this post was submitted on 12 Sep 2023
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207
Intel makes Thunderbolt 5 official, promising speeds of up to 120Gbps (www.theverge.com)
submitted 11 months ago by [email protected] to c/[email protected]
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[–] [email protected] 6 points 11 months ago (3 children)

How many 4ks at 120hz can it run? Asking for a friend

[–] [email protected] 10 points 11 months ago

It should support at least 3. In case you’re seriously asking, TB3 is 40GBps and supports 1 display at 4k@120 with DP 1.4.

[–] [email protected] 5 points 11 months ago* (last edited 11 months ago) (2 children)

4K UHD needs a bandwidth of at least 10.2 Gbps, so this could drive eleven 4K displays

[–] [email protected] 2 points 11 months ago* (last edited 11 months ago)

It can be much higher - depends on how much color information you’re sending, and what the refresh rate is.

The DisplayPort spec (which alt mode runs across usbc) covers the streams:

https://en.wikipedia.org/wiki/DisplayPort

[–] [email protected] 1 points 11 months ago (1 children)

/drools

[–] [email protected] 8 points 11 months ago (1 children)

So some number from 3 to 11 apparently.

[–] [email protected] 5 points 11 months ago

120hz vs 60hz is twice the bandwidth, so more like 3-6. Though iirc (and that's a big if since I'm not going to look it up right now), there's a touch of overhead and maybe some reserved bandwidth in the full DP signal, so I'd bet more towards 3. More with compression, but it's not magic.

[–] [email protected] 2 points 11 months ago* (last edited 11 months ago)

3x 4K at 144hz, it’s right in the graphic in the article.