Coolant temperature this AIO settles at over fan rpm, its dissipation in W/K, and the noise of its 3 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), 3 fans |
|---|---|---|---|---|---|
| 500 min | 39 | 12.0 | +20.8 | 50.8 °C | <15 |
| 540 | 42 | 12.6 | +19.8 | 49.8 °C | <15 |
| 720 | 56 | 15.0 | +16.7 | 46.7 °C | 17.9 |
| 900 | 70 | 17.1 | +14.6 | 44.6 °C | 22.1 |
| 1080 | 83 | 19.1 | +13.1 | 43.1 °C | 25.9 |
| 1260 | 97 | 21.0 | +11.9 | 41.9 °C | 29.2 |
| 1440 | 111 | 22.7 | +11.0 | 41.0 °C | 32.1 |
| 1620 | 125 | 24.4 | +10.3 | 40.3 °C | 34.6 |
| 1800 | 139 | 26.0 | +9.6 | 39.6 °C | 36.9 |
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.