[ Need Help ] my career crash then pc restart

[Talk Back And Your Dead]

anyone here having the same problem and already discovered the solution?
I tried different settings and refresh rate and already tried forcing vsync via gpu but no luck.
or it has something to do with my power supply?

My gpu is sapphire radeon 5850 and my power supply is 400watts true rated psu.
I read in my gpu website that 500watts is required for this type of gpu but other games are working fine and only my career in nba2k15 is having with this type of problem.
quick game is working fine.


thank you in advance!