Buying Guide
The Best CPU Cooler Fans
Five case fans compared, from the AM-120-K to the M25-120, with the trade-offs of each named.
By The PC Journal editorial team
12 min read5 products evaluated
A replacement or second fan for a CPU tower or radiator needs enough static pressure to push air through dense fins, and a mounting size that matches the cooler's clips. Every pick here is a 120mm single fan or a two-pack that lists either a pressure rating of 1.5 mmH2O or more or a top speed of 1,500 RPM or more.
Our comparison rests on published figures for fans in box, max speed and rated airflow; where a maker leaves out rated airflow, we say so, and no figure here comes from our own testing.
Quick Picks
Our 5 recommendations at a glance. Tap a pick for the full verdict.
Highest Rated Airflow
ID-COOLING AM-120-K 120mm PWM Fan
The highest rated airflow here (79.7 CFM).
Best for: Intake fans in a mesh-front case.
Our take Check price for ID-COOLING AM-120-K 120mm PWM Fan (opens in a new tab)
Also Consider
CORSAIR RS120 120mm PWM Fan (single)
A daisy-chain connection from one PWM header.
Best for: Buyers who want daisy-chain connection from one PWM header.
Our take Check price for CORSAIR RS120 120mm PWM Fan (single) (opens in a new tab)
ARGB Lighting
Cooler Master MF120 Halo² ARGB 120mm PWM Fan
An ARGB lighting.
Best for: Buyers who want an ARGB lighting.
Our take Check price for Cooler Master MF120 Halo² ARGB 120mm PWM Fan (opens in a new tab)
Strong Alternative
Noctua NF-P12 redux-1700 PWM 120mm
A pressure-optimised blade design.
Best for: Buyers who want pressure-optimised blade design.
Our take Check price for Noctua NF-P12 redux-1700 PWM 120mm (opens in a new tab)
Premium Pick
Phanteks M25-120 120mm PWM Fan (single)
The top of this price range, adding a 500 to 2,000 RPM PWM range.
Best for: Spending more than the NF-P12 redux costs for the fullest feature set in this group.
Our take Check price for Phanteks M25-120 120mm PWM Fan (single) (opens in a new tab)
Our Picks
Highest Rated Airflow1 of 5
ID-COOLING AM-120-K 120mm PWM Fan on Amazon (opens in a new tab)
The AM-120-K is built around a 79.7 CFM airflow rating, with a 3.65 mmH2O pressure rating on top.
Best for
- Intake fans in a mesh-front case.
Skip if
- Choose another pick if you can't accept this: sold as a single fan, so a full case costs more.
Why we like it
On the spec sheet, it comes as 1 fan and offers a 2500 RPM top speed. Its 2500 RPM top speed is the highest here; the RS120 comes next at 2100 RPM. It also comes with a plain black frame without lighting.
Check that your case has 120mm mounts in the positions you plan to use, and how many fan headers your motherboard offers. It was the cheapest of the group when we checked; the RS120 was the next step up. The main gap: static pressure of 3.65 mmH2O, behind the RS120 (4.15 mmH2O). If that matters, the RS120 offers 4.15 mmH2O.
Key dimensions & specs
- Fans in box: 1 fan
- Max speed: 2500 RPM
- Rated airflow: 79.7 CFM
- Static pressure: 3.65 mmH2O
- Bearing: Hydraulic
- Lighting: None
Pros
- a 2500 RPM top speed for radiators
- 79.7 CFM rated airflow
- 3.65 mmH2O static pressure for radiators and filters
- a Hydraulic bearing
Cons
- Sold as a single fan, so a full case costs more
- Static pressure of 3.65 mmH2O, behind the RS120 (4.15 mmH2O)
Also Consider2 of 5
CORSAIR RS120 120mm PWM Fan (single) on Amazon (opens in a new tab)
The RS120 stands out for a daisy-chain connection from one PWM header, and it adds 4.15 mmH2O of rated static pressure.
Best for
- Buyers who want daisy-chain connection from one PWM header.
Skip if
- Look at the others if this bothers you: sold as a single fan, so a full case costs more.
Why we like it
It also comes as 1 fan and offers a 2100 RPM top speed. Its 2100 RPM top speed ranks second of 5 here, behind the AM-120-K (2500 RPM) and ahead of the NF-P12 redux (1700 RPM). You also get AirGuide anti-vortex vanes.
Check that your case has 120mm mounts in the positions you plan to use, and how many fan headers your motherboard offers. Another plus: 72.8 CFM rated airflow. You also get this: a Magnetic dome bearing. It was priced above the AM-120-K and below the MF120 Halo2 at the time of writing.
Key dimensions & specs
- Fans in box: 1 fan
- Max speed: 2100 RPM
- Rated airflow: 72.8 CFM
- Static pressure: 4.15 mmH2O
- Bearing: Magnetic dome
- Lighting: None
Pros
- 72.8 CFM rated airflow
- 4.15 mmH2O static pressure for radiators and filters
- a Magnetic dome bearing
- Daisy-chain connection from one PWM header
Cons
- Sold as a single fan, so a full case costs more
- Costs more than the AM-120-K at the time of writing
ARGB Lighting3 of 5
Cooler Master MF120 Halo² ARGB 120mm PWM Fan on Amazon (opens in a new tab)
The MF120 Halo2 is built around dual-loop ARGB rings, with a 0 to 2,050 RPM PWM range on top.
Best for
- Buyers who want an ARGB lighting.
Skip if
- Worth skipping when sold as a single fan, so a full case costs more is a problem.
Why we like it
On the spec sheet, it comes as 1 fan and offers a 2050 RPM top speed. On top speed it sits mid-pack at 2050 RPM: the AM-120-K offers 2500 RPM, and the NF-P12 redux comes in at 1700 RPM. You also get frosted blades that spread the lighting.
Check that your case has 120mm mounts in the positions you plan to use, and how many fan headers your motherboard offers. ARGB lighting needs a 5V 3-pin ARGB header or the included controller; do not connect it to a 12V RGB header. Its price falls between the RS120 and the NF-P12 redux, based on our last check. Buyers who need a confirmed rated airflow should compare it with the AM-120-K, which offers 79.7 CFM.
Key dimensions & specs
- Fans in box: 1 fan
- Max speed: 2050 RPM
- Lighting: ARGB
Pros
- ARGB lighting
- Dual-loop ARGB rings
- 0 to 2,050 RPM PWM range
- Frosted blades that spread the lighting
Cons
- Sold as a single fan, so a full case costs more
- Costs more than the AM-120-K at the time of writing
Strong Alternative4 of 5
Noctua NF-P12 redux-1700 PWM 120mm on Amazon (opens in a new tab)
What the NF-P12 redux brings to the table is a pressure-optimised blade design, plus a rated life above 150,000 hours.
Best for
- Buyers who want pressure-optimised blade design.
Skip if
- Choose another pick if you can't accept this: sold as a single fan, so a full case costs more.
Why we like it
It also comes as 1 fan and offers a 1700 RPM top speed. Its 1700 RPM top speed is the lowest in this group; the AM-120-K leads at 2500 RPM. It also comes with a low price for a Noctua fan.
Check that your case has 120mm mounts in the positions you plan to use, and how many fan headers your motherboard offers. It was priced above the MF120 Halo2 and below the M25-120 at the time of writing.
Key dimensions & specs
- Fans in box: 1 fan
- Max speed: 1700 RPM
- Rated noise: 25.1 dB(A)
- Lighting: None
Pros
- Pressure-optimised blade design
- Rated life above 150,000 hours
- Low price for a Noctua fan
Cons
- Sold as a single fan, so a full case costs more
- Top speed trails the AM-120-K (2500 RPM)
- Costs more than the AM-120-K at the time of writing
Premium Pick5 of 5
Phanteks M25-120 120mm PWM Fan (single) on Amazon (opens in a new tab)
What the M25-120 brings to the table is a 500 to 2,000 RPM PWM range, plus a daisy-chain cable between fans.
Best for
- Spending more than the NF-P12 redux costs for the fullest feature set in this group.
Skip if
- Look at the others if this bothers you: sold as a single fan, so a full case costs more.
Why we like it
It also comes as 1 fan and offers a 2000 RPM top speed. On top speed it sits mid-pack at 2000 RPM: the AM-120-K offers 2500 RPM, and the NF-P12 redux comes in at 1700 RPM. It also comes with tuning for fine mesh filters, heatsinks and radiators.
Check that your case has 120mm mounts in the positions you plan to use, and how many fan headers your motherboard offers. It was the most expensive pick when we checked, so weigh what it adds over the NF-P12 redux. If pack size is your priority, the AM-120-K (1 fan) is the stronger choice.
Key dimensions & specs
- Fans in box: 1 fan
- Max speed: 2000 RPM
- Lighting: None
Pros
- 500 to 2,000 RPM PWM range
- Daisy-chain cable between fans
- Tuning for fine mesh filters, heatsinks and radiators
- Top speed of 2000 RPM, ahead of the NF-P12 redux
Cons
- Sold as a single fan, so a full case costs more
- Costs more than the AM-120-K at the time of writing
How We Chose These CPU Cooler Fans
Each pick was assessed across 4 criteria weighted for real-world use.
- What we compared
- We compared five case fans on pack size, top speed, rated airflow and static pressure, using each maker's published specs. These are research figures, not bench results: 3 of 5 picks leave out rated airflow.
- The shared baseline
- All 5, from the AM-120-K to the M25-120, state pack size, top speed and lighting.
- Where the specs have gaps
- The MF120 Halo2, the NF-P12 redux and the M25-120 give no rated airflow; the MF120 Halo2, the NF-P12 redux and the M25-120 give no static pressure.
- Price range
- From the AM-120-K to the M25-120, all sat in the under $50 tier when we checked.
What to Look for in a CPU Cooler Fan
Key buying criteria so you get the right fit the first time.
Top speed
Here top speed runs from 1700 RPM on the NF-P12 redux to 2500 RPM on the AM-120-K, a 47% spread. Start with the AM-120-K if top speed decides it.
How much rated airflow you need
The AM-120-K tops rated airflow at 79.7 CFM and the RS120 sits lowest at 72.8 CFM. The AM-120-K is the pick for rated airflow. The MF120 Halo2, the NF-P12 redux and the M25-120 give no rated airflow figure, so 2 of 5 picks are compared here.
How much static pressure you need
Across these 2 picks static pressure spans 3.65 mmH2O (the AM-120-K) to 4.15 mmH2O (the RS120). The RS120 is the pick for static pressure. The MF120 Halo2, the NF-P12 redux and the M25-120 give no static pressure figure, so 2 of 5 picks are compared here.
Features beyond the spec table
The MF120 Halo2: a 0 to 2,050 RPM PWM range. The NF-P12 redux: a rated life above 150,000 hours. The M25-120: a daisy-chain cable between fans.
Where your budget lands
Price does little to separate these 5: the AM-120-K through the M25-120 all landed in the under $50 tier, which leaves top speed to decide it.
How to Choose a CPU Cooler Fan
By priority
| Priority | Consider | Why |
|---|---|---|
| Intake fans in a mesh-front case | AM-120-K | The highest rated airflow here (79.7 CFM) |
| Buyers who want daisy-chain connection from one PWM header | RS120 | A daisy-chain connection from one PWM header |
| Buyers who want an ARGB lighting | MF120 Halo2 | An ARGB lighting |
| Buyers who want pressure-optimised blade design | NF-P12 redux | A pressure-optimised blade design |
| Spending more than the NF-P12 redux costs for the fullest feature set in this group | M25-120 | The top of this price range, adding a 500 to 2,000 RPM PWM range |
Scroll sideways to see every column.
Key specs side by side
The AM-120-K leads on top speed at 2500 RPM, ahead of the RS120 at 2100 RPM. "Not listed" marks rated airflow where the MF120 Halo2, the NF-P12 redux and the M25-120 leave the figure out.
| Case Fan | Fans in box | Max speed | Rated airflow | Static pressure |
|---|---|---|---|---|
| AM-120-K | 1 fan | 2500 RPM | 79.7 CFM | 3.65 mmH2O |
| RS120 | 1 fan | 2100 RPM | 72.8 CFM | 4.15 mmH2O |
| MF120 Halo2 | 1 fan | 2050 RPM | Not listed | Not listed |
| NF-P12 redux | 1 fan | 1700 RPM | Not listed | Not listed |
| M25-120 | 1 fan | 2000 RPM | Not listed | Not listed |
Scroll sideways to see every column.
Frequently Asked Questions
How does the RS120 compare with the AM-120-K on top speed?
Between the top two, it is 2500 RPM on the AM-120-K against 2100 RPM on the RS120, a 19% difference. The NF-P12 redux closes the ranking at 1700 RPM.
Is the AM-120-K ahead of the RS120 on rated airflow?
The AM-120-K tops rated airflow at 79.7 CFM; the RS120 follows at 72.8 CFM, 9% apart. No rated airflow figure is published for the MF120 Halo2, the NF-P12 redux and the M25-120, which leaves 2 of 5 picks ranked here.
Which has the highest static pressure: the RS120 or the AM-120-K?
Between the top two, it is 4.15 mmH2O on the RS120 against 3.65 mmH2O on the AM-120-K, a 14% difference. The MF120 Halo2, the NF-P12 redux and the M25-120 are left out of this ranking because their static pressure isn't stated; 2 of 5 picks are ranked.
Is the M25-120 worth paying more than the AM-120-K?
The M25-120 matches or trails the AM-120-K on top speed. The AM-120-K leads on top speed (2500 RPM). Both sat in the under $50 tier when we checked, so choose on the features you need.
What makes the AM-120-K the Highest Rated Airflow?
It carries the badge for the highest rated airflow here (79.7 CFM). The RS120 is next on rated airflow at 72.8 CFM, so this pick's 79.7 CFM is 9% further out. It is aimed at intake fans in a mesh-front case.
Do the AM-120-K and the RS120 differ on bearing?
The AM-120-K uses Hydraulic; the RS120 uses Magnetic dome. The makers of the MF120 Halo2, the NF-P12 redux and the M25-120 don't state bearing, so 2 of 5 picks are covered here.
Bottom Line
Our first pick is the AM-120-K. Look at the RS120 for a daisy-chain connection from one PWM header, the MF120 Halo2 for an ARGB lighting and the NF-P12 redux for a pressure-optimised blade design if those matter more to you.
Measure the fan's thickness against your cooler's clearance and check whether the cooler's clips take the fan's frame before ordering.