Max number of GPUs per motherboard?

[feofhweufheuiwhfef]

The most PCIe slots I've seen on a motherboard is 6, for the asrock H61 and H81.

I've also heard that due to driver limits, there are only 6 allowed per motherboard.

So, I have 2 questions

1. Can you plug multiple risers into other ones..? E.g. a x1 riser with 3 x16s on the end, and then plug another x16 to x16 riser with multiple ones of those, to basically just endlessly expand the number of x16 slots?

2. Can you use virtualisation, such as VirtualBox, VMware, or Linux-KVM to get around the 6 GPU limit..? So, if it's a 6 GPU limit per 1 operating system, you just add more operating systems with virtualisation, and keep expaning endlessly?


Thanks

[chriswen]

I think that's a bad idea.

[miaviator]

It's like a phase that everyone goes through at some point.

[feofhweufheuiwhfef]

Any chance of a more detailed answer on this?

[Gator-hex]

11x GPUs is the definitive answer!

Rjk's Mining Rig Extraordinaire tested the limits (used the Trenton BPX6806 18-slot PCIe backplane) reached some kind of 11x GPU limit.

Full thread here: https://bitcointalk.org/index.php?topic=64450.0

Final image before he ran into some kind of 11x GPU card limit that stopped progress. A truly legendary GPU rig!

[Lyomon86]

I don't think that's a good idea.

[ModusPwnd]

I run 7 as the most on a mobo.  I use pci to pcie converters.

[andydabeast]

I run 7 as the most on a mobo.  I use pci to pcie converters.

aren't pci to pcie converters like $50 each? where do you get them?