I have the the system with following specs.
Processor : intel (R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz 2.30GHz
Installed memory (RAM) 128 GB
System Type : 64-bit Operating System, x64-based processor
Operating System : Windows 10
Graphics card : NAVIDIA QUADRO M400 4GB
Computer : HP Z840
I found the following render result
File name
Rac_Basic_sample project.rvt
3D View from yard
Image Size 201 x 110
150 DPI High 1min 30 sec
150 DPI Best 19min 03 sec
300 DPI High 3min 50 sec
300 DPI Best 1 hr 15min
600 DPI high 12min 38 sec
600 DPI Best 4 hr 11 min
Any body can inform me that these rendering result are acceptable for my system as per given specs.