Hello,
I HAVE PURCHASED NVIDIA GTX 550 TI CARD FOR MY SYSTEM , BUT I AM CONFUSED REGARDING POWER SUPPLY UNIT . I AM PLANNING TO PURCHASE COOLER MASTER 550W UNIT , WILL THAT BE SUFFICIENT
Don't buy coolermaster. Their power supply units tend to be bad. Stick with Antec/Corsair/Seasonic/XFX and get at least 400w unit of said that. That will be sufficient.