Computer Power Supplies

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SeaSonic Electronics Prime Ultra Titanium Series 1000W 80 Plus Titanium Modular ATX Power Supply

SeaSonic Electronics Prime Ultra Titanium Series 1000W 80 Plus Titanium Modular ATX Power Supply

B&H # SESSR1000TR MFR # SSR-1000TR
Key Features
  • 996W Single +12V Rail
  • 135mm Cooling Fan
  • Intel ATX12V
  • 8 x PCI-E Connectors
$30999
In Stock
SeaSonic Electronics PRIME ULTRA Platinum 1000W 80 Plus Platinum Modular Power Supply

SeaSonic Electronics PRIME ULTRA Platinum 1000W 80 Plus Platinum Modular Power Supply

B&H # SESSR1000PD2 MFR # SSR-1000PD
Key Features
  • 1000W Single +12V Rail
  • 135mm Cooling Fan
  • Intel ATX12V
  • 8 x PCI-E Connectors
$26199
In Stock

NZXT C850 850W 80 PLUS Gold Modular Power Supply

B&H # NZNPC850MUS MFR # NP-C850M-US
Key Features
  • 850W Single +12V Rail
  • 120mm Cooling Fan
  • ATX 12V v2.4 / EPS 12V v2.92
  • 6 x PCIe Connectors
$11999
Reg. $139.99
Save $20.00
In Stock

SeaSonic Electronics FOCUS Plus 750W 80-PLUS Platinum Modular Power Supply

B&H # SESSR750PX MFR # SSR-750PX
Key Features
  • 750W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V Version 2.3
  • 4 x PCI-E Connectors
$15900
In Stock
Other Buying Options

Cooler Master V850 SFX Gold 850W 80 PLUS Gold Modular SFX Power Supply

B&H # COV850SFXG MFR # MPY-8501-SFHAGV-US
Key Features
  • 850W Single +12V Rail
  • 92mm Cooling Fan
  • SFX 12V Version 3.42
  • 6 x PCIe 6+2-Pin Connectors
$14299
Special Order
Expected availability: 7-14 business days

SeaSonic Electronics S12III Series 650W 80 Plus Bronze ATX Power Supply

B&H # SESSR650GB3 MFR # SSR-650GB3
Key Features
  • 650W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V
  • 4 x 8/6-Pin PCIe Connectors
$6900
In Stock

SeaSonic Electronics 1300W 80 Plus Platinum Modular ATX Power Supply

B&H # SESSR1300PD MFR # SSR-1300PD
Key Features
  • 1296W Single +12V Rail
  • 135mm Cooling Fan
  • Intel ATX 12V
  • 12 x PCIe Connectors
$29999
In Stock

be quiet! Straight Power 11 850W 80 Plus Platinum Modular Power Supply

B&H # BESP11P850PS MFR # BN643
Key Features
  • 849.6W Four +12V Rails
  • 135mm Cooling Fan
  • Sleeved Modular Cables
  • ATX 12V v2.51 / EPS 12V v2.92
$17490
In Stock

be quiet! Dark Power 12 1000W 80 PLUS Titanium Modular Power Supply

B&H # BEDP121000 MFR # BN658
Key Features
  • 1000W +12V Rails
  • ATX12V 2.51
  • Fully Modular Cables
  • 8 x 6+2 PCIe Pin Connectors
$27990
In Stock

ASUS Republic of Gamers Thor 1200W 80 Plus Platinum Modular Power Supply

B&H # ASROGTHR12KP MFR # ROG-THOR-1200P
Key Features
  • 1200W +12V Rail
  • 135mm Wing-Blade Cooling Fan
  • Intel ATX12V
  • 8 x 6+2-Pin PCIe Connectors
$31989
In Stock

Cooler Master MasterWatt 750 750W 80 Plus Bronze Semi-Modular Power Supply

B&H # COMPX7501AMA MFR # MPX-7501-AMAAB-US
Key Features
  • 750W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX 12V Version 2.4
  • 4 x PCI-e Connectors
$7999
In Stock

Gigabyte UD850GM 850W 80 PLUS Gold Modular ATX Power Supply

B&H # GIGPUD850GM MFR # GP-UD850GM
Key Features
  • 850W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V Version 2.31
  • 4 x PCIe Connectors
$8999
Reg. $139.99
Save $50.00
In Stock

SeaSonic Electronics FOCUS GM 750W 80 Plus Gold ATX Power Supply

B&H # SEFOCUSGM750 MFR # FOCUS GM-750
Key Features
  • 750W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V
  • 4 x PCIe Connectors
$11799
In Stock

Gigabyte UD1000GM 1000W 80 PLUS Gold Modular ATX Power Supply

B&H # GIGPUD1000GM MFR # GP-UD1000GM
Key Features
  • 1000W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V Version 2.31
  • 6 x PCIe Connectors
$12999
Reg. $159.99
Save $30.00
In Stock

ASUS ROG Strix 1000W 80 PLUS Gold Power Supply

B&H # ASRSTRX1000G MFR # ROG-STRIX-1000G
Key Features
  • 80 Plus Gold Power Rating
  • 1000W Single +12V Rail
  • 1 x 24/20-Pin Mainboard Connector
  • 2 x 4+4-Pin CPU Connectors
$16900
In Stock

Gigabyte AORUS P1200W 1200W 80 PLUS Platinum Modular ATX Power Supply

B&H # GIGPAP1200PM MFR # GP-AP1200PM
Key Features
  • 1200W Single +12V Rail
  • 140mm Cooling Fan
  • Intel ATX12V Version 2.31
  • 10 x PCIe Connectors
$30900
Reg. $369.00
Save $60.00
Temporarily Out of Stock
Expected availability: 2-4 weeks

MSI MPG A650GF 80 PLUS Gold Modular Power Supply

B&H # MSMPGA650GF MFR # MPG A650GF
Key Features
  • One 650W +12V Rail
  • 140mm Cooling Fan
  • Intel ATX12V
  • 4 x PCIe Connectors
$7999
Reg. $109.99
Save $30.00
In Stock

SeaSonic Electronics PRIME ULTRA Platinum 850W 80 Plus Platinum Modular Power Supply

B&H # SESSR850PDV2 MFR # SSR-850PD (V2)
Key Features
  • 850W Single +12V Rail
  • 135mm Cooling Fan
  • Intel ATX12V
  • 6 x PCI-E Connectors
$19499
In Stock

Cooler Master MasterWatt 650 650W 80 Plus Bronze Semi-Modular Power Supply

B&H # COMPX6501AMA MFR # MPX-6501-AMAAB-US
Key Features
  • 650W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX 12V Version 2.4
  • 4 x PCI-e Connectors
$6999
Reg. $84.99
Save $15.00
Limited supply at this price
In Stock

SeaSonic Electronics Focus GX 1000-Watt 80+ Gold Power Supply

B&H # SESR1000FXV2 MFR # SSR-1000FX
Key Features
  • 1000W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V
  • 6 x PCI-E Connectors
$19995
In Stock

SeaSonic Electronics Prime Ultra Gold Series 1000W 80 Plus Gold Modular ATX Power Supply

B&H # SESR1000GDV2 MFR # SSR-1000GD(V2)
Key Features
  • 996W Single +12V Rail
  • 135mm Cooling Fan
  • Intel ATX12V
  • 8 x PCI-E Connectors
$22900
In Stock

be quiet! Dark Power Pro 12 1200W 80 PLUS Titanium Modular Power Supply

B&H # BEBN646 MFR # BN646
Key Features
  • 1200W via Six +12V Rails
  • 135mm Silent Wings Cooling Fan
  • Intel ATX12V Version 2.51
  • 10 x PCIe Connectors
$39999
In Stock

Gigabyte UD1000GM PG5 1000W 80 PLUS Gold Modular ATX Power Supply

B&H # GIGPUD100PG5 MFR # GP-UD1000GM PG5
Key Features
  • 1000W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V Version 3.0
  • 6 x PCIe Connectors
$15999
Reg. $189.99
Save $30.00
In Stock

be quiet! Straight Power 11 1200W 80 Plus Platinum Modular Power Supply

B&H # BESP11P1200P MFR # BN645
Key Features
  • 1200W Four +12V Rails
  • 135mm Cooling Fan
  • Sleeved Modular Cables
  • ATX 12V v2.51 / EPS 12V v2.92
$24394
In Stock

Gigabyte UD750GM 750W 80 PLUS Gold Modular ATX Power Supply

B&H # GIGPUD750GM MFR # GP-UD750GM
Key Features
  • 750W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V Version 2.31
  • 4 x PCIe Connectors
$7999
Reg. $129.99
Save $50.00
In Stock

Thermaltake Toughpower 750W 80 PLUS Gold Modular Power Supply (Black)

B&H # THPSTPD0750M MFR # PS-TPD-0750MPCGUS-1
Key Features
  • 750W Maximum Output Capacity
  • 80 PLUS Gold Certified and Haswell Ready
  • 12 x 5-Pin SATA Connectors
  • 4 x PCIe (6 + 2-Pin) Connectors
$9699
In Stock

SeaSonic Electronics Focus Gold Series 550W 80 Plus Gold Semi-Modular ATX Power Supply

B&H # SESSR550FM MFR # SSR-550FM
Key Features
  • 550W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V
  • 2 x PCI-E Connectors
$9999
In Stock

NZXT C750 750W 80 PLUS Gold Modular Power Supply

B&H # NZNPC750MUS MFR # NP-C750M-US
Key Features
  • 750W Single +12V Rail
  • 120mm Cooling Fan
  • ATX 12V v2.4 / EPS 12V v2.92
  • 4 x PCIe Connectors
$9999
Reg. $129.99
Save $30.00
In Stock

MSI MPG A850GF 80 PLUS Gold Modular Power Supply

B&H # MSMPGA850GF MFR # MPG A850GF
Key Features
  • One 850W +12V Rail
  • 140mm Cooling Fan
  • Intel ATX12V
  • 6 x PCIe Connectors
$12499
Reg. $139.99
Save $15.00
In Stock
Other Buying Options

SeaSonic Electronics FOCUS Plus 550W 80-PLUS Platinum Modular Power Supply

B&H # SESSR550PX MFR # SSR-550PX
Key Features
  • 550W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V Version 2.3
  • 2 x PCI-E Connectors
$12999
In Stock

YOUR RECENTLY VIEWED ITEMS

Choosing Computer Power Supplies

Power supplies are essential components for many desktop computer systems. They sit inside the computer chassis and feature the socket that a power cord connects to. Choosing the right power supply is especially important for gamers and others who may be custom building PCs, since their choice determines if all their machines' components are able to run efficiently.

 

Choosing and Installing a Desktop PC Power Supply

Computer power supplies from brands such as EVGA and Corsair are ranked by efficiency in categories ranging from Bronze to Titanium. This creates a selection of products at different price points, to meet varying power needs. Choose a wattage that meets or exceeds the total watts used by all of your system's components, such as hard drives and graphics cards. Most computers won't need more than 750W, while large, more component-intensive systems require 1000W or 1200W power supplies.

When installing a power supply inside a computer case, it's important to make sure it doesn't restrict airflow so the inner workings remain cooled down. The power supply also has its own cooling fan, which runs with minimal noise. For laptop-based workstations, there are external breakaway box power supplies and expansion chassis that may provide additional PCIe slots.


What Makes a Power Supply Modular

You may see some power supply models described as modular, which means that their internal power cables are detachable from the supply, for a more customized installation. This is especially useful for gaming PC builds, because it lets you attach only the cables you need to the components inside the system, creating more room for airflow. In non-modular power supplies, the cables are permanently attached.


How Server Power Supplies Work

Servers need their own type of power supply for their unique requirements. They feature a different form factor to fit inside rack-mounted servers, and feature redundancies to help prevent any downtime, allowing servers to run continuously. Some server power supplies also offer switches so you can turn off the supply and the server with a switch rather than by removing the power cord.


Whether you're building your own personal PC or running a busy enterprise, B&H Photo and Video has the power supply gear you need to keep them running efficiently.