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Rectangular ATX power supply unit in matte black finish with modular cable sockets and a 135mm fan grille

Seasonic

Seasonic PRIME TX-850 850W 80+ Titanium ATX power supply

SKU CH-TG33-NJC8G MPN PRIME TX-850

An 850 W ATX power supply with 80 Plus Titanium efficiency, full modular cables and a 135 mm fluid-dynamic-bearing fan rated for 50,000 hours

  • TypeATX12V / EPS12V
  • Maximum Power850 W
  • Fans135mm Fluid Dynamic Bearing Fan w/ Hybrid Fan Control Fan Co
  • PFCActive
  • Main Connector20+4Pin
  • +12V RailsSingle

Options ATX Titanium (850W)

  • 850 W Titanium efficiency cuts electricity waste with 94 % at 50 % load
  • Fanless mode option via S3FC switch keeps noise at Cybenetics A++ level
  • Single +12 V rail delivers 70 A with under .5 % load regulation
  • Full modular cabling includes 6 PCIe and 10 SATA connectors for clean builds
  • 12 year warranty backed by 150000 hour MTBF and Japanese capacitors

850W Titanium ATX power supply

The Seasonic PRIME TX-850 is an ATX12V/EPS12V unit rated for 850 W continuous output. It carries 80 PLUS Titanium certification with 94 % efficiency at 50 % load. A single +12 V rail delivers 70 A for stable GPU and CPU power. The 170 mm depth fits standard ATX cases.

Full modular cabling and hybrid fan control

Every cable detaches so only required leads stay in the chassis, reducing clutter and improving airflow. Six 6+2-pin PCIe connectors and ten SATA power plugs cover multi-GPU and storage arrays. The 135 mm fluid-dynamic-bearing fan runs in a selectable fanless mode below low-load thresholds, then ramps under Premium Hybrid Fan Control for Cybenetics A++ acoustics.

Check clearance and connector needs before ordering

Verify the 170 mm length clears drive cages and cable routing space in your case. Confirm the motherboard accepts a 20+4-pin main connector and an EPS12V CPU plug. Ensure the six PCIe 6+2-pin leads match your graphics card requirements and that ten SATA connectors suffice for drives. The unit operates on 100-240 V mains at 50/60 Hz.

Points forts

  • 850 W Titanium efficiency cuts electricity waste with 94 % at 50 % load
  • Fanless mode option via S3FC switch keeps noise at Cybenetics A++ level
  • Single +12 V rail delivers 70 A with under .5 % load regulation
  • Full modular cabling includes 6 PCIe and 10 SATA connectors for clean builds
  • 12 year warranty backed by 150000 hour MTBF and Japanese capacitors

Caractéristiques

BrandSeaSonic
SeriesPRIME Ultra Titanium
ModelPRIME TX-850 (SSR-850TR)
TypeATX12V / EPS12V
Maximum Power850 W
Fans135mm Fluid Dynamic Bearing Fan w/ Hybrid Fan Control
Fan Control: Premium Hybrid Fan Control
Fan Bearing: Fluid Dynamic Bearing
Life Expectancy: 50,000 hours at 40 degree centigrade, 15% - 65% RH
PFCActive
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector6 x 6+2-Pin
SATA Power Connector10
Max PSU Length170 mm
ModularFull Modular
Efficiency94 % efficiency at 50 % system load
Energy-Efficient80 PLUS TITANIUM Certified
PSU Noise LevelCybenetics A++
Over Voltage ProtectionYes
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current11 - 5.5 A
Output+3.3V@20A, +5V@20A, +12V@70A, [email protected] , [email protected]
MTBF150,000 Hours MTBF at 25 degree centigrade, excl. fan: 150,000 hours
ApprovalsSafety and EMC: cTUVus, TUV, CB, CCC, BSMI, EAC
Environmental Compliance: Energy Star, RoHS, WEEE, ErP Lot 6, REACH
Connectors1 x Main Power 24/20 pins
2 x CPU 4/8 Pin
6 x PCI-E 6/8 Pin
10 x SATA
5 x Peripheral
1 x FDD
Features80 PLUS Titanium
Fluid Dyanamic Fan Bearing
Premium Hybrid Fan Control
Micro Tolerance Load Regulation
Extended Hold-up Time (30 ms)
Super Low Ripple Noise (20 mV)
Cable-free Connection Design
Cable type: Flat black cables
Operating Temperature: 0 - 50 degree centigrade
Dimensions3.39" x 5.91" x 6.70"
Weight9.20 lbs.
Poids d’expédition3.88 kg
Dimensions du colis338 × 208 × 137 mm

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Questions sur cet article

How long is the fan rated to last before it needs replacement?

The 135mm Fluid Dynamic Bearing fan has a life expectancy of 50,000 hours at 40 degrees Celsius and 15% to 65% relative humidity.

What is the first limit reached under sustained heavy load?

The single +12V rail is rated for a maximum of 70A, which is the primary current limit before protection circuits engage.

How loud does the unit get when running continuously all day?

It holds a Cybenetics A++ noise rating and the Premium Hybrid Fan Control offers a fanless mode below a certain load threshold for silent operation.

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