Upgrading components: Power Supply requirement?

[William Park]

I've been using a TX 650M as my PSU for the past 2 years on this rig:

i5 4670k OC'ed to 4.4GHz, Hyper 212 EVO
Asus GTX 770 2GB
Maximus VI Hero
8 GB Corsair Vengeance RAM

Long story short, new games coming out, new cards, and a new job has sparked a upgrade frenzy, so to speak.. this is my current one (still WIP on some components)

i7 4790k
EVGA GTX 980 Ti
MSI z97 Gaming 5 (I know this upgrade is unnecessary, but my VI Hero has been faulty for a while now.)
8 more GB RAM G Skill Ripjaws

My only question is: since I'm upgrading the CPU/GPU, would I need to upgrade the PSU as well?
I know 850W is overkill, but should I at least go for 750? or stick with 650? I have heard somewhere that using TOO much watts is detrimental overall, so I want to get this right. Thanks for reading!

 

[C12Friedman]

Stick with the TX650M, it should provide good service for a few more years I would expect. It's got plenty of power for what you show.

 

[William Park]

Stick with the TX650M, it should provide good service for a few more years I would expect. It's got plenty of power for what you show.

Thanks for the quick and easy reply!