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Black fanless 120W DC-DC power board with external 12V adapter and sleeved cables

Silverstone

Silverstone AD120-DC 120W Fanless Power Supply

SKU CH-EK20-RH89N MPN AD120-DC

Fanless 120 W DC-DC kit with 12 V adapter, 24-pin, 8-pin EPS, three SATA and one peripheral connector

  • Max wattage120 W
  • Fan configurationFanless
  • Output type10A
  • Connection types1 × 24 pin ATX / 1 × 4 pin Peripheral / 1 × 8 pin (4+4) EPS
  • Cable details1 × 24-Pin motherboard connector (200 mm) 1 × 8 / 4-Pin EPS
  • Product colorBlack
  • Silent operation with fanless 120 W design
  • Compact DC board fits 160 mm wide spaces
  • External 12 V 10 A adapter keeps heat outside case
  • Full ATX connector set includes EPS and three SATA
  • Black sleeved cables simplify clean cable routing

Compact Fanless Power Kit

The Silverstone AD120-DC delivers 120 W through a fanless DC-DC board paired with a 12 V 10 A AC-DC adapter. It targets builders of compact systems such as the Milo 10 chassis who need silent operation and a minimal footprint. The black-wire loom includes a 24-pin ATX connector, an 8-pin EPS connector, three SATA connectors and one 4-pin peripheral connector.

Upgrade From Flex ATX Units

This kit replaces bulkier flex-ATX or low-profile internal supplies where space and noise are primary constraints. The jump is worthwhile when the total system draw stays within the 120 W limit and the chassis can accommodate the external adapter brick. Builds requiring higher wattage or additional PCIe power connectors cannot use this solution.

Limits of 12 V DC Input

The DC-DC board accepts a single 12 V input rated at 10 A, capping combined output at 120 W across all rails. Cable lengths are fixed at 200 mm for the 24-pin and peripheral leads, 250 mm for the EPS lead, and 300 mm plus two 100 mm branches for the three SATA connectors. The board measures 160 mm by 45 mm by 25 mm, while the adapter measures 168 mm by 71 mm by 37.5 mm.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $78.99
Cheaper than about 76% of the 10,869 comparable items (median $142.99).
Max wattage 120 W
Lower than about 99% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSilverStone
Model nameAD120-DC
Product colorBlack
Ports & slots
Output type10A
Connection types1 × 24 pin ATX / 1 × 4 pin Peripheral / 1 × 8 pin (4+4) EPS (CPU) / 3 x SATA
Power
Max wattage120 W
Size & build
Product dimensionsDC board dimension: 160 mm (W) × 25 mm (H) × 45 mm (D)
Dimension: 168 mm (W) × 71 mm (H) × 37.5 mm (D)
Shipping weight1.36 kg
Package size178 × 76 × 51 mm
More details
Fan configurationFanless

Questions about this item

What clearance does the 160 mm wide DC board need inside the case?

The DC board measures 160 mm wide by 45 mm deep by 25 mm high, so allow at least that footprint plus cable bend radius behind the motherboard tray.

Which connector must be seated first to avoid bending the 24-pin cable?

Route the 200 mm 24-pin ATX cable to the motherboard before plugging the 250 mm 4+4-pin EPS and 300 mm SATA leads, otherwise the stiff 24-pin harness can kink.

When should the external 120 W 12 V/10 A AC-DC adapter be replaced?

Replace the adapter if output voltage drifts below 12 V under load or if the unit becomes audibly noisy, as the fanless DC board relies entirely on clean adapter power.

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