Probably have to go with universal blocks...not sure they make any full-covers for 550 Ti's...
Yup thought about that also, going to choose some universal ones then.
My problem with air cooling them is that I made a custom case, and I just made a test with tri sli 580 running inside the case with air cooling only and they were near 80ºC... a bit hot, and not even on load just plain running, my gpus are going to run cooler but I can´t risk damaging both the system nor the case (lots of work, dedication and money put on that case
About the rest of the parts are they ok? should I order them, or anything better for the same price?