[PROBLEM] RPi B4 slowdown with using USB 3.0

[DRONE7]

This is a power supply problem well canvassed regarding Pi4.
https://forums.raspberrypi.com/viewtopic.php?t=257220
https://www.reddit.com/r/raspberry_pi/co...e_causing/
https://forums.raspberrypi.com/viewtopic.php?t=248572


"The USB ports on the Raspberry Pi can only supply up to 1.2A from all 4 ports combined (with no per-port limits). That's not enough for two USB powered hard drives. You'll need to power at least one of the drives externally."

Bad suggestion. All you need is the mouse dongle itself. Inserted into USB 2.0 ports, no slowdown, but inserted into a USB 3.0 port, we immediately have a slowdown, and in the case of a mouse, it makes the GUI practically unusable. As a pendrive (32GB, Sandisk, standard an nano model) as mass storage, identical behavior. Of course, it's the same only for the USB SSD itself (no udervoltage warnings). There are no network connections for this case (Local GUI).

Two devices, pendrive and DAC Topping D10s, as long as they are connected to USB 2.0 ports, we have normal correct operation. But it is enough that only one of them (no matter which one) is plugged into the USB 3.0 port and the work of the Raspberry Pi is slowed down. There are no network connections for this case (Local GUI).

The pendrive (and mouse dongle) does not draw more than 1.2A of current from the USB port (just to clarify: no other peripherals connected to the USB ports).



I only see 2 possibilities:

1) A construction error in this initial 4B Raspberry Pi series that interferes with the software (kernel, drivers) which manifests itself in slowdowns, many lags.

2) Damage to the Raspberry Pi I have that causes the software to behave this way.

I don't have a second Raspberry Pi, it's practically impossible to buy (out of stock) and even if they were available, they would be in a different hardware version.

I thought it was a known problem (hence the question here on the forum), testing with buying another (already more expensive) Raspberry Pi is not an optimal solution.

In some time I can do some tests with generating logs. But first, job gains priority.

Bad reply ;-)
So have you ever connected a powered hub between any of these devices and the Pi ?
Have you examined the USB cables for current carrying capacity ?
Have you posted your power supply details for your Pi ?