[EthanV2]

I'm not as clued up as I used to be about this stuff, but wouldn't this have a pretty serious impact on the performance of the individual cards? Seems like splitting 4 16x cards off one 4x bus would limit the available bandwidth somewhat.

[minxomat]

OP here. I found exactly one person using it, with positive results: https://hashcat.net/forum/thread-2622.html

Though amfeltec is sadly a pretty unknown company. Probably best known for their "squid" PCIe "split" cards for multiple M.2 drives in one x16 slot. I've used one of them.

[mschuster91]

That depends if the workload is data-transfer-bound or computing-bound.

If the former, yes you will suffer a massive performance blow even with just one GPU - but if the latter, it's an easy way to upgrade your system.

[EthanV2]

I suppose if you're just working on a data set that's already stored in memory on the GPU(s) the initial work involved in getting that data to the card would be impacted but everything after that benefits from having an absurd amount of computing power

[rasz_pl]

This might be useful for password cracking on GPUs. I imagine there is negligent traffic on the bus in this scenario.