Heatsink Selector
Calculate required thermal resistance and find suitable heatsinks
Requirements
10°C below TJ(max)
Thermal Budget Analysis
Thermal Budget
100°C
Total RθJA Max
3.33
°C/W
Required RθSA
2.53
°C/W
Heatsink Options
Intel Stock Cooler
70×70×50mm | Forced Air
0.35 °C/W
86% margin
Aavid 423K (400LFM)
100×100×40mm | Forced Air
0.45 °C/W
82% margin
Fischer SK 576 (400LFM)
75×75×40mm | Forced Air
0.55 °C/W
78% margin
Aavid 423K (200LFM)
100×100×40mm | Forced Air
0.7 °C/W
72% margin
Fischer SK 576 (200LFM)
75×75×40mm | Forced Air
0.85 °C/W
66% margin
Aavid 576802B00000G
100×100×30mm | Natural
1.2 °C/W
53% margin
Fischer SK 89 75
75×75×30mm | Natural
1.6 °C/W
37% margin
Aavid 507302B00000G
75×75×25mm | Natural
1.8 °C/W
29% margin
Wakefield 517
63×63×25mm | Natural
2.1 °C/W
17% margin
Fischer SK 129 50.8
50×50×25mm | Natural
2.5 °C/W
1% margin
Fischer SK 104 50.8
50×25×25mm | Natural
3.8 °C/W
Need 50% lower
Fischer SK 104 25.4
25×25×25mm | Natural
6.5 °C/W
Need 157% lower
Note: RθSA values depend on orientation, airflow, and mounting. Verify with manufacturer data. Forced air values shown are for ~200-400 LFM (1-2 m/s).