Re-assembled my 560 GTX for the 2nd time. (1st time with bracket and new Antec 620, 2nd time with replacement Antec 620)
I love this mod... but its such as PITA.
Here are some thoughts
A) Both of my Antec 620s make a constant ticking noise. Luckily the 2nd one was able to be remedied with the magnet trick. (Don't know if I want to deal with ANOTHER replacement... maybe in 6 months)
Also, since Antec leaves a significant amount of air in the loop (in comparison to Corsair), if you mount the pump vertically HIGHER than the radiator, you get a a constant gurgle. This sucks for a design. My H60 never had this issue.
B) IMO, the bracket NEEDs to come with a back plate to prevent PCB flexing.
C) I probably spent over 15 hours installing this mod due to all the installation complications. Uber big heatsink in the way, to changing air flow, to pick something that could go wrong...
However, NOW I can say my 560 GTX is clocked at 990mhz core and 2250 memory. Temps don't even break 45C. It idles around 31c. Love it.

