Motherboard - GPU & PSU Question!

[SilentStorms]

Hello;

I have an x58 Sabertooth Motherboard, which holds my nVidia GTX 570. The problem I am having at the moment is that my games can hardly run with a steady FPS (for example, H1Z1.. CSGO) and has been causing other problems.

The question I have is, If I purchase a GTX 780.. will this be compatible with the motherboard that I have? I have been told two different things;

Yes : Apparently, it will run anything made in the last 5-10 years without a problem
No : It does not have the correct PCI slot? <-- I have no idea about this.

So, is this information correct?

- Also, if it's possible that I can have the GTX 780.. is a 650/750 PSU able to run it smoothly? (Not sure if this makes a difference to power, I'm running with mechanical keyboards, USB mice.. Benq Monitor, Very small blue LEDS in the case..?)

 

[Suztera]

As long you have a pcie x16 2.0 slot, you should be fine running the GTX 780.
A decent 550W psu would run a GTX 780 build. The monitor will have its own power source so it does not factor in with your power supply.