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Ehume's Vortez review of NF-A14 and NF-A15 on NH-D14

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http://www.vortez.net/articles_pages/noctua_a_series_fans,8.html
Quote:
Finally, the orientation question. When the TY-140 was tested on the same NH-D14, the CPU appeared to be 1-2°C cooler when the fan was oriented with the long axis parallel to the mainboard. No formal testing of was done at the time, however. So, now was a great time to test whether the Noctua NH-A15, with the same dimensions as the TY-140, would the show any difference in cooling on the NH-D14 whether its long axis stuck out from the fin stacks on both sides (long axis parallel to the mainboard), or whether sticking one square side down between the fin stacks would give better cooling. Noctua sent out extra clips so this could be tested.

No difference. With nearly identical ambient temperatures, CPU net temperatures (TOA) were 0-0.1°C apart. That is as close to identical as you will get. So it makes no difference how you orient your fan on the NH-D14.

Interesting note on fan orientation.

I wonder how the NF-A14 PWM would do though:
Noctua's claims
Quote:
Rotational Speed (+/- 10%) 1500 RPM
Rotational Speed with L.N.A. (+/- 10%) 1200 RPM
Min. Rotational Speed (PWM) 300 RPM
Airflow 140,2 m³/h
Airflow with L.N.A. 115,5 m³/h
Acoustical Noise 24,6 dB(A)
Acoustical Noise with L.N.A. 19,2 dB(A)
Static Pressure 2,08 mm H2O
Static Pressure with L.N.A. 1,51 mm H2O

The specs with LNA are the same as the FLX
Quote:
Rotational Speed (+/- 10%) 1200 RPM
Rotational Speed with L.N.A. (+/- 10%) 1050 RPM
Rotational Speed with U.L.N.A. (+/- 10%) 900 RPM
Airflow 115,5 m³/h
Airflow with L.N.A. 101,9 m³/h
Airflow with U.L.N.A. 88,7 m³/h
Acoustical Noise 19,2 dB(A)
Acoustical Noise with L.N.A. 16,4 dB(A)
Acoustical Noise with U.L.N.A. 13,8 dB(A)
Static Pressure 1,51 mm H2O
Static Pressure with L.N.A. 1,18 mm H2O
Static Pressure with U.L.N.A. 0,89 mm H2O

115.5m³/h is ~68CFM but Ehume managed 78CFM out of the NF-A14 FLX

On the other hand a bunch of reviews I've read put the Thermalright TY-140 at about 70CFM, which is close to their 74CFM rated spec
Edited by AlphaC - 7/1/13 at 8:29pm
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post #2 of 2
ehume does a nice job of testing in his reviews. thumb.gif
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