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All-black single-tower CPU cooler with five copper heat pipes and a 120mm RGB fan

Phanteks

Phanteks PH-TC12ST5_DBK01 CPU cooler

SKU CH-BX4C-6FBF9 MPN PH-TC12ST5_DBK01

Single-tower air cooler with five direct-contact heat pipes and a 120 mm PWM fan rated to 255 W TDP

  • Fan size120 mm
  • Supported CPU socketsAMD Socket AM4 / AMD Socket AM5 / Intel LGA 1150 / Intel LGA
  • Bearing designHydraulic Bearing
  • TDP255 W
  • Rotational speed400 to 2000 +/- 10% RPM
  • Airflow rate84.26 CFM

Model PH-TC12ST5_DBK01

  • Cools up to 255W TDP with five direct-contact heat pipes
  • 120mm M25 fan spins 400–2000 RPM for 84.26 CFM airflow
  • Quiet operation at 35.7dBA thanks to hydraulic bearing
  • Fits AMD AM4/AM5 and Intel LGA 1150–1700 without RAM interference
  • All-black heatsink with top cover plate stays under 154mm height

Polar ST5 identity

The Phanteks Polar ST5 is a single-tower air cooler built around five direct-contact copper heat pipes and a 120 mm D-RGB fan. It targets system builders who want reliable thermal performance with a clean all-black aesthetic.

255 W TDP ceiling

The cooler is rated for a 255 W thermal design power, making that figure the primary gauge of whether it matches your processor's heat output. Hydraulic-bearing fan operation spans 400 to 2000 RPM, delivering 84.26 CFM at 35.7 dBA.

Straightforward mounting

Included brackets cover AMD AM4, AM5 and Intel LGA 1150, 1151, 1155, 1156, 1200 and 1700 sockets, so most mainstream platforms install without extra kits. The 154 mm height fits typical mid-tower cases, while the compact heatsink footprint avoids RAM slot interference. Builders needing more than 255 W dissipation or a dual-fan layout should look elsewhere.

How it compares

Measured against everything we stock in CPU Coolers & Heatsink Fans, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 55% of the 1,559 comparable items (median $19.99).
Fan size 120 mm
Higher than about 80% of the 812 comparable items (median 80 mm).

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Specifications

Product
Brand namePhanteks
Model namePolar ST5
Part numberPH-TC12ST5_DBK01
Product colorBlack
Product typeFan & Heatsinks
Performance
Rotational speed400 to 2000 +/- 10% RPM
Airflow rate84.26 CFM
Static pressure2.67 mm H2O
Processor
TDP255 W
Power
Power input connector4-pin PWM
Size & build
Fan size120 mm
Bearing designHydraulic Bearing
Cooler materialAluminum & Copper
Heatsink dimensions125 × 50 × 154 mm
Product weight1.7 lb (0.77 kg)
Shipping weight0.91 kg
Package size178 × 178 × 127 mm
Compatibility
Supported CPU socketsAMD Socket AM4 / AMD Socket AM5 / Intel LGA 1150 / Intel LGA 1151 / Intel LGA 1155 / Intel LGA 1156 / Intel LGA 1200 / Intel LGA 1700
CPU cooler height limit154 mm
In the box
In the box1 x Polar ST5-120 heatsink
1 x M25-120 D-RGB Fan
1 x Mounting hardware for all listed sockets
1 x Low noise adapter
1 x PH-NDC thermal compound
1 x Thermal paste spreader
1 x Installation guide
1 x Intel back plate (ABS Plastic) for LGA115X/1200/1700
4 x Fan wire clips
2 x Universal socket bracket
4 x stand-off for LGA1200/AM4/AM5
4 x stand-off for LGA1700
4 x AMD AM4/AM5 screws
4 x Intel LGA115X/1200/1700 screws
Environment & compliance
Operating noise35.7 dBA
More details
LED lightingRGB

Other versions of this model

1 more in the same range

Questions about this item

How much heat can the 255 W TDP rating actually handle in a real system?

The 255 W TDP rating indicates the cooler can dissipate up to 255 watts of processor heat under typical workloads when the fan runs at its maximum 2000 RPM.

What does the 4-pin PWM connector limit in practice?

The 4-pin PWM connector allows the motherboard to vary fan speed between 400 and 2000 RPM, capping airflow at 84.26 CFM and noise at 35.7 dBA when full speed is requested.

Will the 154 mm cooler height and 125 mm width fit my case and clear RAM?

The cooler measures 154 mm tall and 125 mm wide; verify your case supports at least 154 mm CPU cooler clearance, while the single-tower design avoids interference with standard-height memory modules.

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