If I'm remembering correctly, the Pi's SD reader runs at 50MHz, doing 4-bit transfers, and not using any of the UHS signaling methods, because those use 1.8V si

If I'm remembering correctly, the Pi's SD reader runs at 50MHz, doing 4-bit transfers, and not using any of the UHS signaling methods, because those use 1.8V signals that the Pi isn't set up to use for SD. > kind of makes the tests useless if you want to figure out which cards are faster But...which card is faster in a USB3 UHS-III transfer isn't useful information for a Raspberry Pi benchmark. It would certainly tell you which cards are faster, but the info wouldn't be directly applicable to what the tests are trying to measure.