All three racks are maxed out on power, so there is no need to squeeze more hardware into each rack. Each rack can only power ~24 over clocked S1s. Also, I would need more shelves to put them in the racks three wide (I can fit 6 on one shelf the way they are organized now).

I acquired the hardware at different times, which explains why the racks contain a mixture of hardware in different positions.

If I was re-organizing all three racks from scratch, I would put the hardware in them differently, but I can't justify the downtime to re-organize given that everything is running well at the moment. I also need to be very careful where I plug things in so I don't overload a single PDU or outlet.