라즈베리 1b 기준으로 테스트 한 문서
(USB 포트가 2개라서 보드레이아웃이 B 인듯? 그리고 2015년에 2가 나왔으니..)
[링크 : http://www.mobileappsystems.com/blog/raspberry-pi-overclocking-overvolting]
turbo 모드로 할 경우 warranty에 영향이 없음이라는데...
We’ve been doing a lot of work to understand the impact of voltage and temperature on lifetime, and are now able to offer a “turbo mode”, which dynamically enables overclock and overvolt under the control of a cpufreq driver, without affecting your warranty. We are happy that the combination of only applying turbo when busy, and limiting turbo when the BCM2835’s internal temperature reaches 85°C, means there will be no measurable reduction in the lifetime of your Raspberry Pi.
[링크 : https://www.raspberrypi.org/introducing-turbo-mode-up-to-50-more-performance-for-free/]
Overclocking
NOTE: Setting parameters other than that available by 'raspi-config' will set a permanent bit within the SoC, making it possibly to detect that you Raspberry Pi has been overclocked. This was meant to void warranty if the device has been overclocked. Since 19th of September 2012 you can overclock your Raspberry Pi without affecting your warranty[2]
The latest kernel has a cpufreq kernel driver with the "ondemand" governor enabled by default. It has no effect if you have no overclock settings. But when you do, the arm frequency will vary with processor load. Non default values are only used when needed according to the used governor. You can adjust the minimum values with the *_min config options or disable dynamic clocking with force_turbo=1. [3]
Overclock and overvoltage will be disabled at runtime when the SoC reaches 85 °C to cool it down. You should not hit the limit, even with maximum settings at 25 °C ambient temperature. [4]
[링크 : http://elinux.org/RPiconfig]
