Question Arctic liquid freezer ii 280 compatibility

[Arabinda0007]

System Specs
R7 3700X
B550 Tomahawk
Cooler Master H500 Chassis

I want install Arctic liquid freezer ii 280 at the TOP of the Cases, But Case Specification says it only Support only 240MM radiator at the TOP.
When i ask a online retailer they said it can fitted at TOP.
Any one have such experience of Installing any 280MM radiator at the TOP CM H500 Chassis. I don;t want to install at the Front of Chassis.

 

[Crosslhs82x2]

I would believe CM before a retailer.
So a 280mm will only work in the front.

MasterCase H500 | Cooler Master

www.coolermaster.com