It would be sufficient , but get a power supply that is Haswell compatible.
Here's 2 made by SEASONIC.
PCPartPicker part list /
Price breakdown by merchant
Power Supply: Antec HCG M 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($64.99 @ NCIX US)
Total: $64.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-01 21:42 EST-0500
or
PCPartPicker part list /
Price breakdown by merchant
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply ($39.99 @ Newegg)
Total: $39.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-01 21:43 EST-0500
Antec
According to Antec, the following units are "fully compatible" with Haswell:
EarthWatts Green: EA-650 Green
EarthWatts Platinum: EA-450, EA-550, EA-650
High Current Game: HCG-750, HCG-900
High Current Gamer M: HCG-520M,
HCG-620M, HCG-750M, HCG-850M
High Current Pro: HCP-750, HCP-850, HCP-1200
High Current Pro Platinum: HCP-1000 Platinum, HCP-850 Platinum (OC link), HCP-1000 Platinum (OC link), HCP-1300 Platinum (OC link)
NeoEco C: Neo Eco 620C
Signature: SG-650, SG-850
TruePower Gold: TP-550G, TP-650G
TruePower New: TP-550, TP-650, TP-750, TP750 Blue
TruePower Quattro: TPQ-850, TPQ-1000, TPQ-1200, TPQ-1200 OC
VP: VP550P V2, VP650P V2, VP650PM
VP F: VP550 F, VP630 F