This is a really
unprofessional and
expensive setup.
Its obvious that cards can't cool adequately, not enough space between them and why are they so high above the MB?
And why use
2 PSUs, when u can use 1 only if you had the soldering skills,
one PSU is much more efficient, we are talking 100-200 wats.
Its not a bad rig, but it hasn't been though thru enough, and quite a lazy setup.
P.S. Its also obvious, that if someone tries to pick it up from the sides, and squeezes, they might break off, cause they are attached only at the bottom...

You are definitely not a mechanical engineer???

why is a single psu ~10% more efficient? If anything, loading a PSU near capacity reduces its efficiency, and PSUs in the 1200W+ range go for a significant premium over those in the 750-1000W range. (you can get a pair of 850W GOLD power supplies for about the cost of a 1300W GOLD, and get an extra ~300W of usable power)
heck, for the price of 1600W psus, you can get a trio of gold-rated 650-850W power supplies and have 30-50% more power available. Of course, it makes for a larger messier rig - but that doesnt matter for some people who have the space or a reduced budget