(01-20-2016, 07:04 PM)epixoip Wrote: They're really expensive and have high latency. The 16-GPU expanders sell for $45k+.
epixoip: srsly? a standard expansion chassis itself should not cost much more than $2000-$2500. i did purchase different magma expansion boxes (i think it was 13-slot and 7-slot) some years ago, but for audio production and the standard was pci-x back then. AFAIK there is nothing GPU-specific about the boxes, it's generic PCIe expansion and the drivers have to be verified working with the expansion. - Are you specifically refering to this box: http://magma.com/products/pcie-expansion...-16-smart/ ? if they want 45 grand, i can only say LOL. i expected this box to be around $2000-$3000 from my experience.
If it's true what you are saying it would be cheaper to go and look for advantech stuff, chose a nice backplane e.g. this one http://buy.advantech.eu/PCE-7B17-00A1E-P...-00A1E.htm together with a single-board-computer. - However i'm afraid the price will be similar to the TYAN box for this one ... ;-)
My plan B is to use an empty 15-slot 4u rack chassis (i got two very cheap, standard price is around $200 per chassis, see http://www.orbitmicro.com/global/ghi-4f1...se#options), build in a standard mainboard and -if required- use pcie riser cables to connect the cards. But this is not my preferred solution, just plan B.
Plan C was to try and see if the EXSYS expansion boxes are working. They are offering extremely affordable pci(e) expansion solutions. Ok just checked, seems like they're only offering boxes for 2xPCIe + 2xPCI in the 4-slot config unfortunately, so it won't make sense: https://www.exsys.ch/en/expansion-box.html
also just found these: http://www.bhphotovideo.com/c/search?atc...4244844123
and this: http://www.delock.com/produkte/G_61950/m...anguage=en