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Power Supplies


Power supplies are responsible for feeding clean, stable juice to the sensitive components inside your PC. Calling it one of the most important components you'll buy is not an overstatement. The Tom's Hardware team can help you find the right PSU to keep your system running reliably all day long.


In response to our power bar tear-down, many of you asked to see a UPS receive the same treatment. So, today, we go on a tour inside a vintage APC BX1000.


We previously measured the gaming power consumption of two AMD Radeon R9 295X2 graphics cards at 450 W, but other sites arrived at different numbers. We put our measurements to the test with a 1000 W PSU in a...

Power Supplies on the Community

Power Supplies experts answer your questions

news - AUGUST 12 9

Silverstone has built the world's smallest fully-modular 1500 W ATX PSU.

Tutorial - AUGUST 26

HI sorry if you don't like videos but i made one for replacing or installing a new power supply. thanks for supporting my video. Hope you...

picture story - AUGUST 12 70

We count on power bars to protect our expensive PC hardware, and it's easy to take them for granted. Recently, one of our writers took an APC unit apart, though, and discovered some disturbing manufacturing...

reviews - AUGUST 1 44

Until recently, buying a PSU with a four-digit wattage was perhaps most useful for boasting among fellow hardware enthusiasts – there was barely any real need for such high wattages. However, Bitcoin mining...

news - JULY 30 5

Fractal Design has built a new PSU with partially modular cabling.

reviews - JULY 23 50

Do you think that all power supplies are manufactured by the brand on the label? Think again. We show what makes a good PSU and reveal who builds them. You can actually find lots of quality (instead of just...

news - JULY 21 2

Xilence is building new entry-level PSUs.

reviews - JULY 15 37

Although high-wattage power supplies get most of the glory, we take our hats off to small, efficient solutions offering more practical output. We take four sub-450 W PSUs and run them through our benchmark...

news - JULY 8 7

Dirac's new Tesla Cube is the most powerful SFX PSU to date.

news - JUNE 23 7

EVGA is shipping its new SuperNOVA 1200 P2 PSUs.

news - JUNE 9 16

Super Flower's new Titanium PSUs can push up to 1600 W, beating the competition by a good 100 watt margin.

news - JUNE 3 6

80 PLUS Platinum for the win?

news - JUNE 2 9

Corsair is launching a new line of PSUs in August.

news - MAY 29 9

SilentiumPC has revealed a PSU with a fan that will only spin up when necessary.

news - MAY 16 0

Lepa has released four new PSUs.

news - MAY 16 0

Cooler Master has three new PSUs.

news - MAY 8 9

BitFenix' Fury PSUs all come with individually sleeved cables.

news - MAY 2 30

The AX1500i is the world's first PSU to carry 80 Plus Titanium certification.

news - APRIL 30 6

Evga has released four cable sets for its new SuperNova G2 and P2 series of PSUs.

news - APRIL 25 0

Sharkoon introduces a cheap semi-modular PSU.

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