The S5 RGB cases support the following radiator sizes:

• Top - Up to 360 mm (120 mm base)

• Rear - Up to 120 mm

Can I use a 280 mm radiator in the top of the S5?

We do not recommend using a 280 mm radiator in the S5 RGB cases, as this can cause clearance issues with motherboard VRMs, power connectors, and RAM slots.