2 graphic cards at 1 PCIe slot?

It's possible to connect 2 graphic cards with 1 PCIe slot (using an adapter?)?

Thanks.


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Alternatively, yes. But make sure you have deep pockets with plenty of $$$ in them.

A few moments with a search engine and the keywords "PCIe expander" turns up products like:

http://www.cyclone.com/products/expansion_systems/600-2707.php

GT(x) x9x usually have two GPU's for one PCIe Slot

GTX690 GTX590 GTX490(well almost:-) GTx295 etc...

Yes those cards have two GPUs but card either splits the x16 into x8 pairs or it multiplexes the x16, switching when required.

GT(x) x9x usually have two GPU's for one PCIe Slot

GTX690 GTX590 GTX490(well almost:-) GTx295 etc...

Yes those cards have two GPUs but card either splits the x16 into x8 pairs or it multiplexes the x16, switching when required.

Which is the same thing that would happen even if you did physically hook up two cards to one slot.

You might need to look for something such as this.
http://www.supermicro.com/a_images/products/Accessories/RSC-R2UT-2E8R.jpg
Depending on your needs a different riser might be what you need. Here is their full list.
http://www.supermicro.com/support/resources/riser/riser.aspx

There are several ways to do this. The main issue I would see is mounting the cards in the setup.


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My tip, is possible, but don´t try do that, is safer and cheap buy a better MB with more slots or build a second host.

Even the factory made double GPU´s have some limitations (i have few 590/690 so i know wath i´m talking) imagine a "band-aid" solution.

We do something similar by ussing a PCI-extensors in order to put more GPU´s on the same MB (but still 1 GPU per slot), works but in the end all goes to complicated and the entire system easely crashes, and when works all the PCI-e slots works extreamely slow, so the actual performance decrases exponentialy.
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There is also this adaptor
http://www.ebay.com/itm/PCI-32bits-to-PCI-E-express-16X-riser-card-adapter-/320693561785?pt=LH_DefaultDomain_0&hash=item4aaad369b9

Lets you connect a PCI-e card into an old PCI slot. It means the card only communicates at PCI speed, but for SETI work that's not a fatal problem. If I remember right another cruncher has tried them and found less than 10% performance loss.

Of course putting the lid back on the PC may be an issue, but shoe horning 2 cards into one slot is going to cause that sort of issue anyway.

Ian

There is also this adaptor
http://www.ebay.com/itm/PCI-32bits-to-PCI-E-express-16X-riser-card-adapter-/320693561785?pt=LH_DefaultDomain_0&hash=item4aaad369b9

Lets you connect a PCI-e card into an old PCI slot. It means the card only communicates at PCI speed, but for SETI work that's not a fatal problem. If I remember right another cruncher has tried them and found less than 10% performance loss.

Of course putting the lid back on the PC may be an issue, but shoe horning 2 cards into one slot is going to cause that sort of issue anyway.

Ian