When you have a USB audio card, the requests it submits to your CPU to fill its audio buffer can be interrupted by the mouse's requests to update cursor position, a USB keyboard's requests to enter key combinations, etc. This is because with most systems, all USB devices end up being processed by the same hub, and each of the devices gets in one another's way. I don't have a USB audio interface (I use a native internal PCIe card, as you can tell on my list), and not having one generally helps with DPC latency. With a short 400 microsecond spike from the nVidia drivers once every 5 minutes or so. My system runs a lot lower steady DPC latency than the screenshot:Ībout 20-80 microseconds with everything hooked up, Instead, it's just a stock photo I grabbed off the web. However, the screenshot I posted isn't of my system. I have my system specs listed on my "Salem Beats Uses." page.
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