Thunderbolt Bandwidth Testing

This video tests the maximum advertised 40GBps bandwidth of Thunderbolt and finds real-world results of more like 30GBps.  While this will NOT matter in most cases, if true, this will prevent reviewers & video analysts from recording lossless 4K60 4:4:4 via Thunderbolt.  And it could also mean limitations for people using modern video cards externally.  If you’re a fellow nerd, join me to see if I’m onto something.  And if not, that’s fine too.  Here’s affiliate links to everything I used:

PC Build:

Motherboard #1:
Thunderbolt Card (only for 1st MB):
Motherboard #2:  or (only difference is color)
PCIe 4.0 NVME:
Sonnet Echo Express SE1 TB Enclosure:
StarTech.Com TB Enclosure:
Extra Thunderbolt Cable:

Capture Cards:

Live Gamer Bolt:
Live Gamer 4K:
Blackmagic UltraStudio 4K Mini:
Datapath VisionSC-DP2:
Datapath VisionSC-UHD2:


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