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Noctua NH-U9 DX-4677 vs Noctua NH-L9x65 — Head-to-Head (2026)

Side-by-side comparison. Specs, prices, user ratings, and our verdict.

Noctua NH-U9 DX-4677, High-Performance Server/Workstation CPU Cooler | Compact 125mm 4U Height, Low-Noise Cooling, 5 Heatpipes, For Xeon LGA4677 & LGA4710, Dual 92mm Fans, Rich Accessory Kit

Noctua NH-U9 DX-4677, High-Performance Server/Workstation CPU Cooler | Compact 125mm 4U Height, Low-Noise Cooling, 5 Heatpipes, For Xeon LGA4677 & LGA4710, Dual 92mm Fans, Rich Accessory Kit

$129.95
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vs
Noctua NH-L9x65, Quiet High-Performance Low-Profile CPU Cooler | 65mm Height, ITX SFF Low-Noise Cooling, For Intel and AMD, 92mm Slim Fan, No RAM or PCIe Overhang, Rich Accessory Kit

Noctua NH-L9x65, Quiet High-Performance Low-Profile CPU Cooler | 65mm Height, ITX SFF Low-Noise Cooling, For Intel and AMD, 92mm Slim Fan, No RAM or PCIe Overhang, Rich Accessory Kit

$69.95
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*Price sourced from Amazon.com. Price and availability subject to change.

Spec-by-spec

SpecNoctua NH-U9 DX-4677, High-Performance…Noctua NH-L9x65, Quiet High-Performance…
BrandNoctuaNoctua
ModelNH-U9 DX-4677NH-L9x65
Voltage12 volts12 volts
MaterialCopper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel platingCopper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Unit Count1 Count1 Count
Noise Level30.6 db23.6 db
Part NumberNH-U9 DX-4677NH-L9x65
Material TypeCopper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel platingCopper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Cooling MethodAirAir
Number of Items11
Number of Packs11
Air Flow Capacity96.3 cubic meter per hour57.5 cubic meter per hour
Compatible DevicesDesktopDesktop
Included Components1 PackItem

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