Noctua S12B FLX vs Noctua S12B redux-700

A side-by-side spec comparison of the Noctua S12B FLX and the Noctua S12B redux-700. We line up every specification and score the ones that matter most in this category — weighted, not a raw count of specs won — to reach an overall verdict so you can decide which case fan is right for your build.

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Side-by-side specification comparison of Noctua S12B FLX and Noctua S12B redux-700.
Specification	Noctua S12B FLX $16.90 Newegg price as of Oct 22, 18:01 UTC Buy on Newegg	Noctua S12B redux-700 $16.95 Amazon price as of Oct 23, 00:02 UTC Buy on Amazon
RGB	No	No
RPM	{"max":600,"min":600}	{"max":700,"min":700}
Size	120"	120"
Noise Level	6 dBA	6.8 dBA
Airflow (CFM)	28.95 CFM	33.49 CFM
Quantity	1	1

Too close to call — these products trade blows on the specs that matter.

Noctua S12B FLX

performance point

Noctua S12B redux-700

performance point

Winner is scored by weighting the specs that matter most in this category (not a raw count of specs won).

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