PCi Express 2.0 video cards.

[s.s.mason]

Can a PCi express 2.0 video card work in a PCi Express x16 slot?  If so, is there a performance loss?

[reddevilggg]

Do you mean a x2 video card.

 If so, then it will only work at x2 and not x16.

[s.s.mason]

i mean will a PCI Express 2.0 x16 vid card work in a PCI Express x16 mobo slot.  i've heard some say yes at a loss of performance, and some say no it just wont work.  just wondering if anyone knew for sure

ex. looking to put a Nvidia GeForce GTX 280, into a PCI Express x16 mobo slot.

my mobo: ASUS P5N32-E SLI LGA 775 NVIDIA nForce 680i SLI ATX Intel Motherboard

thnx in advance for any help on this. 

[computeruler]

Depends if the motherboard pcie x16 slot is 2.0 or not.  pcie 1.1 I think is compatible with 2 I think.  Mabye its 1 thats compatible with 2. I dont remember

[chevronman]

2.0 is backwards compatible with 1.1.

[computeruler]

I knew it

[s.s.mason]

ok, so is a PCI express x16 slot (non-2.0), considered a 1.1?

[computeruler]

what is the motherboard? There is pcie 1 and 1.1. It could be both

[s.s.mason]

Here's what i'm using..
-ASUS P5N32-E SLI LGA 775 NVIDIA nForce 680i SLI ATX Intel Motherboard

This is copied from my mobo's specs page on Asus' website..
-2 x PCI Express x16 slot, support NVIDIA® SLI™ technology, at full x16, x16 speed (blue)

doesn't say 1.0 or 1.1, so i'm assuming its just 1.0.  just trying to see if i can get a Nvidia GTX 280 in this baby.

[computeruler]

I think that board has 1.1

[s.s.mason]

ok cool, anyway i can find out for sure?

[computeruler]

I know for shure. 

[s.s.mason]

ok great, thanks for the info!!  do you know if there is any performance loss if i use a 2.0 card in a 1.1 slot?

[computeruler]

ya there is 1.1 is a lot slower of a bus speed than 1.1 it goes like this exculding pcie x1
pcie2 > pcie  1.1 agp > pci