Best power supply for desktop pc,joliet phone book directory,astrology daily extended horoscope for aquarius love,horoscope cancer ganeshaspeaks - 2016 Feature

06.03.2015

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. Besides the motherboard power connectors, all power supplies include a variety of additional power connectors, mainly used for internally mounted drives but usable by other components, such as graphics cards.
Perhaps the most common additional power connector seen on virtually all power supplies is the peripheral power connector, also called the disk drive power connector. This is the one connector type that has been on all PC power supplies from the original IBM PC to the latest systems built today. A peripheral power connector is a four-pin connector with round terminals spaced 0.200 inches apart, rated to carry up to 11 amps per pin. When 3.5-inch floppy drives were first being integrated into PCs in the mid-1980s, it was clear that a smaller power connector was necessary.
The peripheral and floppy power connectors are universal with regard to pin configuration and even wire color. Early power supplies featured only two peripheral power connectors, whereas later power supplies featured four or more of the larger peripheral (disk drive) connectors and one or two of the smaller floppy power connectors. If you are adding drives and need additional power connectors, Y splitter cables as well as peripheral-to-floppy power connector adapters are available from many electronics supply houses (including RadioShack). If you want to add Serial ATA drives to an existing system, you will need a newer power supply that includes a Serial ATA (SATA) power connector. In the SATA power connector, each wire is connected to three terminal pins, and the wire numbering is not in sync with the terminal numbering, which can be confusing. If your power supply does not feature SATA power connectors, you can use an adapter to convert a standard peripheral power connector to a SATA power connector. Quote:On the other hand, if you plug into a 240 V outlet and have the switch set for 120 V, you can cause damage. Did that when unboxing a computer, must have flipped the small red switch on the supply and boom, at the Windows XP loading bar the PSU exploded. Could this explain why I only have 4-6GB memory at post, but 10GB after a quick power off and back on (didn't bother with a reset switch when designing case). Someone said I'd have to reseat the cpu, but maybe it's just that rubbish coolermaster power supply? Until unexpected glitch ruined the flashing if my motherboard, beyond this, I think the floppy connector is useless.
As soon as he turned on the computer, the PSU failed so badly that it exploded into flames and took out everything: motherboard, RAM, CPU, GPU, hard drive, CD drive, you name it.
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In 1998, a group of companies including Intel, Hewlett-Packard, NEC, Dell, Data General, Micron, and Compaq created the Server System Infrastructure (SSI), an industry initiative to promote industry-standard form factors covering common server hardware elements such as chassis, power supplies, motherboards, and other components.
In 1998, the SSI created the entry-level power supply (EPS) specification, which defines an industry-standard power supply form factor for entry-level pedestal (standalone tower chassis) servers.
The EPS specification originally used a mechanical form factor identical to ATX, but the EPS form factor was later extended to support higher power outputs by allowing the body of the supply to be deeper if necessary. The only other major difference between EPS12V and ATX12V is that EPS power supplies can be up to 180 mm or 230 mm deep, whereas ATX supplies are technically limited to 140 mm depth according to the specification.
This power supply is basically a 230 mm-deep EPS12V supply that works in place of or as an upgrade to an ATX12V supply as long as the chassis can accommodate the additional depth. Connector compatibility isn’t generally a problem because, by virtue of the Molex Mini-Fit Jr.
If you have the room, an EPS12V power supply can be used with most ATX chassis and motherboards for the ultimate in high-output capabilities. TFX12V power supplies are designed to deliver nominal power output capabilities of 180–300 watts, which is more than adequate for the smaller systems for which they are designed. Unlike SFX-based supplies, only one standard mechanical form factor exists for TFX12V supplies.
CFX12V power supplies are designed to deliver nominal power output capabilities of 220–300 watts, which is more than adequate for the mid-sized systems for which they are designed. CFX12V supplies have included the four-pin +12 V connector since the standard first appeared in November 2003, well after the +12 V connector had been included in other power supply form factors.
Intel originally introduced the LFX12V (low profile form factor) power supply in April 2004. LFX12V power supplies are designed to deliver nominal power output capabilities of 180–260 watts, which is ideal for the tiny systems for which they are designed.


All LFX12V supplies include a 24-pin main motherboard power connector, a four-pin +12 V connector, and Serial ATA connectors. A power supply company called FSP (Fortron Source Power) originally introduced variations of what was to become the Flex ATX power supply form factor in 2001 in the form of proprietary designs for SFF desktop and thin (1U) server systems. Flex ATX power supplies, like the one shown below, are designed to deliver nominal power output capabilities of between 180 and 270 watts, which is ideal for the small systems for which they are designed. Flex ATX power supplies include either a 20-pin or 24-pin main motherboard power connector and a four-pin +12 V connector for the motherboard. When it comes to your company or individual needs, no matter your location, you can completely trust JW Global to provide the best repair solutions that meet the rigorous specifications for private industry, health care, government, military and the needs of the broadcasting industry.
Current unitsa€”our staff is continually trained in the latest technology for testing and repairs through on-going professional development. Out-of-warrantya€”we offer preventive maintenance so you can methodically swap out systems and manage your power pipeline without an untimely interruption.
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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.
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Most of these connectors are industry-standard types required by the various power supply form factor specifications. What we know as the peripheral power connector was originally created by AMP as part of the commercial MATE-N-LOK series, although since it is also manufactured and sold by Molex, it is often incorrectly called a Molex connector.
It is usually embossed in the plastic connector body; however, it is often tiny and difficult to read. It is most commonly known as a disk drive connector, but it is also used in some systems to provide additional power to the motherboard, video card, cooling fans, or just about anything that can use +5 V or +12 V power.
Because there is one +12 V pin and one +5 V pin (the other two are grounds), the maximum power-handling capability of the peripheral connector is 187 watts. The answer came in what is now known as the floppy power connector, which was created by AMP as part of the economy interconnection (EI) series. Be careful if you are making or using an adapter cable from one type of connector to another. Depending on their power ratings and intended uses, some supplies have as many as eight or more peripheral or floppy power connectors.
These cables can adapt a single power connector to service two drives or enable you to convert the large peripheral power connector to a smaller floppy drive power connector. The SATA power connector is a special 15-pin connector fed by only five wires, meaning three pins are connected directly to each wire.
The accumulated price for 11 months and 10 days that we gathered for this gadget indicates that the average percentage in price change is 4.2%. The idea was to be able to design network servers that could use industry-standard interchangeable parts.
The main difference today between ATX and EPS with respect to connectors is the use of an eight-pin dual +12 V connector in EPS12V instead of a four-pin +12 V connector in ATX12V. EPS12V supplies are sometimes called extended ATX power supplies because of their optional extended length. The basic shape of TFX12V is longer and narrower than the ATX- or SFX-based form factors, allowing it to more easily fit into low-profile systems. TFX12V supplies include a side-mounted internal 80 mm fan that is usually thermostatically controlled, so as to run both coolly and quietly. TFX12V supplies have also always included the four-pin +12 V connector since the standard appeared in April 2002, well after the +12 V connector had been included in other power supply form factors. CFX12V supplies include a rear-mounted internal 80 mm fan that is typically thermostatically controlled, which enables it to run both coolly and quietly. TFX12V also included the 24-pin main power connector and Serial ATA power connectors as mandatory since its inception. It’s designed for ultra-small BTX systems of about 6–9 liters in volume, primarily using picoBTX or nanoBTX motherboards.
LFX12V supplies include an internal 60 mm fan, which is 20 mm smaller than that of the CFX12V design. The current LFX12V 1.1 release dates from April 2005 and has only minor revisions over the previous version. Flex ATX supplies usually include one or two internal 40 mm fans; however, larger fans can be mounted horizontally, and even fanless models exist. They also usually include standard peripheral and floppy power connectors, with newer units having Serial ATA power connectors as well.


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. This section discusses the various types of additional device power connectors you’re likely to find in your PC. These connectors are now used on all types of smaller drives and devices and feature the same +12 V, +5 V, and ground pins as the larger peripheral power connector. If you are using several Y-adapters, be sure that your total power supply output is capable of supplying the additional power and that you don’t draw more power than a single connector can handle. The overall width is about the same as the peripheral power connector, but the SATA connector is significantly thinner. Fortunately, though, this is not a problem for most applications because most drives do not require +3.3 V and use only +12 V and +5 V instead. Checked online, found the incompatibility, dodged the bullet bought a PSU for ?20 and an adapter for ?5. Price prediction trend forecasts give an extra piece of information, and we also encourage and suggest using our predictions to decide whether to buy or wait. Some of the new or latest reviews in Security & Surveillance might be helpful and interesting to you.
The first major enhancement was the use of a 24-pin main power connector, which eventually trickled down to the ATX12V as well as other power supply form factor specifications in 2003. The eight-pin dual +12 V connector is essentially the equivalent of two four-pin connectors mated together and is used by entry-level servers to power multiple processors. If you plan to use one of these EPS12V power supplies in a standard ATX chassis, it’s important that you measure the available space in your chassis to ensure you have the room behind the supply for the additional depth. A symmetrically designed mounting system allows the fan to be oriented facing either side inside the system for optimum cooling and flexibility in accommodating different chassis layouts.
The shape of the supply includes a ledge such that part of the supply can extend over the motherboard, reducing the overall size of the system. The current CFX12V 1.2 release dates from 2005 and has only minor revisions over previous versions, including a change to HCS terminals in the connectors.
Similar to the CFX12V fan, it is usually thermostatically controlled to ensure quiet operation while still providing adequate cooling.
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 following image shows the keying with respect to pin numbers on the larger drive power connector. All the most recent power supply form factor specifications include SATA power connectors as mandatory for systems supporting SATA drives. Although this book does not cover network servers, in many ways a low-end server is a high-end PC, and many high-end components that were once found only on servers have trickled down to standard PCs. EPS also originally called for the use of HCS terminals in the Molex Mini-Fit Jr.–based power supply connectors, which became standard in ATX12V in March 2005. Most power supplies with true ratings of 500 watts or more are made in the EPS12V form factor, because it isn’t really possible to fit more power than that into the standard ATX size. Because of the way the connectors are designed, an eight-pin +12 V connector can plug into a four-pin +12 V connector on a motherboard, with the unused pins simply hanging unused, offset to one side or the other. Revision 2.1 (July 2005) includes only minor updates and changes from the previous version. These are also sometimes called 1U (one unit) power supplies because they are used in many 1U server chassis. 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. The pins are rated for only two amps each, giving a maximum power-handling capability of 34 watts.
In addition, the (now-obsolete) auxiliary six-pin power connector, the four-pin +12 V power connector, and a variation of the six-pin graphics power connector all appeared in the EPS specifications before ending up in ATX.
You may think these would require a custom EPS chassis, but in fact many (if not most) full-sized ATX tower chassis can handle these greater depths without interference, especially when using one of the newer breed of shorter-length optical drives (because one or more of the optical drives are often inline with the power supply). 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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