Monitored Alarm Systems

The role of diet

Power is an often underestimated. Everyone knows that it is necessary, and most people who build their own teams have some understanding of the fundamentals of what makes a diet. But most people tend to buy more power than they really need, or are planning to buy the cheapest power source which provides power, they think they need.

will not delve too deeply into the inner workings of power to the PC, but it's worth talking a little about the basics of how they work before we dive into what 'you have to buy. Note that all references to the current household are U.S. figures, to adjust accordingly if you're reading this in a different part of the world.

base PSU PC

The work of the power is to take 110-120V 60Hz to run and turn it into direct current and alternating current of appropriate frequency of your PC. Interestingly, the wall becomes aware of the direct current (DC), and becomes very high frequency alternating current. Attempt to convert directly to 60Hz DC current weight components are required, and PSUs would be too large. This high frequency AC is then converted to direct current.

You will often see references to power rails. A rail is a single voltage source. Most PCs use 3.3, 5 and 12 V for driving the circuit and components. For fans of most of the results, 12 V power supply is probably the most important. The V 3.3 and 5V rail is also the storage of certain components of the motherboard and expansion cards.

The 12V rail was once a relatively minor component of energy use in the PC, but two things have changed all that. First, Intel Pentium 4 CPU sent, I needed a 4-pin (now often 8-pin) 12V in order to maintain the operation of the aspiration of P4. The second thing that happened is that PCI Express graphics cards have begun to use external power connectors for high performance products. So now the power-hungry parts inside the PC requires a 12V power supply.

see a lively discussion among performance enthusiasts about the benefits of multiple +12 V rails from a single 12V rail. The idea behind a single channel, is that any particular 12V connector can get all the power you need, the total limit of 12 V supply Multiple tracks are safer, better circuit to turn off the power system and protection in case of power consumption in a bar is too high. For most users, the number of channels is not relevant to the overall performance. If you are interested, see the discussion on track by multiple single report.

How much power?

This is the major source of bugaboo buyers face to energy: the energy I need? There are various calculators of power, such as those of the outside view and vbutils. These tools are useful to provide a basis, but most of them do not have lists of all possible components. For example, the computer did not mention my Corsair Extreme Outervision waterproofing cost, so I had to take a guess. But he showed all the other components, and recommends a 718W power supply for my Core i7 980X CrossFireX system. It is close to one actually uses 750W.
In reality, however, most systems do not draw much power at full speed. I tested the graphics cards in the same test system for several years. This system has a Corsair TX850 PSU. The largest power draw I have seen with this system was when I checked the Asus March II with two Nvidia GTX 580 GPU overclocking and current limiter. Under a heavy load, the system has 718W. If you really overclock your CPU, and three GTX 580 cards, you may want one kilowatt or more. Most natural systems can cope with less than 800W.

Another problem with these calculators is that all power supplies are the same. 750W PSU I have in my system is a Corsair AX750, which can result in high current loads, even when approaching maximum production. Other sources of energy other large companies such as Final Antec, Coolermaster, Enermax and Seasonic others are as well built.

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Let's take a quick look at two different 750W power supplies as a comparison. Both the sport as a simple V. 12 One is the Diablotek PHD750 and the other is the PC Power & Cooling Silencer 750. Both have two 6-pin and two 8 pin PCI Express power connectors. However, the Diablotek is rated to deliver 54A on the 12V rail only. If we make the calculations, 54A x 12V 648W.

The PC Power & Cooling unit specifications to tell us who is assessed to be provided in individual 62.4A 12V rail, so it is 748.8W 62.4A x 12. So the PC Power & Cooling unit can supply almost all their energy costs for the 12V rail. He also has a better warranty.

This does not mean that the Diablotek is a "bad" PSU - but I never use it in a system where I know that food could be under stress as a with a dual GPU overclocking CPU significantly. The PC Power & Cooling unit is estimated at 88% efficiency, which translates into lower power consumption at rest. Of course, it costs $ 110 against $ 60 for Diablotek. But you get what you pay for.

repeat that, while past: power supplies, you get what you pay for. Quality of the components are not cheap, and food is essential to ensure a stable system. I have often encountered stability problems with systems that are solved by installing a quality diet of higher energy.

current delivery

Another issue to consider is the current version, particularly in connection PCI Express power. Not long ago, some graphics cards based on NVIDIA has caused problems in the system appeared to be perfectly adequate supplies. The problem was that the PSU will not ramp up to the present delivery system boot and system will not boot. The GPU is not really the problem, the PSU, which are usually multiple 12V rail design, rather than a single channel could not provide sufficient current for the GPU. Although the system has started correctly, stability problems may persist. Make sure to check the electrical connections of the rated current PCIe if you are planning a multi-rail design.

modular or not?

Modular Power Supplies

are popular because they allow you to easily organize and power connections easy. With standard power sources, there are still unused son you need to bundle up and finish somewhere in the box, and the result is not only unsightly, but can interfere with air circulation in the minor cases.

other hand, the modular power supplies are not perfect. Each connection can increase the impedance in the circuit, which may make it less effective. Modular PSU connector manufacturers have improved over time, the connection can not be as effective as straight wire. For most users, the convenience of modular offset minor losses in efficiency.

The real problem is the lack of standards for modular connections. Even like pin connectors may be different. The mishmash of different modular connectors are an incredible hassle, especially if you have different brands of power supplies. Even within the same brand, different power sources may have different modular jacks.

Each manufacturer uses different feeding styles of modularity, so extra cables hanging!

PSU

If manufacturers could agree on a set of connection rules, the connectors can be used interchangeably. It is also possible that the connectors are available aftermarket. For example, I like being able to add SATA connectors and dump some of the old styles-4-pin Molex in some configurations. But this is not possible in the current environment of different types of modular power connectors.

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