PCI 2 x16 turns into x4?

[Kingping987]

When I put my second graphics card on my Asus B85m-e/CSM board, AMD crimson says it is running on a x4 slot but on the website the motherboard is x16. SOMEONE PLS HELP!

[itsmyjobtoknow]

When I put my second graphics card on my Asus B85m-e/CSM board, AMD crimson says it is running on a x4 slot but on the website the motherboard is x16. SOMEONE PLS HELP!

 

Just because the physical size of it is 16x doesn't mean it is wired for 16x operation 

[thekeemo]

 

 

1 x PCIe 3.0/2.0 x16 

1 x PCIe 2.0 x16 (x4 mode) 

1 x PCIe 2.0 x1 

1 x PCI

[Glenwing]

When I put my second graphics card on my Asus B85m-e/CSM board, AMD crimson says it is running on a x4 slot but on the website the motherboard is x16. SOMEONE PLS HELP!

 

It's not an x16 slot, it's an x4 slot. It just has an x16-sized plastic socket attached to it.

 

https://www.asus.com/Motherboards/B85ME/specifications/

[Godlygamer23]

That's because it's wired for PCIe x4.

[Kingping987]

It's not an x16 slot, it's an x4 slot. It just has an x16-sized plastic socket attached to it.

https://www.asus.com/Motherboards/B85ME/specifications/

Thank you very much

[Kingping987]

Do you know how much of a performance hit 2 r9 270x in crossfire will deduct? Or the results of it?

Plus having a second gpu won't allow running both cards at x16, it will always drop down to x8 and x8 at most. In OP's case it is x4 since the second slot is only wired for x4, so it drops down the slower of the two overall.