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.
Part 2: Four Cheap 80 PLUS Bronze Power Supplies, Reviewed
Aug 28, 2013 - in Reviews
Ready for part two of our low-cost power supply round-up? Here are four more products, including Seasonic's SSR-360GP, which is 80 PLUS Gold-certified. Is this little 360 W PSU the bargain of the century, or is its Gold label simply pyrite?
Part 1: Four Cheap 80 PLUS Bronze Power Supplies, Reviewed
Aug 27, 2013 - in Reviews
Power supply manufacturers condition us to think that efficiency is the one variable you need to pay the most attention to. But we have a suite of tests that more thoroughly taxes PSUs. Can these four inexpensive units under $70 make it through unscathed?
Five 550 And 600 W 80 PLUS Platinum Power Supplies, Tested
Feb 5, 2013 - in Reviews
A good power supply doesn't just provide you with ample output. Increasingly, vendors have put a bigger emphasis on delivering power more efficiently, too. We're testing five 80 PLUS Platinum-rated power supplies in the 550- to 600-watt range.
Who's Who In Power Supplies, 2013: Brands Vs. Manufacturers
Jan 22, 2013 - in Reviews
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 scrap metal) behind some of the budget labels.
Silent Running: Two Fanless Power Supplies And A Quiet One, Tested
Jul 19, 2012 - in Reviews
The power supply typically isn't the noisiest component in a high-end PC. Nevertheless, many folks are serious about cutting noise, and go the extra mile for a quiet system. We step in with a comparison of two silent models against one low-noise PSU.
Chris Angelini On Tom's Hardware In 2012
Jan 16, 2012 - in Reviews
I just got back from CES 2012. And although I’ve attended a great many Consumer Electronics Shows, Computexes, and Comdexes (never a CeBIT), this year’s show was by far the most intense. It wasn’t that there were tons of really awesome products. In fact,
Power Supply Reference: Consumption, Savings, And More
Jan 10, 2012 - in Reviews
In this final excerpt from Scott Mueller's Upgrading And Repairing PCs, 20th Edition, we examine a number of power supply usage factors including power consumption calculations, power savings, power protection systems, and troubleshooting.
Power Supply 101: A Reference Of Specifications
Dec 13, 2011 - in Reviews
Today's article contains everything you've ever wanted to know about PC power supply specifications. Form factor dimensions, cable end pinouts, voltage/amp/watt specifications, and even compatibility issues are covered in this comprehensive reference!
Picking The Right Power Supply: What You Should Know
Sep 6, 2011 - in Reviews
How does a power supply work? Why is it important to choose a sufficiently powerful and efficient model? We guide you through discussions of efficiency and tips for getting the best deal before we go on to explain why less can be more in the PSU market.
80 PLUS Gold: Four Efficient 700-850 W Power Supplies
May 18, 2011 - in Reviews
Gamers and enthusiasts are always on the lookout for crème de la crème hardware. It's easy to pick winning CPUs and graphics cards; less so for PSUs. We put four 80 PLUS Gold devices from Antec, FSP, Seasonic, and SilverStone under the magnifying glass.
Don't Be Surprised When Your Cheap PSU Blows Up
May 5, 2011 - in Reviews
We purchased a few interesting PSUs through a few dubious online vendors, among then an "extremely quiet" 500 W model for less than $30. That’s a tempting offer, but our test of three different units proves you should stay away from cheapo power supplies.
External Battery Roundup: Stay Away From The Wall Socket
Mar 8, 2011 - in Reviews
Battery life is always such a big deal in our mobile coverage (often because gaming systems fall so short). But don't feel limited by the built-in power source. Today we round up 15 external batteries that can keep you running longer away from a socket.
Three 1000 W 80 PLUS Gold-Certified Power Supplies Tested
Feb 10, 2011 - in Reviews
We received a trio of 1000 W power supplies priced between $200 and $300, so we ran them through our usual suite of tests to see if they really live up to their 80 PLUS Gold certifications. Surprisingly, all three hiccuped during efficiency testing.
Roundup: 12 Gaming Power Supplies Compared
Dec 29, 2010 - in Reviews
Gamers demand a lot from their computers, starting with the PSU. Therefore, almost every PSU manufacturer sells products optimized for gaming PCs. We introduce ripple and noise testing in this roundup to further improve our power supply evaluations.
Enthusiast Power Protection: Four-Way 900 W UPS Roundup
Nov 14, 2010 - in Reviews
It's downright negligent to ignore the power needs of your high-end hardware. While many power users go to the trouble of tracking down solid PSUs, we recommend going a step further and investing in battery backup. We round up four enthusiast units.
Who's Who In Power Supplies: Brands, Labels, And OEMs
Nov 11, 2010 - in Reviews
Did you think all power supplies were manufactured by the brand selling them? We show you what makes a good PSU and reveal who actually builds PSUs. You can actually find lots of quality, instead of just scrap metal, behind some of the budget labels.
Sub-$75 Mainstream Power Supply Roundup
Oct 6, 2010 - in Reviews
In our last power supply article, we reviewed several relatively expensive, high-performance products suitable for powerful gaming PCs and workstations. This time around, we're looking at something a little bit more affordable for the mainstream crowd.
On The Bench: Corsair's HS1 USB Gaming Headset
Sep 16, 2010 - in Reviews
You probably know Corsair best for its memory products, power supplies, and SSDs. But now the company is jumping into the crowded headset market with an unassuming entry that’s both affordable and capable of offering great sound quality.
Bang For Your Buck: Four 500 W Power Supplies Reviewed
Jul 8, 2010 - in Reviews
Enthusiasts often say that you can never have too much performance. However, a 500W power supply is perfectly ample for a majority of mid-range PCs. This is one of those cases where a solid ratio of performance to price is preferable to gross excess.
Soon At Tom's Hardware: Full-Scale Power Supply Testing
Jun 22, 2010 - in Reviews
Often overlooked, the power supply plays a crucial role in supplying the PC with stable and sufficient power. Unfortunately, not all PSUs on the market meet expectations. This is why Tom's Hardware will now regularly be testing power supplies.
Small Business Battery Backup: Eaton's 3,000VA PW5130
May 8, 2009 - in Reviews
Uninterruptible power supplies (what most people call battery backup) are essential for protecting servers and bridging power outages. We looked at a high-end solution from Eaton, which offers impressive flexibility in a small business environment.
APC’s Universal Notebook Battery Booster
Mar 27, 2009 - in Reviews
The Universal Notebook Battery is a sleek, carry-on battery stack that can double your notebook battery capacity and run time, while providing an additional USB port to charge other devices.
Tom's OC Competition: Mid-day Pics
Nov 9, 2008 - in Picture Story
Check out mid-day pictures from our overclocking competition!
Power Supply Roundup: Part II
Nov 7, 2008 - in Reviews
In Part I of our power supply roundup, we went through five mainstream PSUs rated at up to 700 W. Round two sees us tackle another seven mid-range units in an effort to determine which power supply deserves your attention.
PSU Roundup: Performance, Price, Efficiency
Oct 16, 2008 - in Reviews
Good performance, high efficiency and low price: It’s not easing choosing a power supply that offers all three of these features. Tom’s Hardware tests mainstream power supplies of up to 700 watts to determine which will meet your needs best.
Silent PSUs: Fortron Versus Silverstone
Aug 20, 2008 - in Reviews
Home theater PCs should be as quiet as possible. Since most of the noise is caused by the fans on the CPU and power supply, we tested two passive power supplies that use no fans.
PC Power Supplies: More Important than You Think
Aug 9, 2007 - in Reviews
Despite their importance and the sometimes demanding requirements they must satisfy, power supplies just don't get enough attention. We illuminate everything worth knowing about power supplies here, using Gigabyte's new Odin GT series as an illustration. The Odin family brings software monitoring and configuration into an already very interesting picture.
5 Power Supplies Get the Full Juice Treatment
Feb 7, 2006 - in Reviews
We give five new power supply units the full juice treatment after our previous stress tests laid many supposedly high-end units to rest in the scrap heap. Did vendors take heed of the hard lessons they learned during our past tests?
Stress Test: Power Supplies Under Full Load
Jul 11, 2005 - in Reviews
We put PC power supplies from 300 to 850 watts under continuous load to see if they can satisfy the power appetite of potent Athlon and P4 systems. Are they efficient and stable? Click into the THG Laboratory to find out!
How THG Tests Power Supplies
Jul 11, 2005 - in Reviews
Power supply performance specs are going through the roof, but you can't tell from looking at a device whether it will actually deliver the 600 watts it claims to. That's why we put them through their paces in the lab - and this is how we do it.