PCI Lanes [Sorted]

[Tubsi]

I'm building a pretty overkill computer and I'm not quite sure how the PCI lane limitations on a CPU work. If I had two graphics cards (Two 1080s for example) that were 8x, would I also be able to have a M.2 SSD if my CPU says it has "16 PCI lanes"

[Oshino Shinobu]

CPU PCIe lanes (at least, on the Intel side of things) are almost exclusively reserved for graphics cards. PCIe based storage, such as an NVMe M.2 SSD will use PCIe lanes provided by the chipset, having no affect on the GPUs. 

[LienusLateTips]

No because NVIDIA says minimum 8 lanes per card when SLI (i think)

EDIT: forgot about chipset lanes

[Mira Yurizaki]

4 minutes ago, Tubsi said:

I'm building a pretty overkill computer and I'm not quite sure how the PCI lane limitations on a CPU work. If I had two graphics cards (Two 1080s for example) that were 8x, would I also be able to have a M.2 SSD if my CPU says it has "16 PCI lanes"

NVMe M.2 SSDs will route to the chipset except for HEDT boards where there's more than enough PCIe lanes to go around anyway.

 

Shameless plug:

 

[Tubsi]

3 minutes ago, Oshino Shinobu said:

CPU PCIe lanes (at least, on the Intel side of things) are almost exclusively reserved for graphics cards. PCIe based storage, such as an NVMe M.2 SSD will use PCIe lanes provided by the chipset, having no affect on the GPUs. 

 

1 minute ago, M.Yurizaki said:

NVMe M.2 SSDs will route to the chipset except for HEDT boards where there's more than enough PCIe lanes to go around anyway.

 

Shameless plug:

 

Thankyou very much for clearing this up, I've been trying to figure this out for ages.