Will PCIE 2.0 bottleneck?

[BlingKaChing]

Hello,
I'm planning on getting another hd7970Ghz ed. to run on crossfire, but im not sure if my pc will significantly bottleneck it(PCIE2.0) and if its worth getting? Iknow that one 7970 will show no difference at all compared to pcie3.0 but what about cfx?
my specs:
core i7 2600k @stock(turbo on)
8gb ddr3 1333mhz
intel p67
1x7970 Ghz ed

 

[corvetteguy1994]

Hello,
I'm planning on getting another hd7970Ghz ed. to run on crossfire, but im not sure if my pc will significantly bottleneck it(PCIE2.0) and if its worth getting? Iknow that one 7970 will show no difference at all compared to pcie3.0 but what about cfx?
my specs:
core i7 2600k @stock(turbo on)
8gb ddr3 1333mhz
intel p67
1x7970 Ghz ed

well if you CF then yes it will BN with 2.0. for best results upgrade to a high end ivy bridge(2nd gen cpus dont support pci-e 3.0) and get a z77 borad because when you crossfire with 2 pci-e 3.0 slots at x8 there at pci-e 2.0 x16 speeds.

 

[amuffin]

No.
It won't bottleneck AT ALL.

 

[amuffin]

well if you CF then yes it will BN with 2.0. for best results upgrade to a high end ivy bridge(2nd gen cpus dont support pci-e 3.0) and get a z77 borad because when you crossfire with 2 pci-e 3.0 slots at x8 there at pci-e 2.0 x16 speeds.

Seriously?

 

[dudewitbow]

2.0 will only bottleneck if its in a 4x lane. if its pci-e 3.0, it doesnt matter, as pci-e 3.0 x4 is the same as 2.0 x8 I think.

 

[Hazle]

considering a PCIe3.0 performs ~1-3% (and i'm being optimistic here) better than PCIe2.0 at best, i doubt the VERY MINOR, INSIGNIFICANT bottleneck running it in CF/SLI with PCIe2.0 vs PCIe3.0 is going to show a huge enough difference to render it a non-enjoyable experience.

stick with PCIe2.0

 

[majestic1805]

I have no direct experience with this but everything I've read has echoed what others besides corvetteguy has said with the caveat that the *current* PCI 3.0 cards utilize zero of the advancements 3.0 brings. That can (and probably will) change in the future. However, for now, 2.0 is very sufficient. That said, my new board (a 2.0 board) and GPU arrived (a 3.0 card) and I am anxious to get home to see how it performs.

 

[corvetteguy1994]

Seriously?

not trying to argue and corect me, but am i wrong? In a benchmark he would see better, maybe not significant but he would see better results with 3.0 crossfired then 2.0 crossfired.....with the right motherboard at least

 

[Limerick]

No it won't bottleneck, if you put it into a pci 3 x4 lane it WILL though. You'll need to put in a x8 lane.