High Pci-e lane processors

[YourAvgJoe]

Hello. I am working on finding parts for a new build and I've chosen dual Nvidia GeForce GTX 1080ti GPUs (SLI) as well as a Pci-e based capture card. I need a processor with enough Pci-e lanes to power that. It would be used for gaming, video encoding, and Ue4 (rendering, etc).

 

A usb-based capture card would also be acceptable if anyone has any suggestions

 

I looked at the i-7 7700k and it only had 20 pci-e lanes. Intel's website split it up into 1x16, 2x8, and 1x8 + 2x4. This would be ok if I did a usb-based capture card but would prefer pci-e

 

I would prefer an Intel solution but will go for AMD if required. I don't have a budget for this, but would like to avoid spending $1000 on a processor.

[zMeul]

go X99

some CPUs on that platform have 40 something PCIe lanes

[79wjd]

Does a capture card require lanes directly from a CPU, if it doesn't than you could run the GPUs off the CPU and the capture card off the chipset. 

[Billy_Mays]

35 minutes ago, YourAvgJoe said:

Hello. I am working on finding parts for a new build and I've chosen dual Nvidia GeForce GTX 1080ti GPUs (SLI) as well as a Pci-e based capture card. I need a processor with enough Pci-e lanes to power that. It would be used for gaming, video encoding, and Ue4 (rendering, etc).

 

A usb-based capture card would also be acceptable if anyone has any suggestions

 

I looked at the i-7 7700k and it only had 20 pci-e lanes. Intel's website split it up into 1x16, 2x8, and 1x8 + 2x4. This would be ok if I did a usb-based capture card but would prefer pci-e

 

I would prefer an Intel solution but will go for AMD if required. I don't have a budget for this, but would like to avoid spending $1000 on a processor.

Oh I was going to suggest a 6950x but your budget doesn't like that idea

[Vegetable]

x99 with a i7 6850k is the cheapest to do what u want

[79wjd]

10 minutes ago, Vegetable said:

x99 with a i7 6850k is the cheapest to do what u want

The 28 PCIE lanes of a 6800k would also be enough and you can even run a capture card off the PCIE lanes from the chipset, so even a 7700k would suffice.

[typographie]

52 minutes ago, YourAvgJoe said:

I looked at the i-7 7700k and it only had 20 pci-e lanes. Intel's website split it up into 1x16, 2x8, and 1x8 + 2x4. This would be ok if I did a usb-based capture card but would prefer pci-e

The i7-7700K has 16 PCIe lanes of its own. The Z270 chipset has its own set of 24 PCIe 3.0 lanes that are limited to 4x. The normal scenario would be that your two video cards eat up all 16 CPU lanes in 8x/8x mode, and you've still got the 24 chipset lanes for other types of peripheral devices that don't need more than 4x. I assume a capture card doesn't need more than 4x either, but I do not know much specifically about capture cards.

 

In theory it would be just fine on a 7700K/Z270 system, but if you want more cores for editing applications or something the 6800K is certainly a fine choice anyway.

[Vegetable]

1 minute ago, djdwosk97 said:

The 28 PCIE lanes of a 6800k would also be enough and you can even run a capture card off the PCIE lanes from the chipset, so even a 7700k would suffice.

yeah but he's implying that he wants pcie 16x on both 1080 ti's which is understandable. To spend that much money and risk it being bottlenecked because it's running at pcie 8x would suckkk

[79wjd]

Just now, Vegetable said:

yeah but he's implying that he wants pcie 16x on both 1080 ti's which is understandable. To spend that much money and risk it being bottlenecked because it's running at pcie 8x would suckkk

No it's not. Even 3.0x4 isn't going to be much of a bottleneck. 

[typographie]

2 minutes ago, Vegetable said:

To spend that much money and risk it being bottlenecked because it's running at pcie 8x would suckkk

I want to see some benchmarks of that actually happening to recommend someone buy a $600 CPU they don't otherwise need.

[Vegetable]

oops

[YourAvgJoe]

12 hours ago, typographie said:

I want to see some benchmarks of that actually happening to recommend someone buy a $600 CPU they don't otherwise need.

Found a benchmark for you

https://www.pugetsystems.com/labs/articles/Titan-X-Performance-PCI-E-3-0-x8-vs-x16-851/

[typographie]

2 minutes ago, YourAvgJoe said:

Found a benchmark for you

https://www.pugetsystems.com/labs/articles/Titan-X-Performance-PCI-E-3-0-x8-vs-x16-851/

I suppose that would be really worrying if you plan to run Unigine Heaven at 11520x2160 at medium settings a lot. That's an odd and really interesting result for sure, but it doesn't seem to be repeated anywhere in that article or elsewhere. All the tests that look anything like real-world 4K gaming still show single-digit differences at best, out of totals far beyond the refresh rate of any 4K monitor currently available.

 

It's your money and it doesn't matter if you convince me of anything. I'm just making sure you understand what the $200 extra for an i7-6850K is actually buying you.

[YourAvgJoe]

8 hours ago, typographie said:

I suppose that would be really worrying if you plan to run Unigine Heaven at 11520x2160 at medium settings a lot. That's an odd and really interesting result for sure, but it doesn't seem to be repeated anywhere in that article or elsewhere. All the tests that look anything like real-world 4K gaming still show single-digit differences at best, out of totals far beyond the refresh rate of any 4K monitor currently available.

 

It's your money and it doesn't matter if you convince me of anything. I'm just making sure you understand what the $200 extra for an i7-6850K is actually buying you.

Yeah, I don't plan on that.

 

Well, thanks for the insight. The extra $200 doesn't really add much and I think the 7700k is the way to go. The extra 24 pcie lanes in the z270 chipset will make up for the capture card.

[NumLock21]

Physical connector on capture card determines the number of pcie lanes it needs.

Pcie x1, then it uses 1 pcie lane