21.11.2013

Power supply newegg

This item will be sent through the Global Shipping Programme and includes international tracking. Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item.
By clicking Confirm bid, you are committing to buy this item from the seller if you are the winning bidder and have read and agree to the Global Shipping Programme terms and conditions - opens in a new window or tab. By clicking 1 Click Bid, you are agreeing to buy this item from the seller if you're the winning bidder. Having the right connectors and supplying an appropriate amount of power are things to consider when buying a power supply. You must ensure the power supply will fit inside the computer tower or case before making a purchase. Buying a power supply can be a daunting task as there are many different types to choose from, and they all have their own subtle differences. The most important part of buying a power supply is determining the amount of power needed to run all of the components in a computer. CCTV & Security SystemsWe have served many customers in all fileds of business in the middle east, from small retailers to large corporations. Time Attendance SolutionsThe best time attendance solutions for companies and corporations, a wide selection of time clock options.
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With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts. The diagram at right shows the main output connector of the power supply when viewed from the end.
I am curious, on most supplies, there needs to be at least a minimum load across the +5V (Not the +5vSB) to maintain the switching activity, otherwise the supply will shut-down. There are a few more, odd-ball, but going from some of the +5 to +12, does generate a voltage, but not sure if if it registers exact +7V, or not.. That is a very very low quality power supply, you would be better served by something made better. This is just what I needed for converting an old ATX power supply for use to power my 10M and 2M radios.
I've been using a 350W atx power supply for a few years now, well when I do electronic bread boarding stuff anyway. To anyone wants to make this, be very careful because these PSU have very hight wattage (400 W and more) and this could be lethal! It doesna€™t help that the power-supply market is awash with products from unscrupulous manufacturers that use substandard components and overstate the hardwarea€™s capabilities. First, always buy a power supply from a reputable manufacturer, and look for reviews of it before you buy.
Of course, you should also check the PSU's connectors to confirm the unit is compatible with your particular system.
When searching for a power supply, keep your eyes on three crucial features: power output, rails, and efficiency. Ideally your unit will delivers plenty of power to your components and offers some extra headroom in case you want to attach additional components later. For example, if the maximum power or combined TDP (total design power) of your systema€™s present components is 300 watts, a 600-watt PSU would be a good fit. Outervision and Thermaltake's handy-dandy PSU wattage calculator invites you to input your build components in exacting detaila€”right down to CPU overclocking voltages and specific water-cooling componentsa€”and then spits out a ballpark power-supply wattage for your system. On the subject of wattage, one common power-supply myth holds that higher-wattage power supplies necessarily consume more power.
A power supplya€™s efficiency rating is important because higher-efficiency units tend to have better components, waste less power, and generate less heata€”all of which contribute to less fan noise.
Corsair provides a thorough overview of power supply efficiency and of the 80 Plus program, if you'd like to learn more.


In addition to identifying output power, manufacturers will specify the number of +12V rails their PSUs contain. In a single-rail design, all of the power from the supply will be available to any component connected to the unit, regardless of the connector or cable used.
Meanwhile, the main disadvantage of a multi-rail PSU is that it can't share power among the different rails.
On the other hand, that disadvantage becomes a major advantage if you ever encounter a catastrophic failure. Technically, a power supply with hard-wired cabling is optimal because it requires no additional connections between the unita€™s internal PCB and the connector that will ultimately be plugged into one of your components.
That said, the additional resistance is normally minimal and not a cause for concern for most users. Amazon Shop buttons are programmatically attached to all reviews, regardless of products' final review scores. PCWorld helps you navigate the PC ecosystem to find the products you want and the advice you need to get the job done.
The item may have some signs of cosmetic wear, but is fully operational and functions as intended.
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By clicking Confirm bid you commit to buy this item from the seller if you are the winning bidder. Import charges previously quoted are subject to change if you increase you maximum bid amount. Many users choose a power supply based on total wattage alone, assuming that higher is always synonymous with better. Indeed, the abundance of PSU-related misinformation and deception in the marketplace would be comical if it werena€™t so harmful to consumers. Nevertheless, various indicators provide circumstantial evidence of PSU quality, and some guidelines are generally helpful. Higher-quality power supplies almost always use bigger and better capacitors, chokes, and other internal components, and they come outfitted with larger heatsinks for superior heat dissipationa€”all of which translates into more weight.
The term 20+4 pin refers to a connector that can function as either a 20-pin connector or a 24-pin connector.
Smaller units and units specially designed for enterprise and server applications are also available; but for common desktop systems, ATX power supplies are it. Other specifications and features are important, too, but these three directly affect the PSUa€™s performance. Most power supplies hit their peak efficiency levels with loads in the range of 40 to 80 percent. In a high-end system loaded with components that may peak collectively at 700 watts, a 1200-watt PSU would work well. A power supply with an efficiency rating of 80 percent provides 80 percent of its rated wattage as power to your system, while losing the other 20 percent as heat. Though the certification process isn't especially stringent, 80 Plus-certified units are confirmed to be at least 80 percent efficient; and 80 Plus has tiers for even more-efficient units, including 80 Plus Bronze, Silver, Gold, Platinum, and Titanium certifications. A a€?single-raila€? power supply has a single, high-power +12V rail for feeding power to hungry system components.
In the event of a failure, however, a single-rail power supply has the potential to shoot much more current into your components.
For example, if you connect 25 amps' worth of components to a +12V rail with a 20-amp maximum rating, the mismatch will trigger an overcurrent protection (OCP) mechanism and shut down, even though other rails my be available with plenty of power to spare.
The OCP mechanisms in a multi-rail power supply monitor each rail and will shut the whole unit down if they detect an overload on any of the rails. Power supplies are available with hard-wired cabling, with partially modular cabling, or with fully modular cabling.
One end of the cable is soldered into the PSUa€™s PCB and the other end terminates in a standard connector, with no breaks in the line.


Meanwhile, modular cabling greatly simplifies keeping the interior of your case nice and cleana€”just don't connect any superfluous cables to keep the clutter down. Our parent company, IDG, receives advertisement revenue for shopping activity generated by the links.
If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. This item may be a floor model or an item that has been returned to the seller after a period of use. A Others pay no attention to their PSU selection at all, and settle for whatever abomination arrived with their machine. But finding a solid, efficient power supply is possible if you arm yourself with the right knowledge. Larger cooling fans, which typically move more air while making less noise than smaller fans, are another plus. In the 6+2 pin connector shown at right, you can snap two of the pins in the connector on or off to suit your needs. Desktop power supplies have a power output rating of from 200 watts to 1800 watts (for ultra-high-end, enthusiast-class products).
Building to about 50 to 60 percent of a PSU's capacity is advisable to achieve maximum efficiency and yet leave room for future expansion. You can get by with lower-capacity units if you dona€™t think youa€™ll ever need to expand your system, but if you can afford it, choosing a higher-capacity PSU is a better bet. All else being equal, a 500-watt power supply won't consume any less power than a 1000-watt unit.
Power supplies in the higher certification tiers tend to command very high prices, however. Consequently, with a multi-rail PSU you must pay attention to which components you've plugged in to which rail, a mild nuisance that you don't have to worry about with a single-rail power supply.
The OCP on single-rail units kicks in only at much higher amperages, which could lead to a major melt-down if a serious overload occurs. From a performance standpoint, both work equally well; and in general both are very safe to use. In modular power supplies, you can add or remove cabling from the PSU as needed to avoid case clutter. Whenever you introduce an additional connection between the PSU and your componentsa€”as happens with modular power suppliesa€”you add more resistance and another potential point of failure into the line; and any increase in resistance translates into lost efficiency.
Because the buttons are attached programmatically, they should not be interpreted as editorial endorsements. But considering how important a good power supply is to a system's stability and long-term reliability, ita€™s a shame that PSUs get so little attention in comparison to sexier components like graphics cards and SSDs.
Corsair, Seasonic, and Antec are three manufacturers with reputations for producing high-quality power supplies, though even they may offer a few duds among all the studs. Wattage ratings higher than that would exceed the capabilities of a typical 15-ampere electrical outlet.
Average users with average needs should probably stick to the simple 80 Plus or the 80 Plus Bronze level unless they find a particularly juicy deal on a Silver or Gold PSU. If you're building an especially powerful system, though, multi-rail OCP provides an extra layer of safety in case something short-circuits, lessening the odds of frying your costly components during a computing catastrophe.
The important number here is the one for sustained or continuous power, not the one for peak power. If you have 300 watts' worth of components in a system, the system will consume 300 watts under load, regardless of whether the system is outfitted with a 500-watt power supply or a 1000-watt one. Again, a PSUa€™s wattage rating indicates the maximum amount of power the unit can provide to your systema€™s components, not how much power it consumes from the outlet.



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