Which size AIO do I need?

Deciding on which size AIO you need is relatively simple. The short answer is that you should get the biggest AIO that you can fit in your PC case. Below you'll find some pointers that should help.

• Small Cases (Mini-ITX, Micro-ATX): Opt for a 240mm or 120mm radiator. If limited to 120mm, the CORSAIR Hydro H60x is a good option.
• Mid-Tower Cases: 240mm or 280mm radiators, like the CORSAIR iCUE LINK TITAN 240 RX or the iCUE LINK H115i balance performance and noise.
• Full-Tower Cases: A 360mm radiator, such as the iCUE LINK TITAN 360 RX, provides top cooling performance, though with higher noise. 420mm may also fit in some cases.

Cooling Needs:

• Casual users don’t need heavy cooling; a 240mm or 280mm coolers are sufficient.
• For overclocking or resource-heavy tasks, a 360mm cooler is better for optimal performance.

Noise Levels:

• Larger radiators (280mm, 360mm, 420mm) generally run quieter due to slower fan speeds.

Future Upgrades:

• If planning for higher performance or overclocking, consider a 280mm or 360mm cooler for future upgradeability.

Conclusion:

• Casual use: 240mm or 280mm AIOs for mid-tower cases. 120mm may be the best if tight on space.
• High performance: 360mm AIO, or, if your case supports it, a 420mm AIO. full and mid-tower cases commonly support a 360mm, but 420mm is less common. Make sure to check compatibility before buying.

It's worth mentioning that the orientation of the AIO can have an effect on the performance and noise of the pump. It is good practice to mount the AIO in such a way that has the pump at the lowest point of the loop. Read our page about AIO cooler orientation for more info.