Dell offers Win 11 drivers for Intel UHD730 Graphics for the Inspiron 3910 so it complies with Win 11 requirements. Why are you worrying about 128 MB of RAM dedicated to UHD 730 Graphics? You didn't mention how much total system RAM you have in this PC, but even if you have only 4 GB total RAM installed, 128 MB is less than 4% of the total The UHD Graphics is sharing 3.712 GB of total RAM so if your system has 4 GB or 8 GB total, that might be an issue. Your add-in card probably has it's own RAM, so doesn't need to share as much system RAM, and that might explain why it's not freezing. Are all your drivers and firmware up-to-date? You can run SupportAssist which Dell installed on this PC to see if there are any updates needed. Otherwise, go to the Support site and enter your Service Tag (Don't post it here.) and manually check to make sure all your drivers are current.  
Hi All, I experienced a rather strange problem but I solved it. I wonder if any other person have faced the same. I just bought a Dell Inspiron 3910 with 512 SSD and onboard Intel UHD 730 graphic Card. When surfing the internet or just being inactive on the desktop the whole system freezes. Can't do anything. I have the machine now for 2 weeks and according to the log I've done already more than 65 hard reset. After looking at the Intel UHD 730 card properties it's telling me that 128 MB is dedicated to the Card memory and 3712 MB shared. The 128 MB worried me, so I put in my old car AMD ASUS 5450 silent. Installed the drivers of W10 (no drivers for W11 available). Now my dedicated card memory is 1024MB. I noticed my memory stays now under 53% and no more freeze of the entire system. Am I correct to say that the intel UHD 730 performance is not complying with the W11 and system requirements? I'm asking this question just because there are no updates available anymore for the AMD ASUS card.  Many Thanks
Onboard Graphic Card Intel 730 with Dell Inspiron 3910