hdmi version

[TheBean]

i have an old dell laptop and i wanted to know which HDMI port version i have. I wanted to run a monitor because the screen is just SO bad.

 

my laptop is a inspiron 3421 which has a i5-3337u + gt730m

[Mira Yurizaki]

It's likely 1.4.

[TheBean]

can that push 1080p 144hz?

[Glenwing]

5 hours ago, saksham said:

can that push 1080p 144hz?

Yes, but the monitor needs to support 144 Hz over HDMI, which is unusual. Get the ViewSonic XG2401 or XG2402 if you plan on running a 144 Hz monitor over HDMI.

[Limecat86]

39 minutes ago, Glenwing said:

Yes, but the monitor needs to support 144 Hz over HDMI, which is unusual. Get the ViewSonic XG2401 or XG2402 if you plan on running a 144 Hz monitor over HDMI.

HDMI 1.4b and up (officially) support 1080p@120Hz. For 144Hz you would need a Dual Link DVI or DisplayPort.

[Glenwing]

35 minutes ago, Limecat86 said:

HDMI 1.4b and up (officially) support 1080p@120Hz. For 144Hz you would need a Dual Link DVI or DisplayPort.

Not true at all, 1080p 120 Hz has had "support" since HDMI 1.4. You can also run 144 Hz (or any refresh rate) as long as bandwidth allows for it, HDMI's "support" for various video formats has nothing to do with whether those formats can be run over HDMI or not, contrary to intuition. "Support" is not synonymous with "capability" in HDMI.

 

"Supported formats" are simply formats that have standardized timings defined, to ensure interoperability with common formats. For example if your device supports 1080p 60 Hz, then you must support 1080p 60 Hz using certain exact timings (defined in the specification) just to establish a baseline of what all devices must be capable of, for compatibility reasons. There's no requirement that only those pre-defined formats can be used, and there's nothing "unofficial" or "out of spec" about using formats outside that list. HDMI has "support" for the formats defined in the CTA-861 standards, which don't define any timings for 144 Hz formats. It also doesn't define any 2560×1440 formats, so that resolution isn't "supported" by HDMI either (i.e. it's not a "supported format") but that doesn't mean it doesn't work or it isn't allowed or something like that. Same with 144 Hz formats. They aren't a "supported format", but they're perfectly valid. 1080p 144 Hz is possible to implement as of HDMI 1.3 or later, which is when the bandwidth was increased to surpass Dual-Link DVI.

 

https://linustechtips.com/main/blogs/entry/1429-viewsonic-xg2401-144-hz-over-hdmi-testing/

https://linustechtips.com/main/topic/729232-guide-to-display-cables-adapters-v2/?section=hdmi_60hz_limit

[TheBean]

On 7/26/2018 at 1:47 AM, Glenwing said:

Yes, but the monitor needs to support 144 Hz over HDMI, which is unusual. Get the ViewSonic XG2401 or XG2402 if you plan on running a 144 Hz monitor over HDMI.

those are really expensive. other 144hz 1080p are about $200

[Glenwing]

12 minutes ago, saksham said:

those are really expensive. other 144hz 1080p are about $200

How about the AOC G2460PF? It can go up to 120 Hz over HDMI if you set a custom resolution.

[TheBean]

9 minutes ago, Glenwing said:

How about the AOC G2460PF? It can go up to 120 Hz over HDMI if you set a custom resolution.

ahh.. thats a good point. I forgot you could do custom resolution/refresh profiles.