Overclock Raspberry Pi 3 Running LAKKA

Libretro Lakka
#1

I found these RetroPie config settings. https://www.dropbox.com/s/c1sjaa4u9iyqdpo/Raspberry%20pi%203%20RETROPIE%20Overclock.txt?dl=0 https://www.dropbox.com/s/su7mva9qpcq4xzr/PI3%20OVERCLOCK.txt?dl=0

Can I use them in the config.txt after installing LAKKA?

1.4 ghz overclock

gpu_mem=400
arm_freq=1400
gpu_freq=520
core_freq=520
sdram_freq=520
sdram_schmoo=0x02000020
over_voltage=2
sdram_over_voltage=2

#2

Lakka doesn’t really do anything unusual to the config.txt, so anything that typically works on RPis should work on a Lakka RPi setup, as well.

#3

Here are the default configs:

LAKKA
https://pastebin.com/raw/xSi5q3th

RetroPie
https://pastebin.com/raw/JtxinkHn

Many settings in the LAKKA image config.txt are missing, such as:

hdmi_drive
config_hdmi_boost
arm_freq

So the config.txt is part of the Pi BIOS and not the OS, so any settings can be used?

#4

yeah, add whatever you want. It shouldn’t matter.

I’ve personally messed with various hdmi_group and hdmi_cvt settings to get it working on my CRTs at 240p over HDMI.

#5

When you get a chance, could you post a pastebin link to your CRT config.txt. I’d like to do that eventually.

#6

Sure. I think all I actually needed to do was add these lines:

hdmi_group=2

hdmi_mode=87

hdmi_cvt=1920 240 60

I tried using a 3840 width but it wouldn’t work. You could also use whatever other width you want, like 512 or 1280 or whatever.

1 Like
#7

I think you can safely use these overclock settings in Lakka.

#8

I overclocked to 1.35GHz. I played a game for 30 minutes, everything went fine.

But when I scrolled through a game playlist for more than 15 seconds, the XMB menu would glitch out and boxarts turned black.

Settings:

total_mem=1024
gpu_mem=400
arm_freq=1350
gpu_freq=500
core_freq=500
sdram_freq=500
sdram_schmoo=0x02000020
avoid_pwm_pll=1
v3d_freq=500
over_voltage=5
over_voltage_sdram=2
temp_limit=80

#9

do you have heatsinks/active cooling, specifically on the GPU?

#10

I have a heatsink and dual fans, for cpu and gpu.

#11

“[…] XMB menu would glitch out and boxarts turned black.”

this is somewhat a normal issue with arts in retroarch for some time. happens on any platform I tested (Windows, RPi2), I can’t really reproduce its instability, but it has been less and less frequent. I don’t think this is overclock related

1 Like
#12

I reduced the overclock to 1.3GHz and the problem went away.

total_mem=1024
arm_freq=1300
gpu_mem=400
gpu_freq=500
core_freq=500
sdram_freq=500
sdram_schmoo=0x02000020
avoid_pwm_pll=1
v3d_freq=500
over_voltage=2
over_voltage_sdram=2
temp_limit=80

#13

I think that the problem is still there, not really related to overclocking. It just happens randomly.

#14

I run a steady overclock of 1200mhz on all my systems. Works well.

#15

Hi I would also like to run overclock, I just mounted 2 heat sinks, how much I can push it? Where do I have to put the overclock parameters in the config because the files are different from the retropie? Thank you

#16

New to overclocking. I’m running lakka 2.1 on RPi3. Are there any step by step tutorials on basic overclocking set up to get me started? The 2.1 config.txt file seems different from what instructions I’ve found online?