SLI Issues ROG STRIX X570-E Gaming Wifi II & NVME

[hogansxd21]

Hi

I am having issues getting my two EVGA Nvidia GeForce GTX 1080 Ti FTW3 to work in SLI on my ASUS ROG STRIX X570-E Gaming Wifi II motherboard.

My boot drive is a Crucial M.2 NVME drive in the M.2_1 slot.

The GPUs are in slots PCIEX16_1 & PCIEX16_2 and are using a hard Nvidia SLI connector. I know the SLI connector works as I used it on my last build (was working last week).

The issue I am having is that I am unable to SLI the two cards, there is no option in the Nvidia control panel. I am thinking this is because one of the GPUs is having to share minecraft PCIE channels with the NVME boot drive.

GUPz shows PCIe x16 3.0 @ x8 3.0 in the Bus interface field when 1 card is installed, the same info for card 1 when the second card is installed but with PCIe x16 3.0 @ x4 1.1 showing for the second card...

Is there some way I can continue to use the M.2 as my OS drive and get my GPUs to SLI? Is there a setting in the BIOS I can change to allow both cards to run at x16 3.0 or even x8 3.0?

Thanks in advance for any advice!

System Specification:

Mobo: ROG STRIX X570-E Gaming Wifi II (BIOS 4204)

CPU: AMD Ryzen 7 5800X

RAM: G.Skill Trident Z F4-3600C16D-16GTZR

GFX: 2x EVGA Nvidia GeForce GTX 1080 Ti FTW3

NVME/Boot Drive: Crucial 500GB M.2 NVME CT500P5PSSD8

Data Drive(s): 4x Crucial 250BG SSD Raid 10

Edited July 22, 2022 by hogansxd21

[RitualBlack]

Try set your pcie lanes to run at x8 in the bios, especially being gen 4 you will not saturate them. I have an issue with my mobo being as old as it is that even with 40 pcie (gen 3) lanes I cannot use the 3rd pcie slot and an m.2 at the same time though I would assume motherboard manufacturers have worked out pcie lane distribution by now. Once you set them to x8 in the bios you should be able to allocate the last 4 lanes to the m.2 drive I would imagine!