The AIO should be installed facing east.
The AIO should be installed facing east.
The key problem lies in how the radiator is set up. When the hoses are angled downward and below the pump, it pushes more air into the pump, cutting off its coolant supply. If you flip the hoses so they point upward above the pump, everything works fine.
I align the radiator with the tubes beginning at the top and extending downward to the CPU block.
I have mine off to the side. But as long as the tubes aren't being strained, that should be fine, and the radiator is installed above the pump/block.