I've ordered a similar kit after seeing your set up. Was wondering if the fan pushes air down or up? (does it matter?)
What do your internal temps look like on the thermal controller?
So the fan draws air up through the radiator... then up through the front at the top of the ALX case.
Can get pretty warm in the case so I usually turn up the PCI and HDD fans up to around 70% in Command Centre - can get a bit loud, but you will never have to worry about temperature of your 690 even with o/c settings.
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Temps on the GTX 690 with a o/c are around 45-50 deg C