The AMD Drivers limit you to 8 cores, with means 4x 7990 tops.
In that 18 slot rig RJK was going to build, he was planning on using visualization to split up the 18 cards into virtual OSs, so the drivers would only handle ~6 at a time. That FASTRA2 computer uses Nvidia, which have different drivers.
You can look all you want, but you won't find anyone with more than 8 AMD GPU chips in one computer.
In that 18 slot rig RJK was going to build, he was planning on using visualization to split up the 18 cards into virtual OSs, so the drivers would only handle ~6 at a time. That FASTRA2 computer uses Nvidia, which have different drivers.
You can look all you want, but you won't find anyone with more than 8 AMD GPU chips in one computer.
virtualization not visualization
I said 'normally'. That means under 'normal' circumstances where official, unmodified drivers, OS kernels and BIOS are used.