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 |
|---|---|---|---|---|---|
| 360 | 28 | 8.9 | +27.9 | 57.9 °C | <15 |
| 480 | 37 | 10.6 | +23.5 | 53.5 °C | <15 |
| 600 | 46 | 12.2 | +20.6 | 50.6 °C | <15 |
| 720 | 56 | 13.6 | +18.4 | 48.4 °C | <15 |
| 840 | 65 | 14.9 | +16.8 | 46.8 °C | 16.5 |
| 960 | 74 | 16.1 | +15.5 | 45.5 °C | 19.0 |
| 1080 | 84 | 17.3 | +14.5 | 44.5 °C | 21.4 |
| 1200 | 93 | 18.4 | +13.6 | 43.6 °C | 23.6 |
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.