I found a small issue and i wondering if it will be fixed somehow
I have my D4 capped at 100fps and for example - in the city, i have ~70-80% of GPU utilization
But, suddenly, when i open inventory or vendor - gpu ut. raises to 100% with fps drops to 80-90
It’s not a big deal to be honest but it shows - how optimalization looks like in D4
Why “UI” is so resourse-needed ? It really needs to compute my crap items in inventory so hard ? 
I mentioned this multiple times now but I watched my GPU usage go up over time.
On early release my GPU was about 55-60%. After around June 8th it went up to 70%. A lil while later it never dropped lower than 80% and now it’s consistently 80-90%.
Also frame crap via Riva Tuner 100FPS at 3440x1440p on a 3080 24gb, 13600k, 64gb RAM.
The inventory and load-like stutters have only gotten worse also.
it’s a widely known bug, there’s multiple topics on that matter
As you stated it is indeed due to the UI in general (vendors , inventory, chest…) and yes it is indeed problematic.
hopefully they’ll fix it soon
for now im playing at a low fps cap of 60 just in case.
Just wondering did you guys download the high res version of the game? If so you might want to reduce the fps until a solution can be found so you don’t cook your gpu.
I keep watch on temps too. GPU is 70C which is fine. Just being over used.
CPU is asleep. Always has been at 8-16% usage. Never over 30% on any core.
Not sure your computer specs are but when I run the game all ultra settings 240FPS it barely pushes my GPU 30% & my temps never reach over 50c. Sounds though like a driver issue, if you have nvidia I would run nvidia clean up utility/tool to remove all the previous drivers over the years that were installed on the PC & current ones. Then download the latest driver and install it. Also make sure windows update doesn’t try to auto install w/e driver it wants.