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#11
You don not want to use a 550 watt power supply with a 980 or 980 Ti.
I would not go below an 850 for a single card.
EVGA - Products - EVGA SuperNOVA 850 P2 Power Supply - 220-P2-0850-X1
An i5, a ssd, and a 960 and you`ll be flyin :)
If 8 GB ram is the max, you`ll be fine there too.
Get yourself a good set of Corsair Dominator.
CORSAIR DOMINATOR 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 Desktop Memory Model CMP8GX3M2B1333C9 - Newegg.com
The tricky part will be the PSU, but you seem to have it under control, let us know how you make out :)