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Black rectangular ATX power supply with fixed cables and a 120mm fan grille

SAMA

SAMA B650BK 650W ATX 3.1 power supply

SKU CH-GTWS-ZQ477 MPN B650BK

Delivers 650 W through an ATX 3.1 design with a 12V-2x6 connector rated for 450 W, Cybenetics Bronze efficiency, APFC LLC DC-DC topology and a 120 mm fluid-dynamic-bearing fan

  • Max wattage650 W
  • Power efficiency>85% @ Typical Load (50% Load)
  • Modular cablingNo
  • SLI supportReady
  • CrossFire supportReady
  • Fan configuration120 mm FDB Fan (Fluid Dynamic Bearing)

Certification Series Bronze B Series

Wattage 650W

Color Black

  • ATX 3.1 ready with 12V-2x6 connector delivering up to 450W
  • Cybenetics Bronze certified efficiency above 85% at typical load
  • APFC LLC plus DC-DC topology for stable voltage regulation
  • Full protection suite including OVP UVP OCP OPP OTP SCP
  • 120mm fluid dynamic bearing fan for quiet cooling

ATX 3.1 650 W power supply

The SAMA B650BK is a non-modular ATX 3.1 unit rated at 650 W. It targets PC builders who need a current-generation connector set without removable cables. A single +12 V rail and 100–240 V input suit mainstream gaming and workstation systems.

Sustained-load behaviour

Active PFC with half-bridge LLC and DC-DC stages keeps voltage regulation steady during extended gaming sessions. Hold-up time exceeds 12 ms at full load, so brief mains interruptions do not crash the system. Cybenetics Bronze and 80 PLUS Bronze ratings confirm efficiency above 85 % at typical 50 % load.

12V-2x6 connector for new GPUs

A native 12V-2x6 (12+4) cable delivers up to 450 W to PCIe 5.1 graphics cards. Three additional 8-pin (6+2) PCIe connectors and six SATA power plugs cover remaining components. All protection circuits — OVP, UVP, OCP, OPP, OTP, SCP — are present.

How it compares

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

Price $35.99
Cheaper than about 93% of the 10,869 comparable items (median $142.99).
Max wattage 650 W
Lower than about 70% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSAMA
Product lineB650
Model nameB650BK
Product typeATX3.1
Product colorBlack
Performance
Frequency50-60 Hz
Graphics
SLI supportReady
CrossFire supportReady
Ports & slots
PCIe power connectors3x 8Pin (6+2)
SATA power connectors6
Output type650 W
Peripheral connector2x Molex
Power
Max wattage650 W
Power efficiency>85% @ Typical Load (50% Load)
Modular cablingNo
Power factor correctionActive
12V railsSingle
Power hold-up time> 12 ms @ 100% load
Efficiency certification80 PLUS BRONZE Certified
Overvoltage protectionYes
Overload protectionYes
Supply voltage100–240 V
AC input frequency50-60 Hz
Rated input current10A
Built-in protectionUVP / OVP / OCP / OPP / OTP / NLP / SCP
Rated power650 W
+3.3V max. current15A
+5V max. current15A
+12V1 max. current54.1A
+12V2 max. current15A
-12V max. current0.4A
+5VSB max. current2.5A
Main power connector1x ATX 24Pin 550 mm
Under voltage protectionYes
Over current protectionYes
Over power protectionYes
Size & build
Product dimensions140 × 150 × 86 mm
Product weight1.4kg
Top fans size120 mm
Compatibility
Haswell compatibilityYes
PSU length limit140 mm
In the box
Included itemsB650+Cable +accessory+Quick Start Guide
Fans total quantity1
Environment & compliance
PSU noise ratingTba
Over temperature protectionYes
More details
Fan configuration120 mm FDB Fan (Fluid Dynamic Bearing)
Mean time between failures100,000 h
Over load protectionYes
Short circuit protectionYes

Other versions of this model

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Questions about this item

Will the 12V-2x6 connector deliver enough power for a modern graphics card?

The 12V-2x6 connector is rated for up to 450W, which covers the requirements of current PCIe 5.1 graphics cards.

Does the non-modular design mean I must route every cable inside my case?

All cables are fixed, including the 24-pin ATX, two CPU 4+4-pin, three PCIe 6+2-pin, one 12V-2x6 and two SATA/Molex chains, so you will manage the full set.

Is the unit compatible with a standard ATX case and motherboard?

The PSU measures 140mm deep, 150mm wide and 86mm high, matching the ATX form factor, and the 24-pin plus CPU cables reach 550mm and 700mm respectively for typical layouts.

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