Well mobo ram cpu - 500-600 or so for high end
gpu - 200 on low end.

Running three screens on a 270 is just wow in itself.

No need to replace ssd/psu/case.

they're 3x 20", I'm not sure if that makes it any better
Could I just get 2x 4gb more ram and keep the current ones I'm using?
Could I purchase a second graphics card and use 2x at the same time?
I'm assuming I should go for intel this time, would you recommend i7 over i5? is the difference significant?

Thanks for the help and apologies for my lack of knowledge with computers.

new mobo will require new ram.
your not buying used i suspect.
2x 270 is still shit.
buy i5 unless streaming.

https://pcpartpicker.com/list/qrZ3WD

This post was edited by King Atrhur on Sep 11 2018 08:52am

great thank you so much. and this will support 3 monitors? what if I wanted to add a fourth?

The 680 was the first to support 3 monitors by itself. (nvidia)
Since then I'm pretty most cards support as many monitors as they have outputs for.
Though you may need adapters and I highly suggest you play on 1 screen and not a surround layout as even the 1050ti will struggle with this.
I use a 1070 atm with tri 1080p monitors and I barely keep 60fps in most titles.

Additionally the mobo may have a onboard video you can set a 4th screen to or keep the 270 and have that rune 1-2 screens.
contact yupitsmeh for help on this, I've always done it with a single gpu.

This post was edited by King Atrhur on Sep 11 2018 10:24am