When constructing on a budget, the EVGA 400W power supply is an excellent choice. Supporting 30A on a single +12V rail gives you additional alternatives while reducing component needs. The EVGA 400W provides the connectors and security required for basic system configurations. It can be upgraded to include more powerful capacitors later if needed.
The quality of this power supply is evident when comparing it to other options in its price range. It features 80PLUS Bronze certification, which means that it meets strict energy efficiency requirements set by the government. This model also comes with a five-year warranty for added confidence.
Overall, the EVGA 400W is a great choice for people looking for a cost-effective, high-quality power supply.
The optimum power supply for your PC setup is one that delivers the appropriate amount of watts to all components at the same time. To calculate this manually, multiply the total amps of all components by the total voltages of all components. The result is the overall number of watts required for your PC design. There are two ways to automatically determine the correct power supply for your system: use our system power calculator or talk with one of our experts over the phone.
Our system power calculator will guide you through the process of selecting an appropriate power supply based on various factors such as total wattage needed, voltage requirements, and component values. You can also call us at 1-877-918-7086 if you would like to speak with a member of our technical support team. They will be able to provide guidance on the best power supply for your situation.
When shopping for a power supply, look for these characteristics: AMI rating (or SAR value) of at least 80. If the power supply doesn't have an AMI rating, it should be greater than or equal to 50 milliwatts per millivolt (mW/mV). This ensures that it's not a noisy unit and also helps prevent electric shock risk. Energy Star certification is another good thing to look for when choosing a power supply. Only select energy star-qualified products will display this logo. Power supplies must meet specific criteria to be labeled as such.
A decent power supply will last you ten years and will extend the life of all your components. It's a great buy for something that can be utilized on several builds. That being said, I believe that efficiency is a bit of a ruse. Simply choose one with steady voltages and decent capacitors. You'll have no problems with it.
The only other consideration is price. A quality supply should not cost an arm and a leg. If you're looking at supplies over $100, you're in for a disappointment. They won't provide quality parts or efficient design. Just look for one within your budget range that meets your needs.
I would recommend getting one with at least 90 watts per channel to start with. More than that and you won't need it.
Also, make sure that it comes with all the accessories you need. A good supply must have an AC adapter and a cable to connect it to your computer or motherboard. This is important because you don't want to get a new supply every time your old one fails its self-destruct button.
Finally, look for one with a solid reputation. There are many low-cost supplies on the market, but only a few high-quality ones. The former usually suffer from poor design and/or obsolete components. Avoid these at all costs and look for reviews from sites such as Anandtech, Tom's Hardware, and PC World.
When you have or want to build a "medium-end" PC for yourself, a 500 watt PSU is a very good option because it is truly powerful enough to power up your entire PC without any trouble. More than enough power for most people's needs too!
The only down side to using a 500-watt power supply is that it is not that efficient at producing electricity. Meaning that it will consume more energy than what it produces. In fact, it uses about 45% of its capacity rating while running at full load. This means that it could potentially overheat and fail early if it is not treated with care. It is recommended that you keep an eye on the temperature of your power supply and take action if it starts to get too hot.
There are also some models out there that use 1,000 watts or more as their maximum output capacity. These would be suitable for high end gaming systems or large audio setups.
The more powerful the application, the more power used, and the greater the wattage required from the power source. The first rule of thumb is that having too much power is preferable than not having enough. As a result, running a higher wattage unit at half capacity is preferable to running a lower wattage unit at full capacity. For example, an electric stove that is able to boil 12 cups of water per hour uses 120 watts of power while a stove that can only boil 6 cups per hour uses 180 watts of power. Heating systems average about 15% efficiency so it is reasonable to estimate that high-wattage appliances use about 75% as much energy as low-wattage models.
Higher wattage means that the device requires more electricity to operate. This means that you will need a power source that can deliver more current to your house (either naturally or through an electrical outlet). High-wattage appliances also usually run hotter which could be cause for concern if you have a home built before 1994 without proper insulation (or with very thin walls and/or no attic space).
In general, a higher wattage model will use less energy overall because it runs at half speed most of the time. This is why high-wattage appliances are often more expensive than their low-wattage counterparts. They cost more to produce and they use more energy per unit of output.
However, there are exceptions to this rule.
400 watts would not have been enough. A current mid-range system can probably get by with 400 watts, but when you consider multiple optical drives, high-end graphic cards (though the new Radeons are fairly efficient), the option of upgrading to SLI, 6-12 GB of RAM, and so on, 400 watts is just insufficient. At least a 500-600 watt power supply is recommended.
The reason why your computer is slow is because it doesn't have enough power available to it. Even if you had a 1000 watt power supply, it wouldn't help your computer if it was being used for something else along with it. You should keep that in mind when choosing a power supply for your own system. If you want your computer to be able to use all the power that it needs, then you should get a power supply that can handle at least 500 watts.