Question Graphics card was placed on the slot but it isn't rotating

ronisub48

Honorable
Nov 20, 2018
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I want to use this system for Autodesk Inventor and 3dsMax.
Should I replace this supply with another one?
If so what should the wattage be?
TLDR - You should replace the whole computer.

SFF case can not support full height graphics card in it. It can fit half height graphics cards only.
PSU of your current system is too weak to support desired graphics card.
Your system is very old. Released in 2011.

I want to replace only the power source.Is that possible?
Your motherboard uses proprietary power connectors.
You can not use standard ATX PSU in your system (without specific power adapter cables compatible with your motherboard).
 
I want to replace only the power source.Is that possible?
You'd need to find a Dell PSU, that is compatible with this particular motherboard and case, and is 400 watts or above.

And after you do that, and install the GPU mentioned above...you will be left with a system that is still seriously underpowered for your desired use and software.