Holy cow 16 per VEGA? I think I set like 40 at the moment for 2 but I'll check. Now I'm on trying to get the second one to work..
On a dedicated mining rig, that's easily done with a 128GB M.2 chip, like my favorite
<$60 ADATA.
It's only 118GB usable, but after Windows itself, and setting my VirtMem to 80GB (adding a 5th GPU this week), I still have 7 GB left. You'd have to be a little creative (stripping out Windows components) to get enough for 6, I suppose, but I'm sure it could be done. Of course, the 256GB is only $90 (and traditional SSDs are $80, but I really love the compact 'package' by using M.2).