James added a new video card and needs to get a power supply that will have enough power to run the new card.

When researching the new power supply, what feature does James need to look for to make sure he has enough power to run his computer with the new video card?

a. Form factor
b. Wattage
c. dual voltage option
d.80 Plus Gold rating

B) Wattage

Explanation:

Looking at the question's statement, it is self explanatory.

"James needs a power supply that will have enough power to run the new card."

The above statement clearly says that James needs to look for the Wattage (which simply means power, because it is the unit of power).

Form factor will show only the shape and general physical layout of the power supply.

Dual Voltage option will give only the option of supplying two different voltages at a time and nothing about the power that James needs.  

80 Plus Gold rating will show that efficiency of the PSU (power supply Unit) is up to 87% at 100% load.

b.Wattage

Explanation:

Out of all the factors that are important for a power supply the wattage and quality of the supplier is are the most important. It is because if the wattage of the power supply is low or not enough it can end up frying several components of the PC. Suppose your card with all other components consumes 430W of power and you hook up the PC with a 300W power supply. The PC components strive for power and fry themselves up completely. The 80 plus Gold Ratings and other things are just for publicity. In facts there are power supplies of less wattage are available with 80 plus rating.