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...
0 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...
0 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...
0 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...
0 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...
0 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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n30dg
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?
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