PCIE v4 and riser cables

[Quartz]

A number of cases like the Dan A4 depend upon riser cables to connect the motherboard to the GPU. Will these cables still give full bandwidth with PCIE v4? Will new cables be necessary? Or will cables not be possible?

 

[Quartz]

Educated guess but a cable is just wiring. As long as they don't fiddle with the connections, which they wont for backwards compatability, cable should not matter. Are riser cables rated as pcie 3 currently?

Yes, and I remember there being issues with those to start with.

 

[Quartz]

However if you are using the PCIe slot for a GPU then the extra bandwidth of 4.0 won't benefit you anyway.

That may be true for this generation of GPUs but what about the next one? And the one after that?

 

[Quartz]

I've not seen anyone say pcie 3.0 16x is fully utilised yet with todays GPU.

It isn't, but 8x is.

 

[Quartz]

I predict that by that point the AM4 platform will be outdated and it won't matter that you don't have 4.0 bandwidth.

But it will that you've exceeded 3.0 bandwidth. Two GPUs - or one GPU and a SSD array - will already soak a 16x 3.0 bus.