P1LGRIM: Thank you for lightning fast reply, first of all.
Then: first part definitely worked. Updated to build 17G14033, then downloaded Nvidia web drivers.
Unfortunately: I still see "NVIDIA Chip Model 33 MB" under "Graphics" in System Info.
Details in System Report -> Graphics/Displays:
NVIDIA Chip Model:
Chipset Model: NVIDIA Chip Model
Type: GPU
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 33 MB
VRAM (Dynamic, Max):
Vendor: NVIDIA (0x10de)
Device ID: 0x1b82
Revision ID: 0x00a1
ROM Revision: preset 1.0.0
Displays:
Display:
Resolution: 3840 x 2160 (2160p 4K UHD - Ultra High Definition)
UI Looks like: 1920 x 1080
Framebuffer Depth: 24-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Automatically Adjust Brightness: No
...I'm pretty sure there's something else I'm missing