i have said this for years but was told "don't be stupid"
Because cards bend, bigger gpu's or ones with a heavy heatsink have been bending for donkeys years, it doesn't harm them, nor have I EVER seen anyone complain of a broken card from being slightly bent, nor have I ever heard of someone whose pci-e/agp slot finally gave way due to the weight, etc, etc, etc.
It's not made of 48 layers of reinforced steel, cards bend, motherboards bend, soundcounds bend, they are designed to not break instantly with a little bend in them. it just doesn't matter. If you're concerned, support the weight of the card by propping up the "sagging" corner of the card.
Anyway the Asus CU isn't a great design and never has been, the shroud should ONLY go from the fans to the heatsink not around the heatsink, it actually blocks off a large portion of the air's escape path from the heatsink, which will actually slow down the airflow and decrease cooling efficiency. I've had an Asus CU card before, temps were better, but no where near the temps you can get on a Prolimatech/Thermalright type heatsink, which while both are bigger, both are designed to fit more cards and aren't nearly as "tight" to the pcb as a heatsink designed purely for one card could be.
Few if any of the AIB's custom coolers are anywhere near as good as they should be.