Hi @Anonymous
Sorry to hear about your slow down issues especially while rendering in in the realistic mode.
By default the realistic mode significantly slows down model navigation, especially in detailed models since this mode uses the render appearance asset defined in each material.
I recommend that you follow Best Practices: Render Performance and the Building Model. Click HERE for more information.
- Hide unnecessary model elements
- Change the detail level
- Reduce the view area to render
Please see system requirements for the Revit product line HERE
Autodesk tests system hardware, graphics hardware and drivers. Check HERE for more information on graphics cards.
RECOMMENDED GRAPHICS SOLUTIONS FOR AUTODESK REVIT
Click HERE for more information on NVIDIA recommendations.
Let us know if you were able to resolve your issue. Glad to help if you have any more questions!
Please mark this response as "Accept as Solution" if it answers your question. Kudos gladly accepted.