Benchmark DAC3 USB is defaulted to v1.1 (likely the same on DAC2). You may need to switch to USB 2.0 on the DAC. On my DAC3B I had to hold 2 buttons (input + lock) down for 5 seconds and the DAC switched to USB 2.0.
I am using a Sonore microRendu to the DAC but it should be the same situation for you.
I am using a Sonore microRendu to the DAC but it should be the same situation for you.