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bryanwann: Pinout difference
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bryanwann: OEM fans 25.something mm wide
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bryanwann: Fan shroud and fan connectors
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bryanwann: 46 dB at inlet after Noctua swap
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bryanwann: Cisco 2821 backside
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bryanwann: Fan tray
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bryanwann: 51.3 dB with original fans at 1-ish meter
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bryanwann: PVDM slots
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bryanwann: After Noctua swap
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bryanwann:
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bryanwann: Original Delta AFB0812SH-F00 fans
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bryanwann: 66.5 dB right at inlet with original fans
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bryanwann: Original fans at idle, around 2500 RPM
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bryanwann: Original fan, 80 mm
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bryanwann: Installing PVDM2-48 cards
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bryanwann: Noise after Noctua swap 44.4 dB
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bryanwann: Cisco 2821 internals
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bryanwann: Noctua speed signal
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bryanwann: Delta frequency generator/tach output