That does sound somewhat high. 3D programs are by definition going the be the most taxing things your machine will ever see. So don't be surprised to see abnormally high readings compared to almost any other kind of software you run.
How are you determining the GPU load, meaning, what's showing you that 30% load? Sometimes software sensors for these kinds of things can be incorrect. I have a very high-end mother board and two of the MBs temp sensors have readouts of over 99C all the time. I know by doing other temp measurements that the board is running cool. So I've learned not to trust sensors all the time. But initially, I was alarmed and worried I was burning up the board somehow.
I just opened Max 2018 and put a few objects in a scene. I use 'TechPowerUp GPU-Z' to monitor GPU usage. With an interactive render frame open in Corona, as I pan around, I get between 2% and 12% usage. So your 30% does seem a bit much especially for an empty scene. I might recommend you try a few different programs to read your GPU usage and cross-reference them. If you get lower GPU readings on some of them, then maybe you can infer that your initial readings were really not correct. If you get the same high readings on all, you might want to write Nvidia or at least completely uninstall and reinstall your video drivers.
Rob Holmes

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3ds Max (2023-2025), V-Ray 6.2, Ryzen 9 3950-X Processor, DDR 4 128MB, Gigabyte Aorus X570 Master motherboard, Sabrent Rocket NVMe 4.0 M.2 drives, NVidia RTX 4090, Space Pilot Pro, Windows 11 Pro x64, Tri-Monitor, Cintiq 13HD, Windows 11 x64
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