Polar ST5

Performance with exceptional value

Single tower CPU cooler that can handle even the most recent high-end processors. The large copper base optimizes heat transfer for larger CPUs with large and/or multiple dies and comes with 5 sintered powder copper heat pipes to transfer large amounts of heat.





High Quality Materials

  • High quality sintered powder copper heat pipes.

  • Each component is carefully chosen to add as much cooling performance to create CPU coolers with exceptional value.

  • Solid mounting system made of high quality steel.

  • Four heat pipes directly touch the CPU heatspreader.

High performance with wide RPM range

  • High performance M25-120 fan with wide RPM range.

  • Effective design there are no RAM clearance issues.

  • Sleek design that always matches your build.

Performance M25 Fan

  • Comes with the high performing M25 fan.

  • Precise RPM control through PWM with a wide RPM range.

  • Excellent low noise performance.

  • High cooling capacity at 2000 RPM.

Integrated D-RGB lighting

  • 1x 120 mm M25 D-RGB PWM fan included.

  • D-RGB motherboard adapter included to connect it directly to a mainboard.

Asus Auro Sync | RGB Fusion 2.0 | MSI Mystic Light Sync | ASRock Polychrome Sync | Razer Chroma



Model No.


UPC Code





Copper heat-pipes | Aluminum fins | ABS plastics

Intel Compatibility

LGA 115x | 1200 | 1700 | 2011 | 2011-3 | 2066

AMD Compatibility

AM4 | AM5


Length x Width x Height

120 x 50 x 154 mm | 4.72 x 1.96 x 6.06 in


Heatsink Dimension

120 x 50 x 154 mm | 4.72 x 1.96 x 6.06 in

Cold Plate

42 x 39 x 16 mm | 1.65 x 1.53 x 0.62 in

Heat Pipe

Direct Touch 4x Ø 6 mm | Ø 0.23 in

Number of Fins


Thermal Paste

4.3 W/m-k Phanteks high performance thermal paste

Fans 1x Included

Fan Model

M25-120 D-RGB PWM


Length x Width x Height

120 x 120 x 25 mm | 4.72 x 4.72 x 0.98 in


400 ~ 2000 ± 10% RPM

Air Flow

84.26 CFM

Fan Static Pressure

2.67 mm H2O | 0.10 in H2O

Sound Level

35.7 dBA


30.000 Hours

PWM Connector

4-Pin Daisy-chain

PWM Cable Length

120 mm | 4.72 in

D-RGB Connector

3-Pin D-RGB Daisy-chain

D-RGB Cable Length

300 + 100 mm | 11.8 + 3.9 in


Net Weight

766 g | 27.02 oz

Gross Weight

963 g | 33.69 oz


5 Years

Scope of Delivery

1x Polar ST5-120 heatsink
1x M25-120 D-RGB fan


1x Low noise adapter
1x PH-NDC thermal compound
1x Thermal paste spreader
1x Installation guide

Mounting Hardware

1x Intel back plate for LGA115X | 1200 | 1700
4x Fan wire clips
2x Universal socket bracket


4x Stand-off for LGA1200 | AM4 | AM5
4x Stand-off for LGA1700
4x AMD AM4 | AM5 screws
4x Intel LGA115X | 1200 | 1700 screws




What is Digital-RGB?2024-05-30T12:24:53+00:00

Digital-RGB means that each LED chip can be controlled individually, allowing for multiple colors and effects in a single D-RGB LED strip. While regular RGB LED strips can only show the same color on each LED chip per strip at a time. However, not every Digital-RGB (Addressable) product is the same.

Phanteks D-RGB products2024-05-30T12:24:17+00:00

Are plug-and-play. No software is needed, yet it is compatible with software control through MSI or ASUS compatible motherboards if desired. Have custom developed color patterns. We believe D-RGB lighting can be stylish when having the right color/pattern settings, which is why the Phanteks D-RGB controller is pre-installed with custom selected color modes and patterns.

Have 30 LED chips. This is a lot! Having 30 LEDs per product instead of just 8 or 12 creates a much more beautiful color gradient and higher quality lighting. This also means more color tints can be displayed simultaneously in one strip.

Why are Digital-RGB and RGB not compatible?2024-05-30T12:23:51+00:00

Digital-RGB and RGB have a different connector. Digital-RGB uses a 3-pin connector while RGB uses a 4-pin connector. Technical explanation: Digital-RGB uses 5 Volts while RGB uses 12 Volts. Connecting Digital-RGB products and RGB products would cause damage.

Is Digital-RGB compatible with my mainboard?2024-05-30T12:26:57+00:00

Digital-RGB from Phanteks is compatible with Asus Addressable-equipped motherboards and MSI Mystic Light Rainbow-equipped motherboards. Check with the Motherboard specifications if your motherboard has a ‘AURA Addressable Header’ or a ‘Mystic Light Sync Rainbow header’ with 3 pins.

How many D-RGB products can I connect to a compatible mainboard?2024-05-30T12:27:34+00:00

Each D-RGB product uses 1 Ampere. Check the power output with your motherboards specifications to determine how many D-RGB products can be powered by your mainboards. Currently mainboards support 3 Amperes.

How many D-RGB products can I connect to the D-RGB controller from Phanteks?2024-05-30T12:28:14+00:00

The Phanteks D-RGB controller can support up to 7 D-RGB products when using the remote. If the D-RGB controller is connected to your motherboard a total of 9 D-RGB can be connected to the controller. A maximum of 4 D-RGB products can be connected to a single output port on the controller.

How do I connect my D-RGB product from Phanteks to my mainboard?2024-05-30T12:29:05+00:00

Most of the D-RGB products and compatible mainboards include a mainboard adapter. Simply connect this mainboard adapter to the Addressable or Rainbow port on your mainboard and the Phanteks D-RGB products. D-RGB products from Phanteks can be daisy-chained so you only need one port on your motherboard. Most mainboards also include this motherboard adapter cable.

Can I install multiple Digital-RGB controllers in my case?2024-05-30T12:29:44+00:00

You can install as many D-RGB controllers as you would like. However they do not connect to each other. Each controller will work, and need to be controlled, individually.

How do I turn off the D-RGB LED’s on the Phanteks D-RGB controller?2024-05-30T12:31:50+00:00

Press and hold the ‘Mode’ for 2 seconds until the LED’s turn off. When using software control please consult with the motherboard manufacturer.

Can’t find the answer you’re looking for?
Contact us through the SUPPORT button in the bottom right corner of the website.

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2024-06-14T13:05:11+00:00April 18, 2024|Tags: , , , |
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