2 r9 280x crossfire pci-e 8x

[Dutchraccoon]

Will running 2 r9 280x cards in crossfire both on pci-e 8x on the asus P8P67 deluxe cause bottlenecks?

 

[gwapito]

Very small to no difference at all comparing pciE 2.0 vs 3.0 and same with x16 vs x8. Check this out:

http://www.pugetsystems.com/labs/articles/Impact-of-PCI-E-Speed-on-Gaming-Performance-518/

 

[Epsilon_0EVP]

You're running a bit of an older motherboard, so you're actually going to run in PCIe 2.0 instead of 3.0. This might cause a bit of an issue, as it halves your bandwidth. Even then, most modern graphics cards are not bottlenecked by 4x PCIe 3.0 lanes, which is equivalent to your 8x PCIe 2.0 lanes, so you should be fine, but it's cutting it a little bit close.

 

[Dutchraccoon]

Very small to no difference at all comparing pciE 2.0 vs 3.0 and same with x16 vs x8. Check this out:

http://www.pugetsystems.com/labs/articles/Impact-of-PCI-E-Speed-on-Gaming-Performance-518/

Thnx for the info!

 

[gwapito]

Very small to no difference at all comparing pciE 2.0 vs 3.0 and same with x16 vs x8. Check this out:

http://www.pugetsystems.com/labs/articles/Impact-of-PCI-E-Speed-on-Gaming-Performance-518/

Thnx for the info!

no problem. Good luck crossfiring

 

[Dutchraccoon]

You're running a bit of an older motherboard, so you're actually going to run in PCIe 2.0 instead of 3.0. This might cause a bit of an issue, as it halves your bandwidth. Even then, most modern graphics cards are not bottlenecked by 4x PCIe 3.0 lanes, which is equivalent to your 8x PCIe 2.0 lanes, so you should be fine, but it's cutting it a little bit close.

yes i know it is a bit old but i'm buying it with a 2600k and 8gig of ram for around 300 bucks and the graphics cards for 280 buck so thats quite a good deal isn't it?
Thnx for the reply!

 

[Epsilon_0EVP]

You're running a bit of an older motherboard, so you're actually going to run in PCIe 2.0 instead of 3.0. This might cause a bit of an issue, as it halves your bandwidth. Even then, most modern graphics cards are not bottlenecked by 4x PCIe 3.0 lanes, which is equivalent to your 8x PCIe 2.0 lanes, so you should be fine, but it's cutting it a little bit close.

yes i know it is a bit old but i'm buying it with a 2600k and 8gig of ram for around 300 bucks and the graphics cards for 280 buck so thats quite a good deal isn't it?
Thnx for the reply!

That does sound like a pretty sweet deal. The 2600K is still a champ of a CPU. Good luck!

 

[Dutchraccoon]

You're running a bit of an older motherboard, so you're actually going to run in PCIe 2.0 instead of 3.0. This might cause a bit of an issue, as it halves your bandwidth. Even then, most modern graphics cards are not bottlenecked by 4x PCIe 3.0 lanes, which is equivalent to your 8x PCIe 2.0 lanes, so you should be fine, but it's cutting it a little bit close.

yes i know it is a bit old but i'm buying it with a 2600k and 8gig of ram for around 300 bucks and the graphics cards for 280 buck so thats quite a good deal isn't it?
Thnx for the reply!

That does sound like a pretty sweet deal. The 2600K is still a champ of a CPU. Good luck!

Tanks!