Coolant temperature this AIO settles at over fan rpm, its dissipation in W/K, and the noise of its 2 stock fans. Calculated from the radiator size and thickness and the stock fan's datasheet with the RadiatorTemp model. Not measured; the bands show the spread.
| fan rpm | CFM through core | W/K | Coolant above intake, 250 W | Coolant at 30 °C intake | dB(A), 2 fans |
|---|---|---|---|---|---|
| 540 | 36 | 10.5 | +23.8 | 53.8 °C | <15 |
| 720 | 48 | 12.5 | +20.1 | 50.1 °C | <15 |
| 900 | 61 | 14.2 | +17.5 | 47.5 °C | 18.9 |
| 1080 | 73 | 15.9 | +15.7 | 45.7 °C | 22.6 |
| 1260 | 85 | 17.4 | +14.3 | 44.3 °C | 25.9 |
| 1440 | 97 | 18.9 | +13.2 | 43.2 °C | 28.7 |
| 1620 | 109 | 20.3 | +12.3 | 42.3 °C | 31.2 |
| 1800 | 121 | 21.6 | +11.6 | 41.6 °C | 33.5 |
Model values; the ±15 % band is drawn in the charts above. Change heat load, intake and target in the database view.
A radiator moves heat in proportion to the difference between coolant and incoming air: Q = q · (Tcoolant − Tair).
q depends on the air actually passing through the core. Airflow per fan is CFMmax · derate · rpm/rpmmax
with the radiator derate (0.62, or 0.72 for pressure-optimized blades) times the core-thickness factor. Per 120 mm segment at 27 mm:
q = 8.5 W/K · (airflow / 45 CFM)0.6; heat transfer over fins scales with roughly the 0.6 power of velocity.
| Core | Airflow factor | Fin area factor |
|---|---|---|
| 27 mm | 1.00 | 1.00 |
| 30 mm | 0.97 | 1.09 |
| 38 mm | 0.90 | 1.15 |
| 45 mm | 0.84 | 1.22 |
Thick cores gain fin area but lose airflow; at low rpm the net is close to zero. With fans off, natural convection is taken as 1 W/K per segment.
The band is ±15 % on q: fin density, coolant flow and preheated case air. Pump speed matters little above roughly 1 l/min.
Noise is the stock fan's curve plus 10 · log₁₀(fan count).
Air entering the radiator is case air, usually 5 to 10 K above room. Die temperatures sit above the coolant by the block and TIM delta, typically 25 to 45 K under load. Nothing here is measured; the same model runs in RadiatorTemp.