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Replacing an old Computer Power Supply with a new one is an excellent solution to a number of problems that a computer might face. It is important to ensure that you are having the right wattage power supply. In fact, having a higher wattage power supply does not hurt.

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Maybe you are considering upgrading your current case which has a 300W power supply unit to some better-looking case, and the better-looking case you are considering has a 520W power supply unit. You must be asking yourself whether doing so is safe. You must also be wondering how the difference will influence the operation of your computer.

Well, it is pretty all right to install a Desktop Power Supply or a laptop power supply with a higher wattage. And if everything else was working quite all right before, you are most likely to notice no any difference. This is also true with HP Power Supply and Lenovo Power Supply.

What does “W” means?

The “W” basically stands for watts. It is a measure of the electric power. It is the unit used to indicate the amount of electric power that a power supply can provide. Power supplies are typically rated by the highest amount of power that they can deliver. This means that a Dell Power Supply rated for 520W will supply more amount of electric power as compared to a PSU that is rated 300W. That is definitely more electric power.

Even though that is more electric power, it will not give your computer more powers. Besides, it will not necessarily make your computer to run faster. Your computer will still use only the amount of electric power required to run its components effectively. This also applies to

How much power do you need?

In case you have a computer that has been running quite well on a 300W computer power supply, then it does not necessarily need a bigger PSU. However, there is completely nothing wrong with using a bigger power supply. There is a possibility that a larger, new power supply could be a little quieter and a bit more efficient.

But even if you start using a larger power supply, your computer will still continue to use just the amount of electric power it was using earlier, which in this case is less than 300W. Actually, the fact that your larger new power supply can provide more electric power is completely beside the point here.

A Computer Power Supply not only delivers constant stable power to your computer, but is also responsible for preventing the current from potentially fluctuating too much. It also protects your computer from electric dangers such as power surges.

To ensure that you are choosing the best power supply that will serve you perfectly and also last you many years, there are certain mistakes that you must avoid. Whether you are choosing a Dell Power Supply, a Lenovo Power Supply, or a HP Power Supply, you should not make the following mistakes.

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1. Choosing a power supply that has no capacity to deliver enough power

Your laptop or desktop needs enough powers to power all its components for it to work properly. So, you should avoid choosing a power supply that cannot deliver the required amount of power. Be sure to calculate what amount of power your computer needs and then add about 100 Watts to the figure. Now you can go ahead and pick a power supply that can deliver the amount of power you require.

2. Buying a cheap power supply

Of course, it is not always true that the most expensive item is of the best quality available. However, you should avoid choosing a power supply just because it costs less and it will allow you to save a lot of money. Instead, consider the quality of the item rather than its price.

3. Buying a computer power supply with very poor efficiency

Of course, your computer cannot explode just because of a power supply that has poor efficiency. However, your electricity bill will definitely explode and you will end up spending a lot of money on electricity. To avoid this, choose a more efficient power supply to power your computer effectively and to save on electricity bill. For instance, if your HP computer requires about 300 watts of power, you should choose a HP Power Supply with an efficiency rating of 80%. That means that your computer will pull just about 353 watts of input and you will be able to save more money.

4. Failure to consider the number of connectors you require

When choosing a power supply at 365PowerSupply.com, you should never fail to consider the number of connectors you need. Ensure that you have enough connectors for all the parts. You should also ensure that the connectors are long enough.

The primary function of a Desktop Power Supply or Dell Power Supply or generally computer power supplies is to convert AC electricity to DC electricity because it is the AC electricity that comes from the socket or walls but the computers need DC electricity to function.

Computer power supplies generally come in 2 main flavors: switched mode and linear mode. Let us discus each of them briefly so that you can have a better understanding of them.

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Linear power suppliers

A linear computer power supply requires very few and simple steps to convert the EC electricity into the DC electricity at a safe level for a computer. They constantly expend energy and usually dump the extra energy as heat. Typically, these power supplies normally require larger components basically for delivery of high power. This is something that limits these power supplies to just smaller power applications in most cases.

The main advantage of linear power supplies is that their output often has little noise. This makes them ideal for all places and environments including laboratories and hospitals.

Switched mode power supplies

Switched mode computer power supplies are equipped with internal switches which control the general flow of electricity that is going into all other parts of the power supply. Even though this is something that adds complexity, it still has some benefits. First, the switched mode power supply uses far less amount of electricity as compared to linear power supply. Secondly, the switching action of the switched mode power supply generates very high-frequency AC electricity. Due to the high-frequency AC electricity, there are some components like transformers and inductors that this type of power supply allows to be smaller.

The main disadvantage of switched mode power supplies is that the switching usually creates a lot of noise which must always be shielded in order to prevent leakage. This is done by filtering the noise in the output.

Laptop power supplies

A Desktop Power Supply is somehow different from a laptop power supply. For instance, a Lenovo Power Supply converts the power from the socket into electricity that can be used by the laptop. The electricity is usually divided between the internal power supply and the external adapter supply. The adapter then converts the electricity from the socket to something that the internal power supply can be able to use. This is typically a higher DC voltage as compared to what a Desktop Power Supply usually furnishes.