Reddit reviews XFX XTR P1750BBEFX 750W Easy Rail Plus Power Supply with Full Modular Cables

https://www.amazon.com/XFX-P1750BBEFX-Supply-Modular-Cables/dp/B00B88Z314

I've got a mild 2600 OC and UV vega 64 pulling 400 at the wall. I could max the vega and a 2700X under that with room to spare.

XFX 750w

I replaced that ps4 with this;

XFX PRO 750W Black Edition Single Rail Power Supply with Full Modular Cables ATX 750 Energy Star Certified Power Supply, P1750BBEFX https://www.amazon.com/dp/B00B88Z314/ref=cm_sw_r_awd_ksPdvb1MMM53T

Also got a total of 16gb of ram, otherwise I'm about at my limit otherwise.

nah i don't really care for looks. And i picked the wrong psu its actually this one :

https://www.amazon.de/XFX-P1-750B-BEFX-Gold-PC-Netzteil-4-polig/dp/B00B88Z314?tag=logicaincrem-21

OK so the cheapest quality PSU Id go with is this:

Seasonic Focus+ 550

The next step up would be this:
[XFX XTR 650w](
https://www.amazon.de/gp/offer-listing/B00I5HF0KU/ref=dp_olp_new?ie=UTF8&condition=new)
but its not sold by amazon,its a 3rd party seller and I think with shipping cost it might end up more expensive than the next choice PSU which brings us to this:

XFX XTR 750W


All of these PSUs are Seasonic OEM,Gold rated for efficiency,full Japanese capacitors fully modular, great price/performance ratio.

Reviews:

https://www.hardocp.com/article/2018/10/17/seasonic_focus_plus_gold_550w_power_supply_review/

https://www.techpowerup.com/reviews/XFX/XTR650/11.html

https://www.hardocp.com/article/2014/03/06/xfx_xtr_750w_power_supply_review/

This was my first build, and I'm having a hard time understanding what my rig can handle.

GPU: GTX 780 Classified

Monitor: BenQ XL2420Z 144hz

Ram: G.Skill Ares DDR3 (2x4GB)

Motherboard: Gigabyte GA-Z87X

PSU: XFX PRO 750W

CPU: Intel Core i5-4670K

H100i for cooling and SSD/HDD for storage

My goal is 3-4 monitor + TV set up once I move to a place with more space in the near future, running any game 60+ fps across the multiple screens. Currently all is awesome on one screen. However, Linus tech tips makes me want more..like higher than 1080p

Questions: Second GPU or overclock current Gtx 780? If 2nd GPU, need new higher wattage PSU? And, am I stuck mirroring the Gtx 780, or is pairing with slightly better one ok? I get that the slower one limits...uh...things...

Mixing new IPS panel(s) with current TN panel seem weird?
Upgrading to 2-3 of these 1440p monitors seem like too much? Feel like mismatched screen sizes would be irritating.

I realize these may not be very 'simple' questions. All input appreciated.

When I saw the picture of the RAM, I figured as much. I say go for it! As far as the PSU goes, this is 100 watts more (SLI in the future) and is essentially a rebadged seasonic, so it's got solid components (plus a 5 year warranty).