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Out of curiosity, I overclocked my pi to turbo. However, now when I start the pi, it freezes at the splash screen and refuses to boot. I am using the RetroPie OS. Is there anything that I can do in order to change the overclock setting so that I can boot the pi again? Would it be possible to read the SD card into my main computer and change the overclock settings?

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up vote 10 down vote accepted

Yes it would.

https://www.raspberrypi.org/documentation/configuration/config-txt.md

The various system configuration parameters, which would traditionally be edited and stored using a BIOS, are stored in an optional text file named config.txt. This is read by the GPU before the ARM CPU (and Linux) is initialised; therefore it must be located on the first (boot) partition of your SD card, alongside bootcode.bin and start.elf. This file is normally accessible as /boot/config.txt from Linux and must be edited as root; but from Windows or OS X it is seen as a file in the only accessible part of the card.

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Note that neither this answer or the quoted text address that fact that due to the way Windows and Linux uses different characters to indicate a new line, that simply using Notepad on Windows and then saving the file will render the file unreadable by the kernel. You should use something like Notepad++ that preserves the correct file ending characters. – user9993 Jan 29 at 18:03

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