PCI Lanes Problem

CrossFire10100 · November 21, 2017

Hey guys I recently got 2 RX Vega 64 cards both are running in CrossFireX mode but someone told me that my M.2 drive would lower the PCIE speed of the second card to 4X since my i5 7600K only has 16 lanes so ideally the cards should run at 8x 8x but now someone told me this, and I quote

Quote

Intel 7th gen CPU's only come with 16 pcie lanes in total.

M.2 needs 4
So that's 12 left
You can't do 6x each as it has to be a power of 2
So 1 gpu will get x8 and the other x4

My current setup

Mobo: ASUS PRIME Z270-A

CPU: i5 7600K Overclocked to 4.7 Ghz

CPU COOLER: NOCTUA NH D15

RAM: 16GB Corsair LPX 2666

HardDrives:

SAMSUNG 960 EVO M.2 250GB NVMe PCI-Express 3.0 x4 Internal Solid State Drive (SSD)

1TB SEAGATE HDD

GPU: 2 x RX VEGA 64 Air Cooled

PSU: 1000W EVGA SuperNOVA 1000 G3

I dont think the case is relevant but is Fractal Design.

Please help me, the same guy that told me about the lanes, that I had no idea... told me to run the test on GPU-Z to check the speed of the speed and here is some screenshots, It says both are running at 16x which we know that is impossible..

I don't know what to do at this point. I tried changing M.2 to SATA MODE but it wasn't booting so I reversed that. I don't really care if I lose speed on the SSD but I don't want to loose speed on the GPUs