hdmi 1.4 support 1080p @ 120hz?

[Kickflapper]

do i need hdmi 2.0 to get 120hz @ 1080p or will 1.4 work?

[don_svetlio]

Just now, AlexTheRose said:

You need 2.0, sorry.

Or just DVI or Display Port

[don_svetlio]

3 minutes ago, Kickflapper said:

do i need hdmi 2.0 to get 120hz @ 1080p or will 1.4 work?

 

1 minute ago, AlexTheRose said:

You need 2.0, sorry.

Yes it does actually - look
https://en.wikipedia.org/wiki/HDMI#Version_1.4

[don_svetlio]

1 920×1080 resolution at 120 Hz

No

No

No

No

Yes

Yes

[don_svetlio]

1 minute ago, AlexTheRose said:

Looks like only 1.4b supports that though.

1.4, 1.4a, 1.4b - all are listed as one

[don_svetlio]

Just now, AlexTheRose said:

I know, but if you read the section on HDMI 1.4 you would see that they added 1080p@120Hz in 1.4b, not 1.4 or 1.4a.

Buth those are listed as supporting it

[mikat]

23 minutes ago, Kickflapper said:

do i need hdmi 2.0 to get 120hz @ 1080p or will 1.4 work?

1.4 will work because

4k @ 30 hz

4k has 4x the pixels of 1080p

30*4=120

1080p @ 120hz works

[WhackingCheese]

13 minutes ago, mikat said:

1.4 will work because

4k @ 30 hz

4k has 4x the pixels of 1080p

30*4=120

1080p @ 120hz works

Not necessarily the case. For example. I have an old laptop with DisplayPort 1.2 a/b (dont remember), DVI-SL, and hdmi 1.4 and it is capable of doing 1080 at 120hz through all of the outputs (theoretically) but is completely unable to do 4k at 30 or 24hz. This is because of the internal circuitry of the laptop. It contains a mobile pci-express module graphics card also known as MXM the card has 4 displayport outputs going from the card through the mxm connector. (DP is converted internally to DVI HDMI and such). All theoretically able to push 4k at 30hz but it is all routed through the intel hd 4000 graphics which are capable of a max resolution of 2560 x 1600. Regardless of the available bandwidth it is unable to output 4k at 30hz but is able to do 1080 at 120hz. So this is more complicated. Obviously this isn't a problem with desktop graphics due to the way they work; having the display connectors on the card. But it is a thing and this isnt as simple as some of you think it is. 

Tl;DR it's not as simple as you think it is

[mikat]

24 minutes ago, WhackingCheese said:

Not necessarily the case. For example. I have an old laptop with DisplayPort 1.2 a/b (dont remember), DVI-SL, and hdmi 1.4 and it is capable of doing 1080 at 120hz through all of the outputs (theoretically) but is completely unable to do 4k at 30 or 24hz. This is because of the internal circuitry of the laptop. It contains a mobile pci-express module graphics card also known as MXM the card has 4 displayport outputs going from the card through the mxm connector. (DP is converted internally to DVI HDMI and such). All theoretically able to push 4k at 30hz but it is all routed through the intel hd 4000 graphics which are capable of a max resolution of 2560 x 1600. Regardless of the available bandwidth it is unable to output 4k at 30hz but is able to do 1080 at 120hz. So this is more complicated. Obviously this isn't a problem with desktop graphics due to the way they work; having the display connectors on the card. But it is a thing and this isnt as simple as some of you think it is. 

Tl;DR it's not as simple as you think it is

thanks for explaining