Rhino 7 slow, but only in Render mode

Rhino 7 is working great on all files in all modes, except when render is selected. It suddenly grinds to a halt. Very odd because there is still plenty of over head in system memory and GPU mem too. No spikes in CPU.

Sys info here - any ideas are appreciated:
Rhino 7 SR36 2023-12-12 (Rhino 7, 7.36.23346.16351, Git hash:master @ 11a364321297eb8cdb34405a3308d8911f58706d)
License type: Commercial, build 2023-12-12
License details: Cloud Zoo

Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 64Gb)

Computer platform: LAPTOP - Plugged in [100% battery remaining]

Hybrid graphics configuration.
Primary display: Intel(R) UHD Graphics (Intel) Memory: 1GB, Driver date: 11-16-2022 (M-D-Y).

Integrated graphics device with 3 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port
- Secondary monitor attached to adapter port 1
Primary OpenGL: NVIDIA Quadro RTX 4000 with Max-Q Design (NVidia) Memory: 8GB, Driver date: 2-15-2024 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 551.61
Integrated accelerated graphics device with 4 adapter port(s)
- Video pass-through to primary display device

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)
Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High
Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 2-15-2024
Driver Version: 31.0.15.5161
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 8 GB

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 7\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.36.23346.16351
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”

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Hi @lbadmin ,

Navigate to Nvidia Control Panel and under application settings navigate to Rhino and select High-Perfomance (Nvidia GPU)

From your sys info I have a feeling your Rhino is using your motherboard GPU and not your beefy one.

Hope that helps you!

Thank you for that - unfortunately the issue persisted !

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