Best I can get from PCIe 2.0
- Thread starter Sinji58
- Start date
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unknownofprob
Illustrious
- Oct 3, 2013
- 8,409
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- 38,960
if it is PCI-E 2.0 X16 or even X8, any card.
http://www.logicalincrements.com/articles/i7-3770k-vs-i7-3820/images/crysis_5760_1080.png
If the motherboard supports multiple-GPU support, from the names (Nvidia or AMD) in either dual/tri/quad configuration, it'll work. Not just any board with multiple slots will work in all configurations.
http://www.logicalincrements.com/articles/i7-3770k-vs-i7-3820/images/crysis_5760_1080.png
If the motherboard supports multiple-GPU support, from the names (Nvidia or AMD) in either dual/tri/quad configuration, it'll work. Not just any board with multiple slots will work in all configurations.
cub_fanatic
Honorable
- Nov 21, 2012
- 1,005
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- 11,960
Yes, basically any PCIe 3.0 x16 GPU will work because the PCIe interface is backwards compatible just like USB and SATA. If it fits in the slot, it works. As for multiple cards, it depends on if your motherboard supports SLI and/or Crossfire. Some boards support both, some only one and some neither despite having multiple PCIe x16 slots. Also, just because the specs say that a board has 2 or 3 PCIe 2.0 x16 slots, if they are using the native controller then you will be splitting the bandwidth in half with 2 cards; they will each be running in PCIe 2.0 "x8 x8". With 3 cards, it will typically run the card in slot #1 @ x8 and split the other two @ x4 x4. Some motherboards, though, have secondary controllers which allow you to run 3 or even 4 cards all @ x16 x16 x16. And sometimes, the board will have a slot that is the same size of a x16 slot but only actually runs @ x8 or x4 because it is either crippled or the rest of the pins are not physically connected. You can put PCIe x16 cards in these slots but they will never run @ x16 even if it is the only card on the board. Usually, these types of slots are 2nd or 3rd x16 slots further away from the CPU. You have to look at the specs of the motherboard on the manufacturer's website's product page to know how fast multiple cards will run and how many lanes each slot has normally. With PCIe 3.0, running 2 cards @ x8 x8 really doesn't affect the performance at all, it is something like a 2% or so loss. But, in PCIe 2.0, you will be getting a fairly significant loss of bandwidth when dropping to x8 and x4 which will be especially noticeable when using very high end, high powered cards like a GTX 770 and up or a R9 280 and up.
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