CraptacularOne
GunslingerOCS
CraptacularOne
That's what I thought Gunslinger, its the lanes that's limiting you as it seems there isn't proper support for a 3 lanes with at least 8x going to all of them.
Out of curiosity are you running a PCI-E NVMe? You didn't specify whether or not when I mentioned it the first time. I'm asking again because the board may be pulling 4 lanes from one of your slots to feed the SSD. If so I'd suggest using a regular SATA SSD plugged into one of the SATA headers to test it and see if the lane allocation you need 8x8x8 appears in the bios.
No NVMe in the house, just plain old SSD's.
My next step would then be to get in touch with ASRock and see if they have perhaps a beta bios for you that will give you the proper PCI-E lane allocation to enable 3 way SLI. Maybe ask one of the admins on the ASRock forums?
https://www.google.com/ur...3zxG4HkU9rvE0vUrwAFwJP
One way I got extra lanes resources was to disable the M.2 Ports and the 2nd Network port.
One other item but I have to go into the Bios to get the info.
I got x8x8x16x8 on my X99 Rig.