How loud are Phanteks fans?
From 9.8 to 44.3 dBA. Each figure sits on the fan's own product page, in the technical details block beside airflow, static pressure and speed.
The D30 and M25 pages call the row "Noise Level". On the T30 pages it is "Max. Noise Level" in the technical details and "Max. Sound Level" in a second table, Fan Profile Specifications, which repeats the row for each switch position. Microphone distance and test method go unmentioned everywhere, which makes a Phanteks dBA useful against another Phanteks dBA and much weaker against another brand's figure, possibly from a different setup.
Prices are missing from all of them; a "Where to buy" button points to Phanteks' resellers instead.
The T30 switch prices every step of speed
Each switch position caps the fan's top speed, and for each cap there is a noise figure, an airflow and a pressure.
| Fan | Profile | Top speed | Noise | Airflow | Pressure |
|---|
| T30-120 (120 x 120 x 30 mm) | Hybrid | 1200 RPM | 9.8 dBA | 40.3 CFM | 1.27 mm H2O |
| T30-120 | Performance | 2000 RPM | 27.3 dBA | 67.0 CFM | 3.30 mm H2O |
| T30-120 | Advanced | 3000 RPM | 39.7 dBA | 100.9 CFM | 7.37 mm H2O |
| T30-140 (140 x 140 x 30 mm) | Hybrid | 1200 RPM | 23.2 dBA | 63.2 CFM | 1.34 mm H2O |
| T30-140 | Performance | 2000 RPM | 38.1 dBA | 109.9 CFM | 3.58 mm H2O |
| T30-140 | Advanced | 2500 RPM | 44.3 dBA | 139.6 CFM | 5.41 mm H2O |
Performance is marked "Recommended", and Hybrid is "Semi-Passive", with "0 RPM below 50% PWM signal for absolute silence".
One gap stands out. At the same 1200 RPM cap, the 140mm fan reads 23.2 dBA and the 120mm fan 9.8, a 13.4 dBA difference nobody explains, and at 2000 RPM the gap is still 10.8 dBA.
What is the quietest Phanteks 120mm fan?
The T30-120 in Hybrid, at 9.8 dBA. Among single figures printed without a speed, the D30-120's 30.2 dBA is lowest.
| Depth | Fan | Noise | Speed | Airflow | Pressure |
|---|
| 30 mm | D30-120 regular | 30.2 dBA | 250 to 2000 RPM | 64.3 CFM | 3.01 mm H2O |
| 30 mm | D30-120 reverse | 31.8 dBA | | 61.5 CFM | 2.72 mm H2O |
| 30 mm | T30-120 top figure | 39.7 dBA | 3000 RPM | 100.9 CFM | 7.37 mm H2O |
| 25 mm | M25 G2 120, D-RGB and plain black | 35.13 dBA | 350 to 2000 RPM | 72.72 CFM | 2.51 mm H2O |
| 25 mm | M25-120, first generation, D-RGB and plain black | 35.7 dBA | 500 to 2000 RPM | 84.26 CFM | 2.67 mm H2O |
| 25 mm | M25 G2 120 reverse | 39.28 dBA | | 73.69 CFM | 1.99 mm H2O |
Which speed the D30 and M25 figures belong to goes unsaid. Both families share a 2000 RPM ceiling with the T30-120's Performance profile, rated 27.3 dBA there, but without a stated speed the two are not set side by side here.
Which Phanteks 140mm fan is quietest?
On a speed-tied figure, the T30-140 in Hybrid at 23.2 dBA. The D30-140's 29.5 dBA is the lowest single figure at this size.
| Depth | Fan | Noise | Speed | Airflow | Pressure |
|---|
| 30 mm | D30-140 regular | 29.5 dBA | 250 to 1800 RPM | 71.93 CFM | 3.32 mm H2O |
| 30 mm | D30-140 reverse | 32.1 dBA | | 71.76 CFM | 3.08 mm H2O |
| 30 mm | T30-140 top figure | 44.3 dBA | 2500 RPM | 139.6 CFM | 5.41 mm H2O |
| 25 mm | M25 G2 140, D-RGB and plain black | 36.40 dBA | 350 to 1800 RPM | 101.78 CFM | 2.23 mm H2O |
| 25 mm | M25-140, first generation | 36.57 dBA | 500 to 1800 RPM | 104.62 CFM | 2.80 mm H2O |
| 25 mm | M25 G2 140 reverse | 40.95 dBA | | 100.07 CFM | 2.04 mm H2O |
The D30-140 is the only Phanteks fan whose single figure undercuts its 120mm sibling's, by 0.7 dBA, with a top speed 200 RPM lower. On the M25 G2 and the T30, the bigger fan carries the higher figure.
Reverse-blade models always list more
In every pair, the reverse model reads higher than its regular twin, by 1.6 to 4.55 dBA, and no reason is given. The D30 and M25 G2 come both ways, described as "Air moves from front to rear" and "Air moves from rear to front", so that the lit side of a fan can face the window when it is mounted as an exhaust or on a bottom intake.
| Fan | Regular | Reverse |
|---|
| D30-120 | 30.2 | 31.8 |
| D30-140 | 29.5 | 32.1 |
| M25 G2 120 | 35.13 | 39.28 |
| M25 G2 140 | 36.40 | 40.95 |
The D30 pair sits closest. A build that needs reverse fans for looks loses the fewest dBA with the D30. Neither the T30 nor the first generation M25 has a reverse model.
How loud is a Phanteks Glacier One AIO?
Pump at 20.0 dBA, or 18.0 on the 360S25-SE, and fans at 20.0 to 35.13 dBA, each figure in its own block of the spec table. Every pump figure is given at "3100 RPM ± 10% (100% Duty Cycle)".
| Part | Figure | Glacier One models |
|---|
| Pump | 18.0 dBA | 360S25-SE |
| Pump | 20.0 dBA | 240D30, 360D30, 420D30, 360D30 X2, 420D30 X2, 360M25-LCD, 360M25G2 |
| Fans | 20.0 dBA | 360S25-SE, for its S25-360 single-frame fan unit |
| Fans | 29.5 dBA each | 420D30 and 420D30 X2, three D30-140 fans |
| Fans | 30.2 dBA each | 240D30 (two fans) and 360D30 (three), D30-120 fans |
| Fans | 35.13 dBA each | 360M25-LCD and 360M25G2 (M25 G2 120 fans), and the 360D30 X2 (D30-120 fans, see the next section) |
The S25-360 figure is hard to place. It covers a frame holding three fan sections, and nothing says whether the 20.0 dBA is per section or for the frame, so it cannot be ranked against the per-fan D30 and M25 figures.
The two Phanteks air coolers, the Polar ST5 and Polar ST4, each ship with one first generation M25-120 fan rated 35.7 dBA. Other makers' liquid coolers are in our AIO cooler guide.
Seven pages that contradict another Phanteks page
Two of the contradictions involve a noise figure.
| Page | What does not match |
|---|
| Glacier One 360D30 X2, black and white | The fan block names the "D30-120 D-RGB" but prints "Air Flow 72.72 CFM" and "Sound Level 35.13 dBA", the M25 G2 120's numbers. The D30-120 page and the 360D30 cooler page both give 64.3 CFM and 30.2 dBA. The X2 is listed here at the figure it prints, with a flag |
| Glacier One 360M25-LCD and 360M25G2 | Both give their M25 G2 fans as "120 x 120 x 30 mm"; the fan's own page says 25 mm |
| T30-140 | The feature text gives the blade tip clearance as "0.8 mm" in one paragraph and a "Parallel 0.9 mm gap" in another |
| Polar ST5 and ST4 | The cooler pages give the M25-120 a "400 ~ 2000" RPM range; the fan's own page says 500 to 2000. The 35.7 dBA figure matches |
The 360M25G2 page has one more slip: a gross weight of "16.95 kg | 37.36 lbs", against 2.95 kg net.
What do the quieter Phanteks fans give up?
Speed, airflow and usually pressure, and the T30 tables show the cost most clearly. In Hybrid the T30-120 reads 9.8 dBA with 40.3 CFM and 1.27 mm H2O. In Advanced it reads 39.7 dBA with 100.9 CFM and 7.37 mm H2O, two and a half times the air and almost six times the pressure for 29.9 dBA more.
Across families the trade is messier. The D30-140 lists 6.9 dBA less than the M25 G2 140 and more pressure, 3.32 against 2.23 mm H2O, but 29.85 fewer CFM. Behind an open mesh front the M25 G2's airflow may count for more; on a radiator, pressure wins.
A fan with too little pressure for its job gets turned up, and then its quiet figure stops applying.
Fans that come fitted in cases are covered in our PC case guide, and ways to slow fans you already own are in how to make PC fans quieter.
Discontinued fans and coolers
Phanteks' end of life page lists nine older fan models, the SP 120 and SP 140, XP 120 and XP 140, FS 140, HP 140, MP 120, and SK 120 and SK 140, along with seven earlier Glacier One coolers: the 240MP, 280MP and 360MP, the 240MPH, 280MPH and 360MPH, and the 240T30. None of them appears on this page.
The menu on November 7, 2026 showed four fan families (T30, D30, M25G2 and M25) and five Glacier One lines (S25-SE, M25 LCD, D30 X2, D30 and M25G2), and every model above came from those pages. The first generation M25 is still on the menu with a five year warranty, against three on the M25 G2, though no new single fan listing for it turned up on Amazon on November 7.
