3 ms·

Not quite. Note that Thunderbolt 2 can do 2x20G/bits/ per second, vs PCI-E v3 at 32G/bytes/ per second (on a 16x slot). Refs: - http://www.engadget.com/2010/1

Not quite. Note that Thunderbolt 2 can do 2x20G/bits/ per second, vs PCI-E v3 at 32G/bytes/ per second (on a 16x slot). Refs: - http://www.engadget.com/2010/11/19/pci-express-makes-the-3-0-leap-doubles-bandwidth-over-pcie-2-0/ http://www.engadget.com/2010/11/19/pci-express-makes-the-3-0... - http://en.wikipedia.org/wiki/Pci_express http://en.wikipedia.org/wiki/Pci_express - http://www.zdnet.com/intel-unveils-thunderbolt-2-7000016595/ http://www.zdnet.com/intel-unveils-thunderbolt-2-7000016595/ - http://www.tomshardware.com/news/lucid-gpu-graphics-thunderbolt-external,17520.html http://www.tomshardware.com/news/lucid-gpu-graphics-thunderb... - http://www.tomshardware.com/reviews/pci-express-graphics-thunderbolt,3263-7.html http://www.tomshardware.com/reviews/pci-express-graphics-thu... TL;DR external video cards via Thunderbolt help but can't hang in terms of performance with real internal cards. (edited for formatting)

deleted 13y ago
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astrodust 13y ago
I did some more reading and it looks like Thunderbolt 2 is a lot like a single lane of PCI-e v4, slightly faster but similar. Hopefully Thunderbolt performance will continue to improve, though, and it can leverage all of the improvements to PCI-e. The fiber version of Thunderbolt/Light-Peak could probably fix a lot of these issues with copper signal limitations. At this point the electronics in the Thunderbolt cable are so expensive that switching to a more expensive cable with no electronics might be a net win.
stormbrew 13y ago
I was looking at that kind of thing as well and the only thing that's worth noting is that I think a lot of video cards currently actively used are only 16x so they can be run on older motherboards with pcie 1 or 2. It's not clear that thunderbolt 2 isn't enough bandwidth to effectively run a video card, though I think you'd probably run into problems daisy chaining video cards with video cards or trying to run two out of one enclosure.

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astrodust 13y ago

I did some more reading and it looks like Thunderbolt 2 is a lot like a single lane of PCI-e v4, slightly faster but similar. Hopefully Thunderbolt performance will continue to improve, though, and it can leverage all of the improvements to PCI-e. The fiber version of Thunderbolt/Light-Peak could probably fix a lot of these issues with copper signal limitations. At this point the electronics in the Thunderbolt cable are so expensive that switching to a more expensive cable with no electronics might be a net win.

stormbrew 13y ago

I was looking at that kind of thing as well and the only thing that's worth noting is that I think a lot of video cards currently actively used are only 16x so they can be run on older motherboards with pcie 1 or 2. It's not clear that thunderbolt 2 isn't enough bandwidth to effectively run a video card, though I think you'd probably run into problems daisy chaining video cards with video cards or trying to run two out of one enclosure.