will i see fps loss with 6700k and dual 390x+m.2 due to pcie lanes

[Bajantechnician]

Due to the 6700k having less pcie lanes. Will I see a performance drop with I cfx two or 3 r9 390x cards? I will also be using. M.2 drive. 

 

Thanks

[wolfsbane3083]

Nope  You have 20 lanes to that's 2 8x for the GPUs and a 4x for the M.2 drive.  If you went with 3 cards you'll be running 4x on the GPUs, which should still have plenty enough bandwidth.

[TidaLWaveZ]

6 minutes ago, Bajantechnician said:

Due to the 6700k having less pcie lanes. Will I see a performance drop with I cfx two or 3 r9 390x cards? I will also be using. M.2 drive. 

 

Thanks

 

If I'm not mistaken I believe there's a very miniscule performance difference between GPU's running at 8x vs 16x. Will you actually see it, I don't think so.

[Bajantechnician]

3 minutes ago, TidaLWaveZ said:

 

If I'm not mistaken I believe there's a very miniscule performance difference between GPU's running at 8x vs 16x. Will you actually see it, I don't think so.

how about 4x

9 minutes ago, wolfsbane3083 said:

Nope  You have 20 lanes to that's 2 8x for the GPUs and a 4x for the M.2 drive.  If you went with 3 cards you'll be running 4x on the GPUs, which should still have plenty enough bandwidth.

4x?

I thought Gpus needed 8x min

[wolfsbane3083]

1 minute ago, Bajantechnician said:

how about 4x

4x?

I thought Gpus needed 8x min

Nvidia SLI requires 8x but AMD Xfire should be fine with 4x. PCI-e 3.0 4x has around 31Gbps bandwidth so there shouldn't be too much performance loss.

[Bajantechnician]

Just now, wolfsbane3083 said:

Nvidia SLI requires 8x but AMD Xfire should be fine with 4x. PCI-e 3.0 4x has around 31Gbps bandwidth so there shouldn't be too much performance loss.

so 2 way 390x is ok, but if i use 3 way, will i see the same framerate because if the bandwidth?

[sushisharkjl]

4 minutes ago, Bajantechnician said:

how about 4x

4x?

I thought Gpus needed 8x min

In terms of real-life perceived performance, there is a negligible difference between Gen 3 4x, 8x, and 16x

[Bajantechnician]

Just now, sushisharkjl said:

In terms of real-life perceived performance, there is a negligible difference between Gen 3 4x, 8x, and 16x

so 3 ways cfx on a 6700k would have better fps than 2 way cfx, even though its running at lower bandwidth?

[sushisharkjl]

Just now, Bajantechnician said:

so 2 way 390x is ok, but if i use 3 way, will i see the same framerate because if the bandwidth?

Negligible difference. Your card will not come close to using the 7.877 GB/s bandwidth.

[sushisharkjl]

Just now, Bajantechnician said:

so 3 ways cfx on a 6700k would have better fps than 2 way cfx, even though its running at lower bandwidth?

Yesh.

[Bajantechnician]

Just now, sushisharkjl said:

Negligible difference. Your card will not come close to using the 7.877 GB/s bandwidth.

so there will be sufficient fps gain thats not bottlenecked by the pcie?

[sushisharkjl]

Just now, Bajantechnician said:

so there will be sufficient fps gain thats not bottlenecked by the pcie?

PCIe is not going to be a bottleneck.

[Bajantechnician]

Just now, sushisharkjl said:

PCIe is not going to be a bottleneck.

I see.

 

Thanks