It’s no surprise that NVIDIA is gradually dropping support for older videocards, with the Pascal (GTX 10xx) GPUs most recently getting axed. What’s more surprising is the terrible way t…
A USB host providing more current than the device supports isn’t an issue though. A USB device simply won’t draw more than it needs. There’s no danger of dumping 5A into your 20 year old mouse because it defaults to a low power 100mA device. Even if the port can supply 10A / 5V or something silly, the current is limited by the voltage and load (the mouse).
Well, regardless, the spec only cares about devices drawing more current than the host can supply, and that has always been consistent. Electricity doesn’t really work in a way the host can “push” current, the only way it could do that would be with a higher voltage, which would damage anything not designed for it. But that’s what the USB-PD spec is for, negotiating what voltage to supply, up to 48V now.
A USB host providing more current than the device supports isn’t an issue though. A USB device simply won’t draw more than it needs. There’s no danger of dumping 5A into your 20 year old mouse because it defaults to a low power 100mA device. Even if the port can supply 10A / 5V or something silly, the current is limited by the voltage and load (the mouse).
Well, the original comment was about “pushing more current through than the spec”, and that’s pretty much what we did…
Well, regardless, the spec only cares about devices drawing more current than the host can supply, and that has always been consistent. Electricity doesn’t really work in a way the host can “push” current, the only way it could do that would be with a higher voltage, which would damage anything not designed for it. But that’s what the USB-PD spec is for, negotiating what voltage to supply, up to 48V now.