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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-08-15 review
These fans are easy to iunstall and performed much better than the stock fans in our benchmark tests while running quieter. It's the same series of fans used on their Effizio CPU coolers, which performed better than the stock heatsink at much lower noise levels, but available in multiple sizes and noise levels.
EFX-08-15 detailsnoticias3d review 