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

SAMA

SAMA B850BK 850W ATX 3.1 power supply

SKU CH-B51V-4B9P0 MPN B850BK

Delivers 850W via ATX 3.1 with a PCIe 5.1 12V-2x6 connector for 450W GPU power, Cybenetics Bronze efficiency, APFC + LLC + DC-DC topology and a 120mm FDB fan in a non-modular design

  • TypeATX3.1
  • Maximum Power850 W
  • SLIReady
  • CrossFireReady
  • ModularNo
  • Fans120mm FDB Fan (Fluid Dynamic Bearing)

Certification Series Bronze B Series

Wattage 850W

Color Black

  • ATX 3.1 and PCIe 5.1 ready for next-gen GPUs
  • 12V-2x6 connector delivers up to 450W to modern graphics cards
  • Cybenetics Bronze certified for over 90% efficiency at typical 50% load
  • APFC + LLC + DC-DC topology provides stable voltage regulation under load
  • Full protection suite including OVP, UVP, OCP, OPP, OTP and SCP safeguards components

ATX 3.1 Power Supply for Modern Builds

The SAMA B850BK is an 850W ATX 3.1 power supply built for modern gaming systems and PC builds. It provides reliable and stable power delivery for demanding components. The non-modular design includes all essential cables fixed to the unit.

PCIe 5.1 12V-2x6 Connector Limits

This unit includes a PCIe 5.1 ready 12V-2x6 connector delivering up to 450W for next-generation graphics cards. The main ATX 24Pin cable reaches 550mm for standard routing. Six SATA power connectors support multiple storage drives.

Cybenetics Bronze Efficiency Rating

Certified by Cybenetics Bronze, the PSU achieves over 90% efficiency at typical 50% load. The APFC + LLC + DC-DC topology ensures stable voltage regulation across workloads. Full protection circuits include OVP, UVP, OCP, OPP, OTP and SCP.

I korthet

  • ATX 3.1 and PCIe 5.1 ready for next-gen GPUs
  • 12V-2x6 connector delivers up to 450W to modern graphics cards
  • Cybenetics Bronze certified for over 90% efficiency at typical 50% load
  • APFC + LLC + DC-DC topology provides stable voltage regulation under load
  • Full protection suite including OVP, UVP, OCP, OPP, OTP and SCP safeguards components

Specifikationer

BrandSAMA
ModelB850BK
SeriesB850
Part NumberB0850-BKBFWA31-US
TypeATX3.1
Maximum Power850 W
SLIReady
CrossFireReady
ModularNo
Fans120mm FDB Fan (Fluid Dynamic Bearing)
PFCActive
Main Connector1x ATX 24Pin 550mm
+12V RailsSingle
SATA Power Connector6x
Hold-up Time> 12 ms @ 100% load
Efficiency'>90% @ Typical Load (50% Load)
PSU Noise Leveltba
Over Voltage ProtectionYes
Overload ProtectionYes
Input Voltage100 - 240 V
Input Frequency Range50-60 Hz
Input Current10A
Output850W
MTBF100,000 Hours
Connectors1x ATX 24Pin, 2x CPU 4+4Pin, 3x PCI-E 6+2Pin, 6x SATA, 2x Molex
ColorBlack
Haswell SupportYes
Max PSU Length140mm
ProtectionUVP / OVP / OCP / OPP / OTP / NLP / SCP
Cable Spec1x MB ATX 24Pin 550mm
2x CPU (4+4)Pin 700mm
1x PCI-E (6+2)Pin 600mm
1x PCI-E (6+2)Pin+(6+2)Pin 550+150mm
1x 12V-2x6 (12+4)Pin 600mm
2x (SATA+SATA+SATA+Molex) 450+150+150+150mm
Power Rating850W
Energy-Efficient80 PLUS BRONZE Certified
ApprovalsCB / CE / TUV / cTUVus / FCC / ICES / UKCA / EAC
Size/Dimensions140 x 150 x 86mm
Dimensions140 x 150 x 86mm
Weight1.46kg
Package ContentB850+Cable +accessory+Quick Start Guide
Frequency Range50/60 Hz
+3.3V Max. Current15A
+5V Max. Current15A
+12V1 Max. Current70.8A
-12V Max. Current0.4A
+5VSB Max. Current2.5A
Fans Total Quantity1
Top Fans Size120mm
Over Load ProtectionYes
Short Circuit ProtectionYes
Under Voltage ProtectionYes
Over Current ProtectionYes
Over Power ProtectionYes
Over Temperature ProtectionYes

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Frågor om den här produkten

Should I choose this 850W model or a lower-wattage unit for a GPU that needs the 12V-2x6 connector?

The 12V-2x6 connector on this unit is rated for up to 450W, so the 850W capacity leaves headroom for the rest of the system.

What does the 850W rating mean when the 12V-2x6 port can deliver 450W?

The 850W is the total continuous output across all rails; the 450W figure is the maximum the single 12V-2x6 connector can supply to a graphics card.

Does the ATX 3.1 and PCIe 5.1 readiness limit the power I can draw through the 12V-2x6 cable?

The 12V-2x6 connector included with this ATX 3.1 unit is specified for up to 450W, which is the practical ceiling for that cable.

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