This is popped up periodically in past versions (hard to say when because I'm not always working at this res). I'm working in version 2020.1.5 of standalone and Maya plugin:
In Maya Plugin:
1. Render frame at 8000x8000px and it renders fine
2. Render frame at 8500x8500px and it gives memory error and won't render (not sure the exact
dimension that this error start to show up.)
3. Check GPU-Z for VRAM usage, and it shows I am not out of vram
4. Turn on Out of core to 48gb of ram. Render still fails
In Standalone (2020.1.5):
5. Export scene and render in standalone.
6. Render at 8500px and it renders fine
6. Render at 14,000x14000 and it renders fine
7. Render at 25,000x25000 and it renders fine