PIC lanes and risers

[kris44dad]

I just saw video of someone installing an eight USB riser in a single pci-e slot. What's the scoop on how many data paths (or whatever) can be supported by one pci-e slot? But, I'm sure some boards are better than others.

[EunSoo]

The lanes it supports is dependent on the size of a slot. A 16x slot can go up to 16 lanes but also supports 8x cards and smaller. An 8x slot can only support up to 8 lanes or lower and so forth. Though even if you have 4 16x slots, that doesn't mean you have 64 lanes at your disposal. Your CPU has a maximum PCIe lanes (eg. 8700k has 16 PCIe lanes).

 

I assume that you mean a 1x PCIe slot which gets one lane so even if you plug in an x16 card, it will only get one lane, not sixteen.

[Himommies]

Just out of curiosity what are you doing?

There's probaly a better option for what your doing if your concerned about Data transfer speeds and 8 USB's

[vanished]

Depends what revision.  USB 2 is 480 Mbit so even a 1x PCIe 3.0 slot could support ~16 devices at full capacity in theory.  If you move up to USB 3 (5 Gbit), just 2 ports will more than max out a single lane, and of course it only get s worse as you go up from there to 10, and 20 Gbit verisons.

 

Edit: just realized you're asking about 1 slot not 1 lane.  In that case, assuming you dedicate an entire 16x PCIe 3.0 slot to USB devices, you should be able to handle 6 20 Gbit USB ports in theory.

[kris44dad]

On 3/22/2018 at 4:52 PM, Himommies said:

Just out of curiosity what are you doing?

There's probaly a better option for what your doing if your concerned about Data transfer speeds and 8 USB's

I was curious from watching the video. I'm not doing all the mining nonsense.