I have a rig running this motherboard, this board has 6 PCIe slots ( 2 16x, 2 4x, 2 1x), I can get 5 cards to work on this board under Linux. The 6th card does not work at all, in Linux logs, I see things like "Card Fell off the bus". I know it is funny
. But basically it means that the BIOS see's 6th Card, but OS can't use it when it tries to load drivers. As soon as I take that card off, system boots up fine and I can mine on 5 cards.
Has anyone else see this problem before with this version of the motherboard (rev 4.0)?
In BIOS I have enabled IOMMU and disabled unwanted stuff like 1394 ports and audio controller. I have also already tried Presence Detection jumping of port. It works for now with 5 cards and is stable, but I am wasted 25MH not able to squeeze more out of this card. Any help is appreciated. Thank you.