I cant find the max current , even on the data sheet. But they should be similar to normal boards.
I would be using 4 per tent . Just use a 320w driver in the 3x3 and probably 2x xlg-240 drivers in the 4x4, one per two boards.
Unless you want more light then either a single xlg150 per board or hlg320 per two boards.
If you have 8 boards is there a reason your trying to only use 3 of them ?
You could get away with two boards in the 3x3. I would prefer 4 boards so I could be closer and run softer for higher efficiency and have more even spread.