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 |
|---|---|---|---|---|---|
| 630 | 39 | 12.0 | +20.8 | 50.8 °C | <15 |
| 840 | 51 | 14.3 | +17.5 | 47.5 °C | 17.0 |
| 1050 | 64 | 16.4 | +15.3 | 45.3 °C | 21.0 |
| 1260 | 77 | 18.2 | +13.7 | 43.7 °C | 24.8 |
| 1470 | 90 | 20.0 | +12.5 | 42.5 °C | 28.0 |
| 1680 | 103 | 21.7 | +11.5 | 41.5 °C | 30.9 |
| 1890 | 116 | 23.3 | +10.7 | 40.7 °C | 33.4 |
| 2100 | 129 | 24.8 | +10.1 | 40.1 °C | 35.7 |
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.