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EFZ-92HA3 review
The 92mm fan on the SilenX EFZ-92HA3 heatsink rotates at up to 2200RPM which creates just 41.6 dBA noise. At its reduced fan speed of 800RPM, the EFZ-92HA3 heatsink hums along at 33.0dBA noise, which is a pretty quiet. At full fan speed the EFZ-92HA3 heatsink maintained a CPU die temperature of 17.1°C at stock fan speed and 29.0°C at reduced fan speed. Where the EFZ-92HA3 heatsink falls into its own is on sub-85W TDP processors where CPU heat output is much better matched to its diminutive size and 92mm cooling fan.
EFZ-92HA3 detailsfrostytech review 
EFX-12-12 review
The fan came with very detailed instructions and specifications which we applaud for its clarity and completeness. When compared to our original Zalman fan, the temperature difference is slight at full 12v, but the Zalman fan is spinning 300-400RPM faster and with proportionately more noise. The fan doesn't offer much in the way of frills, but it offers great performance at an affortable price, it deserves our medal.
EFX-12-12 detailsthe overclock hole review 