Xeon E3-1241V3 + GTX 980 with 650W 80+ Gold PSU?

Solution
For only 1 GTX980? yes it is enough but only if the PSU is from high quality. If you have some cheap 650W PSU, I would have doubts.

BTW, do you have already the E3-1241V3 and GTX980? If not yet, I would recommend to change to E3-1231V3 and GTX980Ti or GTX970.
GTX980 is only 10% faster than GTX970 but cost almost 2x GTX970.
E3-1241V3 is more expensive than E3-1231V3 but the price difference does not bring much.
If you have them already, you are good to go.
For only 1 GTX980? yes it is enough but only if the PSU is from high quality. If you have some cheap 650W PSU, I would have doubts.

BTW, do you have already the E3-1241V3 and GTX980? If not yet, I would recommend to change to E3-1231V3 and GTX980Ti or GTX970.
GTX980 is only 10% faster than GTX970 but cost almost 2x GTX970.
E3-1241V3 is more expensive than E3-1231V3 but the price difference does not bring much.
If you have them already, you are good to go.
 
Solution

The PSU is 650W EVGA SuperNOVA NEX650G 80+ Gold
I picked GTX 980 as example. Also thanks for E3-1231V3, I'll check it out