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I think you might be making a confusion here. I have an AMD Ryzen APU laptop also with 32GB of RAM and also with Windows 11 and yes just like in your case, it

I think you might be making a confusion here. I have an AMD Ryzen APU laptop also with 32GB of RAM and also with Windows 11 and yes just like in your case, it says in task manager GPU tab that 16GB are shared GPU memory, but like the name says, it's shared and not reserved, meaning the GPU can use up to 16GB of system RAM for textures and stuff but CPU apps are allowed to use nearly all the 32GB of RAM minus what you reserved exclusively for the GPU in BIOS and what the GPU is currently using on top of that. And I know because I saw apps (not games) use nearly all my 32 gigs of ram.

qwertox 3y ago
But then why do my apps not use more than 16GB RAM? Everything together never surpasses 16GB RAM (maybe a bit, because it gets compressed). And in the meantime the GPUs show <1% RAM usage. And Ubuntu has no issues with it, while Windows crawls on its knees once that limit is reached.
- FirmwareBurner 3y ago
  No idea. Maybe a driver issue. Have you played around with drivers? From Dell's website versus Intel's website. Have you tried a fresh install of Windows 11 and not an upgrade from 10? Ask on the Dell forums or subreddits. Maybe there's others out there with this issue.
- Cheer2171 3y ago
  Often that reserved memory is a soft limit that programs try to respect, but they can force allocate more. So what happens when you disable page file, close everything, open python3, and type this? array20gb = bytearray(20 * 1024**3) This should allocate 20GB of RAM to that process, starting with unused unreserved RAM, and then it should take your shared video memory after the unused unreserved RAM is allocated. If you get an error, then you know that reserved video RAM can't be used by programs.
  - qwertox 3y ago
    Thanks! This is odd, and indeed it does start filling the RAM. What could it then be what hinders the allocation of more than 50% under "normal operation". Initially it's fast, but over the course of a couple of hours if gets so low, that it takes around a minute to open a folder from the desktop via double-click while memory is at 50%. Temps are OK at that time and nothing is really getting used, like SSD is at 1-5%.
- ogurechny 3y ago
  Probably system or driver issue resulting in lending/grabbing the maximum amount for no reason. Performance-wise, 4 GB dedicated video card gets no benefit from those extra gigabytes in RAM buffer anyway. Do Quadro cards support some kind of “fat and slow” compatibility mode for software that demands giant memory size on a professional card to fit all the data there, and can wait to get the results? Maybe there's some switch you've toggled to enable “20 GB VRAM” mode?
  - FirmwareBurner 3y ago
    You see? Bullshit issues like these is why I don't buy laptops with discrete GPUs anymore, especially Nvidia.

qwertox 3y ago

But then why do my apps not use more than 16GB RAM? Everything together never surpasses 16GB RAM (maybe a bit, because it gets compressed). And in the meantime the GPUs show <1% RAM usage. And Ubuntu has no issues with it, while Windows crawls on its knees once that limit is reached.

FirmwareBurner 3y ago
No idea. Maybe a driver issue. Have you played around with drivers? From Dell's website versus Intel's website. Have you tried a fresh install of Windows 11 and not an upgrade from 10? Ask on the Dell forums or subreddits. Maybe there's others out there with this issue.
Cheer2171 3y ago
Often that reserved memory is a soft limit that programs try to respect, but they can force allocate more. So what happens when you disable page file, close everything, open python3, and type this? array20gb = bytearray(20 * 1024**3) This should allocate 20GB of RAM to that process, starting with unused unreserved RAM, and then it should take your shared video memory after the unused unreserved RAM is allocated. If you get an error, then you know that reserved video RAM can't be used by programs.
- qwertox 3y ago
  Thanks! This is odd, and indeed it does start filling the RAM. What could it then be what hinders the allocation of more than 50% under "normal operation". Initially it's fast, but over the course of a couple of hours if gets so low, that it takes around a minute to open a folder from the desktop via double-click while memory is at 50%. Temps are OK at that time and nothing is really getting used, like SSD is at 1-5%.
ogurechny 3y ago
Probably system or driver issue resulting in lending/grabbing the maximum amount for no reason. Performance-wise, 4 GB dedicated video card gets no benefit from those extra gigabytes in RAM buffer anyway. Do Quadro cards support some kind of “fat and slow” compatibility mode for software that demands giant memory size on a professional card to fit all the data there, and can wait to get the results? Maybe there's some switch you've toggled to enable “20 GB VRAM” mode?
- FirmwareBurner 3y ago
  You see? Bullshit issues like these is why I don't buy laptops with discrete GPUs anymore, especially Nvidia.