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PSU For Jizhimao ATX 80plus Gold Silent 850W Switching Power Supply XT850
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  • $888.03 
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PSU For Jizhimao ATX 80plus Gold Silent 850W Switching Power Supply XT850
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  • $888.03 
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250W Power Supply for Dell 7GC81 Optiplex
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  • $42.48 
  • $39.99 Shipping
HP 305447-001 325W AC Power Supply
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  • $74.16 
  • $39.99 Shipping
HP 437331-001 Proprietary Power Supply
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  • $17.99 
  • $39.99 Shipping
IBM 49P2742 200W AC Power Supply
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  • $67.93 
  • $39.99 Shipping
PSU For FSP 600W Switching Power Supply FSP600-80PSA FSP600-80PSA(SK ) SPI600A8BB
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  • $1,235.79 
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HP 381025-001 AC Power Supply
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  • $47.52 
  • $39.99 Shipping
HP 437406-001 Proprietary Power Supply
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  • $39.60 
  • $39.99 Shipping
Dell Mx838  488 Watt Power Supply For Powervault Md3000
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  • $44.33 
  • $39.99 Shipping
HPE 408286-001 AC Power Supply
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  • $82.80 
  • $39.99 Shipping
10pcs D880 TO220 Transistor KSD880Y NPN Silicone Power Transistors 3A 60V
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  • $28.49 
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PSU For IEI ATX 300W Switching Power Supply ACE-A130-R11 ACE-A130B-S-R11
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  • $906.66 
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PSU For IEI ATX 300W Switching Power Supply ACE-A130B-R10 ACE-A130B
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  • $1,235.79 
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PSU For FSP 80plus Bronze 650W Switching Power Supply FSP650-80GHN FSP650-80GHN(85)
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  • $1,124.01 
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PSU For FSP 80plus Bronze 650W Switching Power Supply FSP650-80GHN FSP650-80GHN(85)
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  • $1,124.01 
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PSU For FSP 600W Switching Power Supply FSP600-80PSA FSP600-80PSA(SK ) SPI600A8BB
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  • $1,235.79 
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271352-002 HP Power Supply - 250 Watt Non Pfc
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  • $64.64 
  • $39.99 Shipping
Compaq 163555-001 Power Supply 90W Atx Ipaq
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  • $46.80 
  • $39.99 Shipping
PSU For IEI ATX 300W Switching Power Supply ACE-A130B-R10 ACE-A130B
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  • $1,235.79 
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PSU For IEI ATX 300W Switching Power Supply ACE-A130-R11 ACE-A130B-S-R11
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  • $906.66 
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PSU For 3Y DC 650W Switching Power Supply YM-2651J PSR650B-12D1
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  • $1,114.70 
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PSU For IEI AT P8P9 200W Switching Power Supply ACE-916AP ACE-916A
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  • $900.45 
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PSU For IEI 300W Switching Power Supply ACE-832AP ACE-832AP-RS Replace ACE-A130B 832A
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  • $1,080.54 
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PSU For EMC 710G 1450W Switching Power Supply SGB001 071-000-580-05 071-000-580-04 ACPD3134800365
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  • $1,117.80 
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PSU For EMC 710G 1450W Switching Power Supply SGB001 071-000-580-05 071-000-580-04 ACPD3134800365
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  • $1,117.80 
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124892-001 Compaq Power Supply 200 Watt Atx
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  • $33.12 
  • $39.99 Shipping
PSU For 3Y DC 650W Switching Power Supply YM-2651J PSR650B-12D1
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  • $1,114.70 
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Genuine Power Supply 250 Watt 20 Pin Atx Zinfandel
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  • $28.08 
  • $39.99 Shipping
PSU For Seventeam 500W Switching Power Supply ST-500EAP FSP500-50HPN
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  • $915.98 
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PSU For IEI AT P8P9 200W Switching Power Supply ACE-916AP ACE-916A
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  • $900.45 
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Allied 250W Power Supply
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Allied 250W Power Supply
  • Model #: AL-A250ATX
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  • $74.00 
  • $39.99 Shipping

Power Supply

The PSU (a.k.a. power supply unit) is virtually the heart of the computer. It is a vitally important part that delivers power to components that comprise the computer system. A high-quality power supply can make the difference between a perfect machine and an unreliable one. Getting to know the importance of the power supply is just the first step, and getting the right PSU for your system means looking beyond just enormous power output.

You need to consider the physical size of the power supply, and whether or not it fits your case's form factor. How many "rails" does it have, and how many peripherals it can connect with. Look at placement of your cables and whether they'll fit into your case, and if you can run them to all the places your PSU must connect. Properly chosen, your power supply will last you a long time!

Bestselling Power Supplies Reviews:

Dustin Yates
9/22/2025 3:20:59 PM
Decent budget power supply

“ I bought this power supply to replace an old Seasonic PSU in my secondary gaming desktop. ”

ASRock Challenger CL-650G 650W 80 PLUS GOLD Certified Non-Modular Power Supply, ATX3.1 Ready, 5 Years Warranty
Thomas C.
9/21/2025 4:44:22 PM
Great efficient PSU

“ This is my first ASRock power supply, but I've been using an ASRock motherboard in a different machine for over 10 years. ”

ASRock Challenger CL-650G 650W 80 PLUS GOLD Certified Non-Modular Power Supply, ATX3.1 Ready, 5 Years Warranty
peter d.
9/21/2025 5:52:10 AM
SF850 SFX Power Suplly - really excellent

“ The old GPU had only a few millimeters clearance between it's fan and the full ATX power supply. ”

Corsair SF Series (2024) SF850, 80 PLUS Platinum, Fully Modular SFX Power Supply, CP-9020256-NA
Anonymous
9/19/2025 10:30:47 AM
MAG A1000GL PCIE 5, 80 GOLD Fully Modular Gaming PSU

“ MSI - MAG A1000GL PCIE 5, 80 GOLD Fully Modular Gaming PSU, 12V-2×6 Cable, ATX 3.1 & PCIE 5.1 Ready, 1000W Power Supply, 10 Year Warranty ”

MSI - MAG A1000GL PCIE 5, 80 GOLD Fully Modular Gaming PSU, 12V-2×6 Cable, ATX 3.1 & PCIE 5.1 Ready, 1000W Power Supply, 10 Year Warranty
Karl M.
9/18/2025 8:36:23 PM
Most all my PCs have Corsair Power Supplies!!!

“ Corsair Power supplies JAM! ”

CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts
Thomas G.
9/18/2025 11:16:47 AM
Good for Starter PC

“ I would recommend it for anyone who's looking to build a starter PC. ”

ASRock Challenger CL-650G 650W 80 PLUS GOLD Certified Non-Modular Power Supply, ATX3.1 Ready, 5 Years Warranty