I bought a CFExpress to M.2 reader, and I'm thinking I am going to get a M.2 to USB 3 card (which of course would limit the CFExpress reader to USB3 speeds).A CFExpress card uses PCIexpress to communicate with the host (either single or four lane, type dependent).
How do you connect such card to your RPI? If it's a USB3 reader then that bandwith is your limit. I case you have an addon-on card which uses a PCIe gen 2 switch you should be able to run it from PCIe bus .
Make use of a gen3 switch and you can even go faster (but AFAIk no RPi compatible board available so far).
Test the performance of your theoretical 300MBps uSD and report back what you get in real life.
With regards to SD cards, I am not talking about uSD cards. I'm talking about full-size SD cards used in modern digital cameras, specifially SDXC UHS-II cards, which would connect via USB.
Statistics: Posted by oguruma87 — Sun Jan 05, 2025 10:36 pm