Is crossfire possible with a 1 16x pcie and a 1 4x pcie slot?

[Mavhunter405]

I have a Gigabyte micro atx mobo, and it says is crossfire compatible but both pcie slots are different. One at 16x and the other at 4x. Will I benefit from crossfire? I´ll link the mobo specs down below.

http://www.gigabyte.us/products/product-page.aspx?pid=5541#sp

 

[Multipack]

It supports Crossfire yes. Depends which cards you have,.

 

[clarkjd]

Support Crossfire? yes
Perform well in crossfire mode? not so much.
Assuming that your cards will crossfire, I doubt that you will see gains equal to the cost of the second card.

 

[Ricky Omesmo]

I have a Gigabyte micro atx mobo, and it says is crossfire compatible but both pcie slots are different. One at 16x and the other at 4x. Will I benefit from crossfire? I´ll link the mobo specs down below.

http://www.gigabyte.us/products/product-page.aspx?pid=5541#sp

Even on a gtx1080 there is little difference between x16 and x4.
You can see some reviews about that.
https://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_1080_PCI_Express_Scaling/24.html
https://www.techpowerup.com/reviews/NVIDIA/GTX_980_PCI-Express_Scaling/21.html
https://www.techpowerup.com/reviews/AMD/R9_Fury_X_PCI-Express_Scaling/18.html
https://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/23.html

 

[Multipack]

Chipset version will have an impact on performance, but theoretically yes a PCIE x16 slot running at x4 can still be used.

 

[rgd1101]

AMD's crossfire only required min of x4. Nvidia's SLI require min of x8

 

[Mavhunter405]

It supports Crossfire yes. Depends which cards you have,.

I´ve got an Asus Dual RX 480 4gb. I plan on upgrading in the future for a crossfire setup but dont know if my mobo will keep up.

 

[Mavhunter405]

Support Crossfire? yes
Perform well in crossfire mode? not so much.
Assuming that your cards will crossfire, I doubt that you will see gains equal to the cost of the second card.

Can you suggest any motherboard capable of crossfire 2 rx 480?

 

[clarkjd]

Support Crossfire? yes
Perform well in crossfire mode? not so much.
Assuming that your cards will crossfire, I doubt that you will see gains equal to the cost of the second card.

Can you suggest any motherboard capable of crossfire 2 rx 480?

Specifically, no. I'm not that into crossfire or SLI. I would want a board that had at least 2 x8 pci-e slots(or an x16/x8 board).

 

[Mavhunter405]

I have a Gigabyte micro atx mobo, and it says is crossfire compatible but both pcie slots are different. One at 16x and the other at 4x. Will I benefit from crossfire? I´ll link the mobo specs down below.

http://www.gigabyte.us/products/product-page.aspx?pid=5541#sp

Even on a gtx1080 there is little difference between x16 and x4.
You can see some reviews about that.
https://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_1080_PCI_Express_Scaling/24.html
https://www.techpowerup.com/reviews/NVIDIA/GTX_980_PCI-Express_Scaling/21.html
https://www.techpowerup.com/reviews/AMD/R9_Fury_X_PCI-Express_Scaling/18.html
https://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/23.html

I find it interesting that there´s only a 3% loss with the Fury X, at 4x 3.0 and somewhat similar with the nVidia cards.
For what the graphs are showing, im assuming there still can be a significant boost in performance with that type of pcie slot?

 

[Mavhunter405]

Support Crossfire? yes
Perform well in crossfire mode? not so much.
Assuming that your cards will crossfire, I doubt that you will see gains equal to the cost of the second card.

Can you suggest any motherboard capable of crossfire 2 rx 480?

Specifically, no. I'm not that into crossfire or SLI. I would want a board that had at least 2 x8 pci-e slots(or an x16/x8 board).

Ok, thanks, I´ll have a look to see what I can find

 

[Multipack]

The second slot is PCIE 3.0 x4, so the same as PCIE 2.0 x8 which is *probably* enough for two 480's. What model are they?

 

[chenw]

I have a Gigabyte micro atx mobo, and it says is crossfire compatible but both pcie slots are different. One at 16x and the other at 4x. Will I benefit from crossfire? I´ll link the mobo specs down below.

http://www.gigabyte.us/products/product-page.aspx?pid=5541#sp

Even on a gtx1080 there is little difference between x16 and x4.
You can see some reviews about that.
https://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_1080_PCI_Express_Scaling/24.html
https://www.techpowerup.com/reviews/NVIDIA/GTX_980_PCI-Express_Scaling/21.html
https://www.techpowerup.com/reviews/AMD/R9_Fury_X_PCI-Express_Scaling/18.html
https://www.techpowerup.com/reviews/Intel/Ivy_Bridge_PCI-Express_Scaling/23.html

Those are only in single GPU configurations, and none of them explore the effect of lanes when in a multi-GPU configuration, which SLI is also in general less susceptible to due to the higher lanes bandwidth and the extra SLI link, while Crossfire is done entirely across the PCI-E lanes, which x4 could adversely affect the performance as it is used more.

 

[Multipack]

Yes chipset pcie bandwidth could be affected more than with SLI like you say, but it'd probably not be that noticeable. Is hard to say until trying really. I do agree it'd be better to use a x8/x8 config though to avoid those issues.