PCIe lane usage

[SlagZ]

So I'm running an I9-9900K with 16 lanes. My GPU is a 3080 that uses 16 lanes. I also have 2 NVMe drives in RAID 0 running at 4 lanes each. So shall I assume that the drives choking out the GPU for lanes?

[Electronics Wizardy]

Those nvme drives won't affect the gpu. There running off the chipset lanes, which is a seperate 4 lanes that gets broken up in the chipset to about 20 more pcie lanes.

 

Those nvme drives are shares 4 lanes to the cpu so you may hit performance limits there, but it won't matter in most real world uses where peak sequentica lspeeds aren't the issue.

[Godlygamer23]

What motherboard are you using?

[SlagZ]

thanks for the help

ROG Maximux X Z370. i did read somewhere the NVMe uses different lanes

[Godlygamer23]

9 hours ago, SlagZ said:

thanks for the help

ROG Maximux X Z370. i did read somewhere the NVMe uses different lanes

Looks like your configuration is unaffected by your motherboard. The two PCIe x16 slots with the metal bands around them are separate from the M.2 slots. Those slots though are tied to some SATA ports, and PCIe slots.