Quick Answer
A 240mm AIO is enough for most couch co-op gaming PCs, while a 360mm AIO is mainly for hotter CPUs, quieter sustained loads, and larger cases. Expect a 360mm unit to cost roughly R1,000-R2,500 more and to reduce CPU temperatures by about 3-8 C when the processor is working hard.
What the bigger radiator changes
A 240mm AIO uses two 120mm fans; a 360mm AIO uses three. That extra radiator surface helps with a Ryzen 9, Core i7, or Core i9 under long sessions, OBS encoding, or 4K export work. For EA Sports FC, It Takes Two, LEGO titles, fighting games, it usually does not create a large fps jump by itself.
The benefit is steadier boost clocks and lower noise. If the same CPU stays below its thermal limit on a 240mm cooler, the 360mm AIO may feel smoother but not dramatically faster.
Price and case fit for SA buyers
Broad SA price bands put many 240mm AIOs around R1,500-R3,200 and many 360mm AIOs around R2,800-R5,500. Examples to compare include DeepCool LS520 or Corsair H100i-class 240mm units and DeepCool LS720, Corsair H150i, or Arctic Liquid Freezer III 360-class units.
Before buying, check radiator support at the top or front of the case, RAM height, and GPU length. A 360mm radiator that blocks airflow or forces awkward tubes can be worse than a clean 240mm installation.
Best pick by workload
For couch co-op gaming with a Ryzen 5, Ryzen 7, Core i5, or efficient Core i7, choose a good 240mm AIO and put more budget into the GPU or monitor. Choose 360mm when the CPU is 170W-class, the case has proper space, or the PC will stream, render, and game for hours.
FAQ
Does a 360mm AIO increase fps?
Only indirectly. It can protect boost clocks if the CPU was overheating, but most gaming fps gains come from the GPU and CPU tier rather than radiator size.
Is a 240mm AIO too small for couch co-op gaming?
No, not for most mid-range gaming CPUs. It becomes limiting mainly on hot high-end chips, poor airflow cases, or long all-core workloads.
What should I check before ordering a 360mm AIO?
Check top and front radiator support, case length, fan clearance, and motherboard heatsink space. A 360mm AIO needs a case designed for it.