When we compare the Alphacool Apex Stealth Metal Power Fan with Noctua’s top model, the difference is clearly visible and audible. It’s moments like these when one doesn’t feel bad using the word “revolution” instead of “evolution.” The audio recordings are clearer this time, the reason for which I’ve already explained in detail. I would have preferred to avoid this issue, but to measure below 20 dBA, one has to upgrade. Once again.
Alphacool Apex Stealth Metal Power Fan (Vorserie) [120 mm] vs Noctua NF-A12x25 PWM (2023) [120 mm]
General
Vendor
Alphacool
Noctua
Product name
Apex Stealth Metal Power Fan (Vorserie)
NF-A12x25 PWM (2023)
Dimension
120 mm
120 mm
Height
25 mm
25 mm
Weight
320 g
198 g
Official Datasheet
Minimum RPM
400 U/min
450 U/min
Maximum RPM
3000 U/min
2000 U/min
Min Consumption
0.6 W
1.2 W
Max Consumption
6.2 W
1.7 W
Airflow (CFM)
116.9 CFM
60.1 CFM
Airflow (m³/h)
198.0 m³/h
102.1 m³/h
Static Pressure (mmH2O)
6.22 mmH2O
2.34 mmH2O
Sound
40.0 dBA
22.6 dBA
Features
PWM
✓
✓
RGB
×
×
Noise Absorption
✓
✓
Colors
Frame
Silver
Beige
Highlight
-
Brown
Rotor
Black
Brown
Measures DC
Start-Up Voltage
4.5 V
4.7 V
Shut-Down Voltage
4.2 V
4.3 V
Start-Up DC
701 U/min
870 U/min
Shut-Down DC
689 U/min
854 U/min
Measures PWM
Start-Up RPM
301 U/min
588 U/min
Shut-Down RPM
221 U/min
237 U/min
Other Measures
Max RPM
3022 U/min
2077 U/min
No-Stop RPM
N/A
N/A
column_boost_rpm
522 U/min
448 U/min
Airflow (CFM)
Case Fan (1000 RPM)
45.9 CFM
+30.9 %
35.0 CFM
Radiator 25mm (1000 RPM)
38.6 CFM
+65.2 %
23.4 CFM
Radiator 45mm (1000 RPM)
42.4 CFM
+130.4 %
18.4 CFM
Radiator 60mm (1000 RPM)
44.4 CFM
+123.1 %
19.9 CFM
Airflow (m³/h)
Case Fan (1000 RPM)
77.9 m³/h
+30.9 %
59.5 m³/h
Radiator 25mm (1000 RPM)
65.6 m³/h
+65.2 %
39.7 m³/h
Radiator 45mm (1000 RPM)
72.1 m³/h
+130.4 %
31.3 m³/h
Radiator 60mm (1000 RPM)
75.4 m³/h
+123.1 %
33.8 m³/h
Static Pressure (mmH2O)
Case Fan (1000 RPM)
1.94 mmH2O
+35.7 %
1.43 mmH2O
Radiator 25mm (1000 RPM)
1.63 mmH2O
+59.8 %
1.02 mmH2O
Radiator 45mm (1000 RPM)
1.84 mmH2O
+124.4 %
0.82 mmH2O
Radiator 60mm (1000 RPM)
1.84 mmH2O
+80.4 %
1.02 mmH2O
Static Pressure (hPa)
Case Fan (1000 RPM)
0.19 hPa
+35.7 %
0.14 hPa
Radiator 25mm (1000 RPM)
0.16 hPa
+60.0 %
0.10 hPa
Radiator 45mm (1000 RPM)
0.18 hPa
+125.0 %
0.08 hPa
Radiator 60mm (1000 RPM)
0.18 hPa
+80.0 %
0.10 hPa
Sound
Case Fan (1000 RPM)
19.2
-38.1 %
31
Radiator 25mm (1000 RPM)
19.5
-42.1 %
33.7
Radiator 45mm (1000 RPM)
19.3
-42.7 %
33.7
Radiator 60mm (1000 RPM)
19.3
-40.6 %
32.5
Airflow (m³/h) vs Static Pressure (mmH2O)
Airflow (CFM) vs Static Pressure (hPa)
Compare Sound
Case Fan
- 301
- 501
- 701
- 901
- 1101
- 1301
- 1501
- 1701
- 1901
- 2101
- 2301
- 2501
- 2701
- 2901
- 588
- 788
- 988
- 1188
- 1388
- 1588
- 1788
- 1988
25mm Radiator
- 301
- 501
- 701
- 901
- 1101
- 1301
- 1501
- 1701
- 1901
- 2101
- 2301
- 2501
- 2701
- 2901
- 588
- 788
- 988
- 1188
- 1388
- 1588
- 1788
- 1988
45mm Radiator
- 301
- 501
- 701
- 901
- 1101
- 1301
- 1501
- 1701
- 1901
- 2101
- 2301
- 2501
- 2701
- 2901
- 588
- 788
- 988
- 1188
- 1388
- 1588
- 1788
- 1988
60mm Radiator
- 301
- 501
- 701
- 901
- 1101
- 1301
- 1501
- 1701
- 1901
- 2101
- 2301
- 2501
- 2701
- 2901
- 588
- 788
- 988
- 1188
- 1388
- 1588
- 1788
- 1988
Pages:
- 1 - Introduction and technical data
- 2 - Causes of noise development and vibrations
- 3 - The secret of decoupling and the used material
- 4 - Apex Stealth Metal Power Fan: Measurement results in detail.
- 5 - Comparison with the Noctua NF-A12x25 PWM (2023)
- 6 - Comparison with the Be Quiet! Silentwings Pro 4
- 7 - Comparison with the Cooler Master Mobius 120
- 8 - Summary and conlusion
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