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
$29999
In Stock
SeaSonic Electronics FOCUS Plus 750W 80-PLUS Platinum Modular Power Supply

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

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
$23499
In Stock

Gigabyte GP-P650B 650W 80 PLUS Bronze Power Supply

B&H # GIGPP650B MFR # GP-P650B
Key Features
  • 650W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX 12V v2.31 Form Factor
  • 4 x PCIe Connectors
$6699
In Stock

SeaSonic Electronics FOCUS Plus 850W 80-PLUS Platinum Modular Power Supply

B&H # SESSR850PX MFR # SSR-850PX
Key Features
  • 850W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V Version 2.3
  • 6 x PCI-E Connectors
$16999
In Stock
Other Buying Options

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

SeaSonic Electronics FOCUS 650W 80 PLUS Gold ATX 12V Power Supply

B&H # SESSR650FX MFR # SSR-650FX
Key Features
  • 650W Single +12V Rail
  • Intel ATX 12V Form Factor
  • 4 x PCI-E Connectors
  • 8 x SATA Connectors
$11999
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

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
In Stock

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

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

SeaSonic Electronics FOCUS 750W 80 PLUS Gold ATX 12V Power Supply

B&H # SESSR750FX MFR # SSR-750FX
Key Features
  • 750W Single +12V Rail
  • Intel ATX 12V Form Factor
  • 4 x PCI-E Connectors
  • 8 x SATA Connectors
$13900
Special Order
Expected availability: 3-7 business days

be quiet! Pure Power 11 FM 1000W Power Supply

B&H # BEPP11FM1000 MFR # BN676
Key Features
  • 1000W Dual +12 Rails
  • Fully Modular Design
  • Intel ATX 12V Version 2.5
  • 4 x PCIe Connectors
$15990
In Stock

SeaSonic Electronics Prime Ultra Titanium Series 750W 80 Plus Titanium Modular ATX Power Supply

B&H # SESSR750TR MFR # SSR-750TR
Key Features
  • 744W Single +12V Rail
  • 135mm Cooling Fan
  • Intel ATX12V
  • 4 x PCI-E Connectors
$20999
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
$11999
In Stock

SeaSonic Electronics Prime Ultra Titanium Series 850W 80 Plus Titanium Modular ATX Power Supply

B&H # SESSR850TR MFR # SSR-850TR
Key Features
  • 840W Single +12V Rail
  • 135mm Cooling Fan
  • Intel ATX12V
  • 6 x PCI-E Connectors
$24999
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

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
$7299
Reg. $84.99
Save $12.00
Limited supply at this price
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
$11999
In Stock

SeaSonic Electronics Focus Gold Series 750W 80 Plus Gold Semi-Modular ATX Power Supply

B&H # SESSR750FM MFR # SSR-750FM
Key Features
  • 750W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V
  • 4 x PCI-E Connectors
$11999
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
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
$12999
In Stock

SeaSonic Electronics FOCUS 850W 80 PLUS Gold ATX 12V Power Supply

B&H # SESSR850FX MFR # SSR-850FX
Key Features
  • 850W Single +12V Rail
  • Intel ATX 12V Form Factor
  • 6 x PCI-E Connectors
  • 10 x SATA Connectors
$15799
In Stock

ASUS Republic of Gamers Thor 850W 80 Plus Platinum Modular Power Supply

B&H # ASROGTHR850P MFR # ROG-THOR-850P
Key Features
  • 850W +12V Rail
  • 135mm Wing-Blade Cooling Fan
  • Intel ATX12V
  • 4 x 6+2-Pin PCIe Connectors
$16999
In Stock

SeaSonic Electronics S12III Series 550W 80 Plus Bronze ATX Power Supply

B&H # SESSR550GB3 MFR # SSR-550GB3
Key Features
  • 550W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V
  • 2 x 8/6-Pin PCIe Connectors
$6999
In Stock
$9999
In Stock
Other Buying Options

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
$12236
In Stock
Other Buying Options

SeaSonic Electronics FOCUS GM 850W 80 Plus Gold ATX Power Supply

B&H # SEFOCUSGM850 MFR # FOCUS GM-850
Key Features
  • 850W Single +12V Rail
  • 120mm Cooling Fan
  • Intel ATX12V
  • 6 x PCIe Connectors
$14999
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
In Stock

SeaSonic Electronics Prime Ultra Gold Series 750W 80 Plus Gold Modular ATX Power Supply

B&H # SESSR750GD2 MFR # SSR-750GD2
Key Features
  • 744W Single +12V Rail
  • 135mm Cooling Fan
  • Intel ATX 12 V
  • 4x PCI-E Connectors
$16199
In Stock
Other Buying Options

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.