# QA403 ADC overflow **URL:** \ **Category:** QA40x\ **Created:** [April 20, 2026, 4:46pm UTC](https://forum.quantasylum.com/t/qa403-adc-overflow/2264 "2026-04-20T16:46:30Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@matt](https://forum.quantasylum.com/u/matt)\ **Post date:** [April 27, 2026, 9:45pm UTC](https://forum.quantasylum.com/t/qa403-adc-overflow/2264/5 "2026-04-27T21:45:29Z")
Hi @tspacker, you might see if your bios has an update available. See thread below. > [@QA403 non-voltage related dropouts](https://forum.quantasylum.com/t/qa403-non-voltage-related-dropouts/1733/10): > > Hi @DaveD, thanks for the update! I think the focus should be getting 48k pristine, and then moving on to other sample rates. The USB code in the releases hasn’t been touched in a long time, so I don’t think you’ll see a difference bouncing between the various recent releases. First, can you verify that the USB voltage reported by the QA40x app isn’t showing orange or red? This can be done with a 20 awg cable as you’ve done and if that isn’t solving the issue completely, then try using a powere… --- _[View the full topic](https://forum.quantasylum.com/t/qa403-adc-overflow/2264)._