How many PCIe Extensions is TOO MANY??

Linus Tech Tips · 2.8M views · 2017-08-31 · 9:41

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Overview

Linus Tech Tips tests whether chaining many PCIe riser extensions causes loss of GPU performance. They keep adding extensions to see how far the signal will go.

On Hacker News

HN cites it as empirical evidence that PCIe cables can be chained to roughly three meters before failing.

Recommended by 1 HN people across 1 months · HN mentions 2017–2026

Topics

Computer architecture & CPUs Electronics & circuit design Consumer devices & gadgets

What people said

Uehreka · 2020-12 · Recommendation
I love a good “PCI Challenge”, where someone tries to see how much functionality they can wring out of PCI devices in a weird situation. Linus Tech Tips has a bunch of good ones: - How crazy of a device can you use with a server motherboard’s PCI hot-swap BIOS feature: [LINK] - How many PCI extenders can you use with a high end graphics card: [VIDEO]
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userbinator · 2026-08 · Reference
PCIe is more like a packet-switched network than a bus, which is incidentally why things like Thunderbolt (effectively external PCIe) and sillier demonstrations like [VIDEO] work. ...and with things like [LINK] , you can get even higher latencies.
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ChoGGi · 2024-06 · Reference
Someone needs to get this man a speed square, also a longer riser cable [1]. [1]I don't care much for Linus Tech, but [VIDEO]
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Sources

Video by Linus Tech Tips, played through YouTube.

HN Library · Source license

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