New Life in an FX Gaming Rig?

I have two FX rigs, one is my current gaming rig and the other I use for a Hyper-V test rig. See below for specs:

Gaming: Gigabyte 990FXA-UD3 | AMD FX 8320 | 8GB G-Skill RAM | GTX 970 | EVGA 750w PSU
Hyper-V: Gigabyte 990FXA-UD3 Ultra | AMD FX 8320e | 24GB G-Skill RAM | Nvidia GeForce GT 710 | Corsair 650w PSU

I game at 1920x1080, which is 1080p unless I am mistaken

I play old bloody games (CS:Source, Half Life 2 mods) so the gaming rig ran it all fine. I got into PubG and it is actually quite playable if I scale things down a bit but I obviously don't know what I'm missing.

My question is this: with the GTX 1080 dropping in price should I pick one up for $350 or so (I have about $100 in credit card rewards I could put into a video card) and drop it into either of the above rigs? Or is that needlessly dropping new money into old hardware? I figure if I get a 1080 now I can eventually upgrade to a new gaming rig plus new monitor over the next few months.

I know the FX series is old balls but it plays everything I want and at 6 years I might as well use it until it burns out. I figure a new rig/monitor all at once is going to run ~$1500 which I technically could swing but should probably save that money instead.

Fake Edit: I know the FX series got a lot of hate but damn that thing has done everything I wanted to do and just won't die.

16gb of Ram, and make sure it's overclocked. They are still decently fast enough. A GTX 970 shouldn't look potato with PUBG unless something is wrong.

A 970 is about 1060 3gb as far as performance, and your CPU while slower should still feed those cards just fine

This is what I have for RAM. Never got into overclocking, not sure if this RAM can be tweaked or if swapping it out would be better. I can drop this stick into my Hyper-V rig and juice that to 32GB.

That would definitely work. I ran a 8350 up tip last December and then I put it in my kid's PC which is playing games fine. Obviously a 1080 paired with a 8350 isn't ideal but it'll still be a very nice upgrade in performance. Then later on down the road when you get some more cash, you can move up to a better CPU and see a little more out of the 1080.

Also, put an overclock on that 8320. It should easily do 4.2 and that will help. You'll need to beef up the cooling tho but hell, a Cooler Master Hyper 212+ will handle a 4.2 8320 overclock (I know cause I had one that did 4.2 on a FX-8150 which run even hotter) and they run around $30.

^that's a good plan, something id do. I had a 8120 @ 4.5 with a 212 evo before I added water and pushed it too hard...

An FX 8320 + 1080 seems like a mismatch to me. Better to spend the money on a faster cpu and keep your 970. An i3-8100 + 16GB Ram + Hyper 212 for $342

https://pcpartpicker.com/list/JMrWJ8

Thanks for the feedback folks. I'll work on overclocking this guy. I've been saving my pennies so maybe I'll jump on a new build around Black Friday/Cyber Monday time.
I grabbed Battlefield I for $10 so I'll see how this behaves on my rig.

EDIT: Already have a Hyper 212+ for cooling so definitely good there.