n30dg Posted November 18, 2017 Share Posted November 18, 2017 Hello, I was able to overclock the CPU to 1.488Ghz by editing rk3328-rock64.dtb file. But I can not figure out how to set the RAM-clock-speed. Is there any chance to ramp up the RAM clock? Link to comment Share on other sites More sharing options...
tkaiser Posted November 18, 2017 Share Posted November 18, 2017 11 minutes ago, n30dg said: I was able to overclock the CPU to 1.488Ghz by editing rk3328-rock64.dtb file Care to report the instabilities you will now run into (before others find this thread and think this would be a great idea)? You could start with https://github.com/ehoutsma/StabilityTester but would need to adjust both MAXFREQUENCY and the REGULATOR_* variables first. 1 Link to comment Share on other sites More sharing options...
n30dg Posted November 18, 2017 Author Share Posted November 18, 2017 41 minutes ago, tkaiser said: Care to report the instabilities you will now run into (before others find this thread and think this would be a great idea)? You could start with https://github.com/ehoutsma/StabilityTester but would need to adjust both MAXFREQUENCY and the REGULATOR_* variables first. I havn't discovered any instabilitie issues. The Board is running now (with these settings) for over 21days @ 100% load. I'm running a self-compiled NEON-optimized Version of Einstein@home's GW-App(LowFreq). Sure in order to get it stable at this high frequency, I had to ramp up the Voltage to 1.425V. Which is much above the recommended max. Voltage of 1.35V. And I wouldn't recommend this (quiet dangerous) setting to any other user. Thats why I don't included a detailed discription in my post. Link to comment Share on other sites More sharing options...
zador.blood.stained Posted November 18, 2017 Share Posted November 18, 2017 53 minutes ago, n30dg said: Is there any chance to ramp up the RAM clock? Not now. Currently RK3328 uses closed source blobs for DRAM initialization, open-source SPL implementation was posted recently and it could be available in the future - probably in 3-6 months in mainline u-boot, not sure if Rockchip will backport those changes to their BSP u-boot. Link to comment Share on other sites More sharing options...
n30dg Posted May 25, 2018 Author Share Posted May 25, 2018 Anythink new about this? Link to comment Share on other sites More sharing options...
Igor Posted May 25, 2018 Share Posted May 25, 2018 5 hours ago, n30dg said: Anythink new about this? https://github.com/ayufan-rock64/linux-build/blob/master/recipes/overclocking.md Link to comment Share on other sites More sharing options...
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