What are typical use cases for needing 25Gbps?

Author talks about 4k video, but AI tells me that for "4K production mastering (ProRes 422 HQ, 4:2:2, 10-bit)" the rate is under 2Gbps.

I'm not saying it's not needed, - just curious.

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andy99 40 minutes ago | parent | next [-]

Running local LLMs split across machines. Pretty sure the author has some other posts about doing that.

Edit: https://www.jeffgeerling.com/blog/2025/15-tb-vram-on-mac-stu...

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kllrnohj 12 minutes ago | parent | prev | next [-]

> Author talks about 4k video, but AI tells me that for "4K production mastering (ProRes 422 HQ, 4:2:2, 10-bit)" the rate is under 2Gbps.

That'd be the rate for 1 stream at 1x playback. Multiple streams because of overlays/crossfades/etc... along with playback at >1x (such as during rendering in particular) will change that significantly.

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gregsadetsky 27 minutes ago | parent | prev | next [-]

We refurbish laptops and hence distribute .iso / ipsw images to various refurbishing stations. (or also, think of PXE/network boot situations). More images x more laptops refurbished at once = more bandwidth.

Obviously it's possible to move this to a NAS, not use a mac, etc. etc. - but just wanted to chime in with my little use case of moving multi-gig-files around. :-)

I was just looking for a thunderbolt-sfp solution. Super timely!

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QuantumNomad_ an hour ago | parent | prev | next [-]

What if it’s uncompressed footage at 60fps? And dealing with many shots. And on top of that maybe working with multiple projects in parallel.

	▲	geerlingguy 27 minutes ago \| parent [-]
		Normal 4K editing workflows are fine with even 2.5 Gbps wired networking (wired to make latency like when scrubbing not-horrid)... 10 Gbps more necessary if editing ProRes RAW and doing multicam (4-8 streams simultaneously). I'm in a never-ending pursuit of cutting time when transferring large files though — AI models is one thing, but I have 100-200 GB projects I transfer across for backup or import (using an external TB5 drive capable of 3-5 GB/sec), and if I can do that in 1 or 2 minutes per project instead of 3 or 4, that's a noticeable speedup. Definitely overkill for 98% of my workflow though. 10 Gbps is fine.

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colechristensen 17 minutes ago | parent | prev [-]

If you're editing video you're not just streaming in real time one copy. You have many streams that you're going to want to work around quickly.