Koolance are quotes as saying for 700w heat removal:
Relative performance graph is based on total wattage dissipation potential while maintaining a heat load at 55?C (131?F) with ambient of 25?C (77?F) and fans at 100% power. Actual system performance may vary.
100% fan speed on a EXOS 2 is not desireable for any length of time, but shows it's possible.
Noise level on Exos 2 is not much more than (or equal to) an air cooled case at fan level 7 so realistically the max heat removal is 70% of 700w = 490w.
Mav