I use 30cm Startech USB3 cables with a Kingston CF/SD/microSD card reader on my laptop to reduce data corruption. Low quality portable USB3 hard disk disk caddies come with thin spindly 0.5m (1.5ft) leads which should be consigned to the garbage bin. Most high quality USB-C portable SSDs come with very short cables, typically 20cm (8in) long. This is because you have reduced or entirely removed undesirable cable effects from the equation.Īlthough you cannot do much about the USB3 cable inside the computer up to the front panel, you can shorten portable HDD/SSD cables to the absolute minimum. In theory you can transmit USB3 over much longer cables, but in practice, shorter = better.Īs you've discovered, connecting your USB3 devices to the rear panel usually results in success. This doesn't affect low speed USB2 waveforms to anywhere near the same extent as much faster USB3 waveforms. ![]() If you add another 30 to 50cm (1 to 1.5ft) of external cable to a portable hard disk or SSD, you've doubled the crosstalk and further degraded the digital waveforms with even more cable capacitance.Ī point comes where the relatively "clean" square waves of the USB3 digital signal at the mptherboard are reduced to "sine" waves at the end of 60 to 100cm (2 to 3ft) of wire. It's probably down to long cables with the associated increase in crosstalk between adjacent (unscreened) wires.Ī typical computer case has over 30cm (1ft) of cableform between the motherboard and the front panel USB ports.
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