Connect a GTX 780 to a 4K display

[unplanned bacon]

First off, which version of HDMI is on the back of the 780? I think it's most likely 1.4

Do I need an HDMI 2.0 cable for 4K resolution or can I keep using my existing cables

If I plug an HDMI 1.4 cable into an HDMI 2 port, what'll happen? What if I plug an HDMI 2.0 cable into a 1.4 port? How will the 360 and PS4 handle this? The 360 won't support 4K in any way, I know that.

I know my GTX 780 won't push 4K gaming at high frame rates. I'm thinking I'll do 1440p or 1080p upscaled for games and run everything else at 4K like (IIRC) some of the consoles do until I get a 1080 or something.

I found out what was causing my integrated graphics issues yesterday, thanks to my PS4 also having issues with my TV. My 1080p TV is not working correctly. It won't accept integrated graphics from my PC, my 360 can't determine what my TV can do so it gives out 480p with no sound and my PS4 gives out no sound on it and says none of the resolutions are supported (it still outputs 1080p). They all (haven't tested the 360, but it probably still works) work on the TV downstairs just fine so I need to change out my own. I don't want to do a stop-gap solution of getting a 1440p monitor and then upgrading later to 4K as I'd spend more

 

[G-star93]

first off, 780 has 1.4hdmi. Yes you need HDMI 2.0 for 60hz 4k, otherwise you will just have 30hz which is unplayable. You won't get any playable frame rates on 780 aswell. Xbox 360 doesnt support even 1080p so forget about 4k on xbox, as for ps4 if you don't have the pro version also forget about 4k. And I believe you also need 4k TV with HDR. You'll be better of buying 1440p monitor, it's the sweet spot for gaming, because it's still to early for 4k gaming, graphics cards are still not strong enough, but if you are willing to spend alot of money on let's say gtx 1080 sli or titan XP sli then go for it, otherwise stick to 2K for now.

 

[unplanned bacon]

first off, 780 has 1.4hdmi. Yes you need HDMI 2.0 for 60hz 4k, otherwise you will just have 30hz which is unplayable. You won't get any playable frame rates on 780 aswell. Xbox 360 doesnt support even 1080p so forget about 4k on xbox, as for ps4 if you don't have the pro version also forget about 4k. And I believe you also need 4k TV with HDR. You'll be better of buying 1440p monitor, it's the sweet spot for gaming, because it's still to early for 4k gaming, graphics cards are still not strong enough, but if you are willing to spend alot of money on let's say gtx 1080 sli or titan XP sli then go for it, otherwise stick to 2K for now.

I forgot about things like HDCP. How did buying TVs become more confusing than buying computer parts?