Here is the diagnostics log:
This Direct3D graphics driver is Microsoft WHQL certified
Graphics Hardware Description:
NVIDIA GeForce GTX 1080 Ti
AIRViz Device Manager \ VirtualDeviceDx11
Feature Level 5_0
Conservative Mode
Optimized Software Renderer
OGSScene.dll
Graphics driver file C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll is version 23.21.13.9101
The display is using 32-bit color
Inventor Version:
Build: 227, Release: 2018.2.3 - Date: Tue 01/16/2018
64-Bit Edition - 131072.00 GB
Loaded Inventor Add-Ins:
Assembly Bonus Tools
Simulation: Dynamic Simulation
Simulation: Frame Analysis
iCopy
Electrical Catalog Browser
System Information:
Operating System: 64-bit Microsoft Windows 10 Pro (Build 9200)
Language: English
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: 0606
Processor: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz (1 processor, 6 physical cores, 12 logical cores)
System Memory: 15.940 GB RAM
Graphics Device Information:
Renderer: SW
Manufacturer: NVIDIA
Chip Type: GeForce GTX 1080 Ti
DAC Type: Integrated RAMDAC
Graphics HW Memory: 10.866 GB
Display Mode: 3440 x 1440 (32 bit) (120 Hz)
Graphics driver file: C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll
Driver file version: 23.21.13.9101
Driver Date: 23 February 2018 0:00:00 UTC (Coordinated Universal Time)
Direct3D Graphics Device Information:
Adapter Description: NVIDIA GeForce GTX 1080 Ti
Vendor ID string: 0x000010de
Device ID string: 0x00001b06
VendorID: 10de
DeviceID: 1b06
SubSystemID: 66963842
Revision: a1
Direct3D 10 / DXGI System Information:
Dedicated Video Memory: 10.866 GB
Dedicated System Memory: 0 MB
Shared System Memory: 7.970 GB
DxDiag System Information:
Operating System: Windows 10 Pro 64-bit (6.2, Build 9200) (16299.rs3_release.170928-1534)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: 0606
Processor: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz (12 CPUs), ~3.7GHz
System Memory: 16384MB RAM
Page File: 9818MB used, 8936MB available
DirectX Version: DirectX 12
DxDiag Version: 6.02.16299.0015
DxDiag Graphics Device Information:
DirectX Version: 12.0
DDI Version: 12
DDI Version Number: c
DxDiag WHQL Level: 0
Driver Signed Valid: True
Driver Signed: True
Manufacturer: NVIDIA
Chip Type: GeForce GTX 1080 Ti
DAC Type: Integrated RAMDAC
Revision: Unknown
Graphics HW Memory: 19288 MB
Display Mode: 3440 x 1440 (32 bit) (120Hz)
Graphics driver file: C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_048172e9d7cc483d\nvldumdx.dll
Driver file version: 23.21.0013.9101
Driver Date: 2/22/2018 7:00:00 PM
WHQL Level: 1
Inventor Options Information:
Options = 0x00000000
Warning Options = 0x00000000
Graphics driver log information:
1) My particular chipset auto-disables iGPU the moment a dedicated graphics card is installed, but I went ahead and manually chose PCI-E from the graphics management tab of my BIOS.
2) I manually added Autodesk Inventor to the Nvidia Control Panel then > Manage 3D Settings > Program Settings > Autodesk Inventor > Power Management Mode > prefer maximum performance.
This seems to have corrected the issue for now. If it pops up again I will update.
Thank you all!