- your own skill and ability
- the performance of your computer
Model Performance Technical Note (you may have accessed this via Subscription, but this is a direct link to the PDF).
The following AUGI forum links may also be of assistance to you:
Revit 2010 - Graphics Cards that work (and those that don't)
Happy with your hardware?
Video card D3D compatibility - Revit 2010 on Vista / Win7
Revit Running on Intel Mac
Non-Mac hardware benchmarks using the 2009 benchmark journal
Rendering speed in Windows 7 64 & Revit 2010 64bit
Feel free to comment if you have any thoughts or recommendations.