Computer Power Supplies
MSI MPG A1000G 1000W 80 PLUS Gold ATX Modular Power Supply
- 1000W Rated Wattage
- 80 PLUS Gold Rating
- 135mm Fluid Dynamic Bearing Fan
- 0 RPM Fan Mode
SeaSonic Electronics FOCUS Plus 850W 80-PLUS Platinum Modular Power Supply
- 850W Single +12V Rail
- 120mm Cooling Fan
- Intel ATX12V Version 2.3
- 6 x PCI-E Connectors
be quiet! Straight Power 11 1000W 80 Plus Platinum Modular Power Supply
- 999.6W Four +12V Rails
- 135mm Cooling Fan
- Sleeved Modular Cables
- ATX 12V v2.51 / EPS 12V v2.92
SeaSonic Electronics FOCUS 850W 80 PLUS Gold ATX 12V Power Supply
- 850W Single +12V Rail
- Intel ATX 12V Form Factor
- 6 x PCI-E Connectors
- 10 x SATA Connectors
Other Buying Options
Cooler Master MasterWatt 650 650W 80 Plus Bronze Semi-Modular Power Supply
- 650W Single +12V Rail
- 120mm Cooling Fan
- Intel ATX 12V Version 2.4
- 4 x PCI-e Connectors
SeaSonic Electronics S12III Series 650W 80 Plus Bronze ATX Power Supply
- 650W Single +12V Rail
- 120mm Cooling Fan
- Intel ATX12V
- 4 x 8/6-Pin PCIe Connectors
SeaSonic Electronics Focus Gold Series 550W 80 Plus Gold Semi-Modular ATX Power Supply
- 550W Single +12V Rail
- 120mm Cooling Fan
- Intel ATX12V
- 2 x PCI-E Connectors
Other Buying Options
MSI MPG A650GF 80 PLUS Gold Modular Power Supply
- One 650W +12V Rail
- 140mm Cooling Fan
- Intel ATX12V
- 4 x PCIe Connectors
Corsair RM650 650W 80 PLUS Gold Modular Power Supply (Black)
- 650W Single +12V
- 140mm Cooling Fan
- Intel ATX12V Version 2.4
- 2 x CPU Connectors
SeaSonic Electronics FOCUS 650W 80 PLUS Gold ATX 12V Power Supply
- 650W Single +12V Rail
- Intel ATX 12V Form Factor
- 4 x PCI-E Connectors
- 8 x SATA Connectors
Other Buying Options
MSI 850W MPG A850G PCIE5 Power Supply
- 850W Peak Performance
- Dedicated PCIe 5.0 Connector
- Fully Modular Design
- 80 PLUS Gold Efficiency Rating
ASUS Republic of Gamers STRIX 650W 80 Plus Gold Modular ATX Power Supply
- 650W Single +12V Rail
- 135mm Cooling Fan
- 4 x 6+2-Pin PCIe Connectors
- 8 x SATA Connectors
SeaSonic Electronics FOCUS 750W 80 PLUS Gold ATX 12V Power Supply
- 750W Single +12V Rail
- Intel ATX 12V Form Factor
- 4 x PCI-E Connectors
- 8 x SATA Connectors
be quiet! Dark Power Pro 12 1200W 80 PLUS Titanium Modular Power Supply
- 1200W via Six +12V Rails
- 135mm Silent Wings Cooling Fan
- Intel ATX12V Version 2.51
- 10 x PCIe Connectors
Other Buying Options
SeaSonic Electronics FOCUS Plus 750W 80-PLUS Platinum Modular Power Supply
- 750W Single +12V Rail
- 120mm Cooling Fan
- Intel ATX12V Version 2.3
- 4 x PCI-E Connectors
Lian Li 850W SP850 80+ Gold SFX Modular Power Supply (Black)
- SFX Form Factor
- 850W Total Power
- 80+ Gold Certified
- Fully Modular Braided Cable Design
Corsair 1000W HX Series HX1000 80 PLUS Platinum Modular Power Supply
- 1000W of Power
- 80 PLUS Platinum Efficiency Rating
- 1 x Mainboard 20+4-Pin Connector
- 2 x 4+4-Pin Connectors
be quiet! Straight Power 11 550W 80 Plus Platinum Modular Power Supply
- 549.6W Four +12V Rails
- 135mm Cooling Fan
- Sleeved Modular Cables
- ATX 12V v2.51 / EPS 12V v2.92
SeaSonic Electronics Prime Ultra Titanium Series 850W 80 Plus Titanium Modular ATX Power Supply
- 840W Single +12V Rail
- 135mm Cooling Fan
- Intel ATX12V
- 6 x PCI-E Connectors
be quiet! Pure Power 11 FM 850W Power Supply
- 850W Dual +12 Rails
- Fully Modular Design
- Intel ATX 12V Version 2.5
- 4 x PCIe Connectors
MSI MPG A850GF 80 PLUS Gold Modular Power Supply
- One 850W +12V Rail
- 140mm Cooling Fan
- Intel ATX12V
- 6 x PCIe Connectors
SeaSonic Electronics Focus GX 1000-Watt 80+ Gold Power Supply
- 1000W Single +12V Rail
- 120mm Cooling Fan
- Intel ATX12V
- 6 x PCI-E Connectors
NZXT C750 750W 80 PLUS Bronze Semi-Modular ATX Power Supply
- 750W Single +12V Rail
- 120mm Cooling Fan
- ATX 12V v2.4 / EPS 12V v2.92
- 6 x PCIe Connectors
ASUS ROG Thor 1000W EVA Gaming 80 Plus Platinum Modular Power Supply
- 1000W Single +12V Rail
- 135mm PWM Cooling Fan
- Intel ATX 12V Specification
- 8 x PCIe Connectors
NZXT C Series 1000W 80 Plus Gold V2 Full-Modular ATX Power Supply
- 1000W Single +12V Rail
- 135mm Cooling Fan
- ATX 12V v2.4 / EPS 12V v2.92
- 6 x PCIe Connectors
be quiet! Straight Power 11 650W 80 Plus Platinum Modular Power Supply
- 649.2W Four +12V Rails
- 135mm Cooling Fan
- Sleeved Modular Cables
- ATX 12V v2.51 / EPS 12V v2.92
Thermaltake Smart 430W 80 Plus Power Supply
- 384W Single +12V Rail
- 120mm Fan with Intelligent RPM Controls
- Intel ATX12V Version 2.3
- 2 x PCI-E Connectors
Cooler Master MWE 450 WHITE - V2 450W 80 Plus Standard ATX Power Supply
- 450W Single +12V Rail
- 120mm Cooling Fan
- 2 x 6+2-Pin PCIe Connectors
- 6 x SATA Connectors
Thermaltake Smart 700W 80 PLUS Power Supply
- 700W Single +12V Rail
- 120mm Cooling Fan
- Intel ATX12V Version 2.3
- 2 x PCIe Connectors
be quiet! Pure Power 11 700W Power Supply
- 700W Dual +12 Rails
- Non-Modular Design
- Intel ATX 12V Version 2.4
- 4 x PCIe Connectors
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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.