'm a bit out of my element here, and not sure I'm understanding it all correctly - and a bit afraid to do something wrong.

      Any help is appreciated :-)

      W 1 Reply Last reply Reply Quote 0
      • M
        mth75
        last edited by

        You really can't go wrong.

        I tested 3 Pi400's overclocked with:

        over_voltage=8
        arm_freq=2147
        gpu_freq=750

        all to them are stable.

        Take it to the (almost) max.

        SteffenBraunerS 1 Reply Last reply Reply Quote 1
        • SteffenBraunerS
          SteffenBrauner @mth75
          last edited by

          @mth75 Thanks, that looks pretty high. But great if that isn't a problem. So I won't be pushing the Pi 400 too much with your settings? I'm new to this, as I said, so I want it to be "safe" and be able to run from now on and years to come, hopefully :-)

          M 1 Reply Last reply Reply Quote 0
          • M
            mth75 @SteffenBrauner
            last edited by

            @steffenbrauner

            Almost . But the Pi400 remains stable and stays cool enough.

            1 Reply Last reply Reply Quote 1
            • W
              webbsmurfen @SteffenBrauner
              last edited by

              @steffenbrauner
              Hmm.. Im not entire sure here but Isnt GPU speed 700 @ standard?.. you're underclocking GPU with gpu_freq=650?!
              GPU: Broadcom VideoCore VI @ 700 MHz

              mituM 1 Reply Last reply Reply Quote 0
              • mituM
                mitu Global Moderator @webbsmurfen
                last edited by

                @webbsmurfen On the PI4, the GPU core freq is 500, not 700. You're confusing it with other value. See https://www.raspberrypi.com/documentation/computers/config_txt.html#overclocking

                1 Reply Last reply Reply Quote 0
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