Is it PCI 2.0 or 3.0?
1435409
Both, pcie 3.0 should be backward compatible with a pcie 2.0 slot, it was on my computer. You can check the Nvidia web site at nvidia.com and it should say pcie 3.0, however on the box it indicates that it is backward compatible with a pcie 2.0 slot.
1435410
it works in an PCI 3.0 slot but not on all motherboards! Works on ASUS and Supermicro but I cannot make it work on an Intel motherboard. If you need low profile, there are no many choices. The performance is above 6 of the windows index (of 7.9 max)
461282
PCIe 2.0 works just fine (I ran Crossfire with this and a Tri-X on an AMD system with PCIe 2.0).
310986
considering the pci 3.0 is backward compatible with the 2.0 specification there should be no problem, however, I have not tried this so it is a theoretical answer. I assume you have two 16 slots and the first is populated with another card. Also as mentioned in order to provide the best throughput you will need 4 lanes. Most motherboards provide 8 for the second 16 slot put it is worth a double check before you invest in the card.
880028
I can't believe the misinformation here. At out current time, only a top, top end GPU like the GTX 980 or 970 will make use of PCIe 3.0. Yes, 3.0 does double the speed of 2.0, but nothing actually makes it necessary that plugs into 3.0. At most, you might lose a frame or two per second in a game by running a 3.0 card in a 2.0 slot, if that. All of the available bandwidth in PCIe 2.0 has yet to be used. So, you will be just fine!
2036718
Yes. This card uses pci express 1.0, while that board supports pci express 2.0, but the newer standard is backwards compatible. This card will work just fine, though a card that supports pci express 2.0 may offer better performance.
39017
There's absolutely no performance decrease between PCIe's 2 and 3, so you're in luck! :)
1135291
its 2.0 but its not that much of a difference, yes it will support 3.0 gpus I have a gtx 770 in mine works great difference in performance of 3.0 and 2.0 is negligible at this point
846886
Asus lists it as PCI 3.0 Ready. http://www.asus.com/us/Motherboards/P9X79_WS/
1142092
Yes it will work. A few things to note though: That motherboard has only one PCI-e 2.0 x16 slot. Make sure you aren't using it for anything else first. Second, the card was designed for PCI-e 3.0. It will work with your 2.0, but you might not get full performance. Though I have heard people say that there isn't much of a difference since video cards aren't powerful enough yet that they truly need 3.0. Finally, don't forget to disable the on-board graphics on your motherboard after installing this one. I believe this is mentioned in the installation guide as well.
455441
No, just give it to me! Just kidding... it should work since it's pci-e 3.0
859192
PCI-E 3.0 is backwards compatible with past PCI incarnations. http://en.wikipedia.org/wiki/PCI_Express#PCI_Express_3.x
2007784
No, this mb does not have PCIE 3.0. Only the Gen 3 board does, but they are not produced any more. You don't even use that throughput on a video card anyways. UD3 and UD4 is a Gigabyte clarification. This mb uses TUF components that are military standard. It is a more reliable board than what Gigabyte makes, however, Gigabyte is a good brand.
1341367
PCIe 3.0 DOES have double the bandwidth of PCIe 2.0, but that doesn't matter, because there isno card yetthat is bottlenecked by sixteen lanes of PCIe 2.0. (i.e. a standard pcie 2.0 slot.)
1912154
all GPU cards are backwards compatible with PCI-E 2.0 and 3.0 so yes you can use a GPU 3.0 Card with that board.
1135293
If you want PCI Express 3.0, then shop for the Sabertooth 990FX/Gen3 R2.0: "3X PCIe 3.0/2.0 x 16 (dual x16 or x16/x8/x8)" listed in ASUS's Specifications under expansion slots
1327034
Yes. Even though this card is PCI-e 3.0 and the motherboard has PCI-e 2.0 slots, PCI-e 3.0 is backwards compatible with PCI-e 2.0. Just be sure to put the card in one of the two x16 slots, not one of the x4 slots. The manual should show which slots are which.
123928
Im not sure, but I think the optiplex has different style connections like a PCI2 but no regular PCI that I remember