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I have an overclocked pi4 running retro pie. I would like to boost the GPU performance.. Here are my overclock settings:

#uncomment to overclock the arm. 700 MHz is the default.
over_voltage=6
arm_freq=2147
gpu_freq=850
gpu_mem=320
#Ram Overclock
sdram_freq=588
sdram_schmoo=0x02000020
over_voltage_sdram_p=6
over_voltage_sdram_i=4
over_voltage_sdram_c=4

I tried to raise the frequency of the GPU more than 850, but the graphics went wacko after I tried one of my games. Can anyone help me? I need some better settings. I'm very new to overclocking.

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    I tried to raise the frequency of the GPU more than 850, but the graphics went wacko after I tried one of my games - then don't raise gpu_freq above 850 - hope that helps
    – Jaromanda X
    Jun 21, 2020 at 3:27
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    The Pi4 really does not like being overclocked. Just because you might find tipps on how to do it, that doesn't mean it can be done without side effects.
    – PMF
    Jun 21, 2020 at 7:24

2 Answers 2

Reset to default
1

I found out that adding more GPU Memory helps! I can't overclock it more that I already have, but setting GPU memory to 460 seems to improve performance.

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Please remove

#Ram Overclock 
sdram_freq=588 
sdram_schmoo=0x02000020 
over_voltage_sdram_p=6 
over_voltage_sdram_i=4 
over_voltage_sdram_c=4

This actually SLOWS down the Pi4 A LOT. This was only good on the Pi 3 and below. Pi4 has DDR4 RAM that runs WAY faster. Remove all those lines from config and reboot. Also, drop the overclock to CPU to 2100, and the GPU would be best at 750. 800MHz doesnt help much extra, and as you saw 850 or higher goes berzerk.

As someone else mentioned, give the GPU more RAM. 512MB is the most you can give it. Once you go 600MB or more on GPU RAM MB, you will have issues.

Trust me :)

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