Was the original RAID controller an LSI or Intel adapter?
You say: "Intel names the LSI card something different on the packaging". What do you mean by this? What is the name Intel uses on the packaging?
Why did you try 4 new adapters to resolve the issue? If the issue remained after one replacement, it would seem to be something other than the card.
Where is the "Event 11" message being reported?
If you are using an Intel controller, you shouldn't be using LSI drivers.