![]() I got the same results with 84/100mhz using Sandisk extreme uhs-3. Lastly…if DietPi uses Ramlog anyway so there is no writes to the card when using dietpi…will overclocking the SD parms in config.txt greatly improve performance due to increased Read speeds?įrom what I remember during testing. This seems to say that I need to use only values of 50, 80 or 100…and not 84? When can I use Fourdee’s suggestion of 84 and when should I not?Īnd when do I need to install the sdtweak-overlay.dtb? I don’t use wifi on my Pi 3 so do I only add this if I want to use wifi? “You can try other, lower overclock settings, as long as the number is an integer divisor of the core clock (default is 400 MHz on the Pi 3), e.g. Which do I use? In k-plans post it mentions that K-plan - dtoverlay=sdtweak,overclock_50=100 In that file (anywhere? Does it matter where I put this) I add the line: Fourdee - dtoverlay=sdhost,overclock_50=84 To overclock the SD card I need to edit this file on my DietPi - /DietPi/config.txt Sorry for bringing back to life an old thread from the summer…but I’d like to confirm a few things since the original post by Fourdee and the followup post from K-Plan have slightly different details. Sdhost.dtbo sdio-1bit.dtbo sdio.dtbo sdtweak.dtbo You should try out the new " sdtweak-overlay.dtb " like: dtoverlay=sdtweak,overclock_50=100 Overlay or the new sd_* dtparams of the base DTBs If this isn’t what you want, either use the sdtweak The default, so it disables the other (mmc) interface - this will kill This overlay is designed for situations where the mmc driver is Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock. You can try other, lower overclock settings, as long as the number is an integer divisor of the core clock (default is 400 MHz on the Pi 3), e.g. On a Raspberry Pi 3, you can try: dtoverlay=sdhost,overclock_50=100 Over the last couple of days on a Pi 3 and discovered that each time I enabled this in my configuration file, it caused the onboard wifi to disappear. Maybe the overclockig frequenzy could be lowered so wifi plays nice.Ĭhanging the sdhost value to either 50, 63 or 84 does not work, even if core_freq is set to 250. I can confirm that wifi stops working for me… unfortunately. Bit of a trade off and Its untested, but I will give this a go over the weekend and report results. I’am not sure if this is true, but I read somewhere (rpi forums, a while back) that setting the core_freq to 250mhz might allow for the increased SD card clock and WiFi. As the internal WiFi runs off the SDIO bus ( ), it appears the upped frequency clock kills the WiFi. I have been doing some testing (and repeated re-installing) over the last couple of days on a Pi 3 (with some older 4GB SD cards) and discovered that each time I enabled this in my configuration file, it caused the onboard wifi to disappear. This worked brilliantly on one of my installations (no proof, sorry), but I must reiterate the point that it can cause problems. Many thanks to GTR2FAN on the RPi forums: The Raspberry Pi 3 Model B Q&A thread - Raspberry Pi Forums Ensuring you get the most from your device, and the software you choose to install. What this does is increase the SDcard bus from 50mhz to 84/100mhz.Īfter rebooting your system, simply run dietpi-config and select tools from the menu to run a SDcard benchmark.Īt its core, DietPi is a highly optimized minimal image with various tools, including automated installation and optimizations of optional popular software. #dtoverlay=sdhost,overclock_50=84 #Outdated, but may still be functional For DietPi users, this will need to be applied to the Ramdisk location /DietPi/config.txt. Simply add the following line to /boot/config.txt. Other brand SD card milage may vary, so this is at your own risk. I’ve personally tested on Sandisk Extreme 16GB UHS-1 and UHS-3 cards and can confirm stability. ![]() So please backup your data before hand using dietpi-backup to another location other than the SDcard (eg: USB Drive). Increasing the SDcard clock speed can cause data corruption if the card isnt capable. ![]() Make sure you have at least a UHS-1 capable SD card. ![]()
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