Unfortunately, Dell has bad quality products. The described Problem with DPC I do suffer as well. Whole system juddering until clock is getting higher.

Dell is a marketing only company without any real electro engineering core competence. Just assembly of electronic components. Just avoid buying any products from Dell.

They had the same issue with the latitude laptops back in 2011. The issue is hardware not software thats why they cannot fix it without recalling and Dell does not do a freebie. Ask for a refund or swap as its a design flaw.

Better use Linux

I got HDMI audio/video syncing out after some BIOS and/or IGPU driver update (near christmas time). A clean W10 + Intel GPU drivers dated somewhere around 2018/8 gives 400-600ms. Using latest available Intel driver latency goes +1100ms.

Yeah, you guys need to put Ubuntu on that thing.  It's been pretty solid

I am really surprised that the author of this article seems to be surprised with Dell's behavior. This is what Dell has been doing for many years now. It is not something new. Dell always has some representatives on social media or their own forums posting things like "our engineers are working on this and that". Most of the times the Dell representative who post these things have no idea what the problem is. And even if they do, they are just trying to calm people down until the new XPS refresh is out. Wake up people. In many cases each individual can take the matter to the next level using some kind of legal avenue. In my case (in Australia) all I had to do was to start a case against Dell at the Civil and Administrative Tribunal. Few weeks after that, Dell gave me a full refund.

With gazillion core CPUs I don't understand the need for DPC?  Aren't drivers threaded or able to take advantage of cores?   This doesn't make sense today.

DPC can be a very, very, difficult problem to solve.  It's usually not the affected driver that's to blame... it's usually something else on the system that's hogging DPC time.

That said, it is usually solvable.  However, in my experience, the OEMs rarely have the in-house staff to do such analysis and come up with solutions.  They rely on their IHVs almost entirely to "do the right thing."  While the IHVs are responsible for systems integration, they rarely do much of it at the driver level.

So... Dell's a good outfit but... good luck.

It's windows drivers.

I have given up since the last set made the audio genuinely unlistenable, with crazy reverb echo etc.

Linux on, and whilst the speaker sounds "more bland" , aka no real fiddling effects, it's rock solid.

The lack of S3 suspend state sucks though, but that's ok, at least I can use my machine

It's absolutely unforgivable if Dell does not solve this at once! I bought my xps 9570 for audio production, and it's useless because of its Dpc latency, and I am very angry!!!
If dell does not correct that huge issue, I will keep on telling all the people I meet to never buy any Dell computer!! :(  :(  :(