Recommend a psu for this build?

[Vexsilver]

This is my current set up:

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
Motherboard: Asus Maximus VI Hero ATX LGA1150 Motherboard
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory )
Storage: Samsung 840 Series 120GB 2.5" Solid State Drive
Video Card: Sapphire Radeon HD 7870 GHz Edition 2GB Video Card
Case: Cooler Master CM 690 II (Black) ATX Mid Tower Case
Power Supply: SeaSonic G 550W 80+ Gold Certified Semi-Modular ATX Power Supply


I am considering upgrading my gpu to a GTX980 OR a 970 (leaning to 980), but one thing I'm still not sure on is just how to know how much wattage I would need in a psu. I'm not too keen on sli so I'd really like just 1 gpu to deal with.

Also if anyone knows with my current cpu, when would it start to bottleneck? Would I need to consider upgrading to an i7 or would that one be fine?

I mostly only game at 2560x1440 res and I just want to keep this gpu for a while. My current gpu chugged quite a bit with farcry4 but it was still fun at 20ish-40ish fps and Im sure witcher 3 is just going to kill it...hell it wasn't running witcher 2 anywere near 60fps at 2560x1440 with no uber aa on.

 

[bignastyid]

Your current PSU will run a GTX 980. 4670k won't come close to bottlenecking a single 980.

 

[socialassassin]

7870 Ghz and a GTX 980 probably use about the same amount of power so your PSU should be fine. Keep your CPU as well, not much advantage in upgrading to an i7.

 

[Vexsilver]

No kiddin seriously? I was sure I'd have to upgrade my psu with what I was reading.

 

[socialassassin]

GTX 980 TDP: 165 Watts
7870 GHz TDP: 190 Watts

The 900 series is very power efficient.