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  #1  
Old 29-05-19, 05:56 PM
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PCI-SIG has finally launched the PCI Express 5.0 Standard

Double the bandwidth of PCI 4.0 with full backwards compatibility.



Read more about PCI-SIG releasing their PCIe 5.0 standard.

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Old 29-05-19, 06:22 PM
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Old 29-05-19, 06:29 PM
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Can basically run 4 2080tis off one x16 slot and still be like oh that's it?
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Old 29-05-19, 06:30 PM
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Originally Posted by NeverBackDown View Post
Can basically run 4 2080tis off one x16 slot and still be like oh that's it?
Now that is just ridicolously insane when you think about it...
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Old 31-05-19, 01:35 AM
HJ1mech HJ1mech is offline
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What would this mean for egpu setups? Would 5.0 basically erase the fps penalty you have because TB3 is only 4 lanes?
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Old 31-05-19, 02:08 AM
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Originally Posted by HJ1mech View Post
What would this mean for egpu setups? Would 5.0 basically erase the fps penalty you have because TB3 is only 4 lanes?
Using TB3 as an example, it would mean a 5.0 specification would provide the same bandwidth using only 1 lane instead of the current 4.

So if they used 2 lanes, it would be double the bandwidth, 3 lanes 3x the bandwidth, etc. Would it erase the penalty? 4.0 might be able to do that, the real issue then becomes latency which neither will solve. Though it isn't all that bad as it is.

I'd expect to see PCIe4.0 implementations first although it shouldn't be around all that long.
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Old 31-05-19, 08:19 AM
tgrech tgrech is offline
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The FPS penalty is not a result of the bandwidth limitations, its the overhead and latency of the Thunderbolt controller. If you ran a GPU from an x4 slot normally there would generally be no performance penalty at all(at least with with mid tier cards at 1080p on most games), but once you have to go via a TB controller you generally get a fairly persistent hit, so it's the controller really where the issue lies, but Intel have started to let people make their own now. Though having more bandwidth would help once you start to move up to higher resolutions as usual.

Personally run my eGPU off a PCIe2.0 x1 Expresscard line though and generally get less of a performance hit than I would using TB3(PCIe3 x4 so 8 times more bandwidth and less performance), but that's an RX460 at 1080p tops.
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Old 31-05-19, 02:41 PM
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I've seen conflicting data on the performance issue of lanes vs latency. It's probably a mix of everything.

PCI4.0 is supposed to reduce latency a little bit so if TB4 came out in theory it would inherently be better if only marginally
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Old 31-05-19, 02:45 PM
Bartacus Bartacus is offline
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Is it just me, or doesn't PCIE4 now feel like a 'stop gap' prior to PCIE5?
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Old 31-05-19, 02:46 PM
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Yeah that's basically what happened.
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