NVMe Raid 0 vs. Radeon RX580 Crossfire cards

Hi! I have ASUS ROG Crosshair VII Hero (WiFi) motherboard. It has 2 M.2 NVMe slots. M.2_1 slot is PCIE X4 direct to the CPU and does not share any PCIE lanes with the PCIE slots. I have 2 RX580's in crossfire, each card runs at PCIE x8.

Now, the M.2_2 slot will steal 4 PCIE lanes from the PCIE_2 slot. So here is my question:

Which will give me better performance? A single NVMe drive in M.2_2 slot at PCIE x4, and two RX580's both at PCIE x8 OR 2 NVMe SSDs in RAID 0 both at PCIE x4 and then one RX580 GPU at PCIE x8 and one RX580 GPU at x4? I do play graphically intensive games such as Far Cry 5 and New Dawn, Train Simulator and Flight Simulator.

Thanks!
John

So, basically, stick with the single NVMe SSD.....

As the video stated 4k Random read write at QD1 is where most of the action happens in most windows environments. If not using the rig to move massive files around on a regular basis then raid is great to play around with but no real world benefit.

Plankton said:

I would do a single 1TB NVMe (the Gigabyte Aorus) and keep your CrossFire setup. Check the specs out on that beauty. Then add 2 - 4 SSD's on the SATA ports for storage.

I have the identical setup as @NavyLCDR (twin RX 580s and a M2.1 1 TB drive) I'm not going to bother using the M2.2 drive slot as it does steal from the graphics cards. I get better gaming performance out of crossfiring my cards than one card alone, but I'm not going to reduce one card to x4 just to have another M2 drive. One is fast enough, and I have no need to use RAID. I get all of the performance that I need from the single drive.

That's a long way of saying that I agree with Plankton. :)