Quick Answer

Mount the 360mm radiator in the front or top case position, seat the pump head on the CPU with pre-applied thermal paste, connect the pump to the CPU_FAN header and the radiator fans to CHA_FAN headers or a hub, then configure a custom pump and fan curve in the UEFI before first boot.

Choosing the Radiator Mounting Position 💧

Front-mounted radiators pull fresh outside air through their fins before it enters the chassis, giving the radiator the coldest possible inlet air. Front mounting is the better thermal choice for high-TDP CPUs like the Ryzen 9 9950X. The trade-off is reduced GPU clearance: the radiator plus fans add 90 to 120mm of front depth. Confirm your GPU fits in the remaining space before committing to front-mount.

Top-mounted radiators exhaust warm case air out through the top panel. This is the most common configuration because it does not affect GPU clearance. The trade-off is that the radiator sees pre-warmed case air, raising inlet temperature by 3 to 8 degrees compared to front mounting. For most Ryzen 7 9700X gaming builds, top mounting is the simpler and sufficiently capable choice.

Step-by-Step AIO Installation Process 🔧

Secure the radiator to the case panel before installing the pump head on the CPU. This sequence prevents hose tension from shifting the pump head positioning. Mount the three radiator fans to the radiator with the provided M3 screws, then attach the radiator-fan assembly to the case mount points.

Apply the backplate to the rear of the motherboard. For AMD AM5 boards, remove the stock plastic backplate and install the AIO's steel backplate for a more secure mount. Apply the pump head with pre-applied thermal paste facing the IHS, tighten mounting screws in a star pattern to snug. Connect the pump power cable to the CPU_FAN header. Connect the three radiator fans to a hub or CHA_FAN headers. Orient hoses so they exit from the top of the radiator toward the CPU socket, preventing air bubbles from accumulating in the pump head.

UEFI Fan Curve Configuration After Installation 💻

Enter the UEFI and set the pump to run at 100 percent speed at all times. AIO pumps are effectively silent and their sole function is circulating liquid. Set radiator fans to a custom curve: 600 RPM at 40 degrees Celsius, ramping to 100 percent speed above 80 degrees Celsius.

Run a 20 to 30 minute stress test and monitor CPU temperatures with HWiNFO64. A properly installed 360mm AIO should keep a Ryzen 9 9950X below 85 degrees Celsius under full multi-core load in a South African summer room at 28 to 30 degrees ambient.

TIP

AIO Hose Orientation Tip ⚡

Orient the pump head so hoses exit from the top of the unit. This keeps any residual air bubbles away from the pump impeller housed at the bottom of the pump head, preventing a gurgling sound that is easily avoided by correct hose routing from the start.

FAQ

Do I need to add extra thermal paste over the pre-applied paste?

No. Pre-applied thermal paste from reputable AIO manufacturers is formulated for optimal coverage. Adding more risks overflow around the IHS edges without improving thermal transfer.

How often does AIO liquid need to be replaced or topped up?

Closed-loop AIOs are sealed and do not require liquid maintenance. The manufacturer designs the liquid volume for five to seven years of rated lifespan.

Can I mount a 360mm AIO in a case that only lists 240mm top support?

No. The top panel fan mounting rail is sized for specific radiator lengths. A 360mm radiator is 120mm longer than a 240mm unit and physically does not fit in a 240mm position.

Ready to install a 360mm AIO in your gaming PC? Evetech stocks 360mm AIO liquid coolers alongside compatible ATX and E-ATX gaming cases with front and top 360mm mounting support.