DAX has very high CPU utilization

KD4UNX

Hey, all. I did some searches about this but seem to only find old posts.

After firmware version 4 came out, I upgraded my radio and Windows 10 laptop to the v4 firmware, but it never worked properly on my laptop, so I downgraded radio and SmartSDR to v3.10.15.

Ever since then, DAX takes 40-50% of CPU. I have worked with ChatGPT today for several hours, but I don't seem to be any closer to getting this resolved. I have uninstalled and reinstalled SmartSDR, the DAX drivers, the devices, and many other things countless times today.

I finally have SmartSDR taking only 5-10% of CPU, where it was taking 40-50% earlier.

Now, before I did the v4 upgrade, my Lenovo L470 worked fine. All I use it for is Winlink Wednesday, so I launch SmartSDR (+ DAX + CAT), then I launch Winlink Express. From there I launch Winlink Vara, which launches VARA HF. All of this worked before the v4 upgrade.

ChatGPT suspects that SmartSDR and DAX are not using the GPU (mine is an Intel 510), but I did confirm that SmartSDR is allowed to use the GPU in performance mode (not limited mode).

Anybody have any suggestions on what I should do here? I'm really a Unix & macOS guy, and only use this one Windows system for only this one purpose, and I really don't know where to go from here.

Thanks.