901W & Above PSUs (10 products)

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High Performance PSUs

Upgrade your PC with one of our highest specification PSUs. Choose from a fully or semi modular unit and up to 80Plus Titanium certified efficiency ratings. Packed with up to 1500w of power these high-performance Power Supply Units will make a massive difference to your PCs performance and reliability. If you have, or are upgrading to, a good specification PC you need a top quality PSU. All those featured on this page will improve the stability, reliability, and efficiency of your computer. Buy your Power Supply Unit today and we can ship it to you for free (terms and conditions apply).

What does a PSU do?

A power supply unit (PSU) converts mains AC to low-voltage regulated DC power and then distributes it to the internal components of your computer. Modern personal computers universally use switched-mode power supplies. Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the mains voltage. The bottom line is that your computer cannot function without a PSU.

How much power do you need?

Let’s say that you need a power supply of 500 watts for your computer. It is recommended that you get more power than you need so that your computer isn’t running at full capacity all the time. So, if you need 500 watts, think about getting 600 watts of power. If your computer runs at full capacity for long periods, its lifespan will be shortened and it will also be less efficient. This, of course, will cost you more in electricity and will also generate more heat and noise. Another reason why you should get more power is that if you have used an online power calculator, they are not always accurate, so give your PC some breathing space.

Extra power for overclocking?

Overclocking, or raising a part’s (CPU, Video Card, RAM) frequency beyond the manufacturer set frequency to gain extra performance, is a strain for a power supply. This means that if you overclock, it is even more important to have a high-quality power supply that can handle the extra load.

More power is consumed by the part which has been overclocked as the frequency increases and if you raise the voltage, then you will use even more power. This in turn puts even more stress on your power supply. Every CPU and video card have different power needs, so it is quite hard to put an exact power consumption figure on each. The wise thing to do is if you overclock, just make sure your power supply can handle the extra load. If you have a cheap power supply or are functioning pretty close to the limit, it is advisable not to overclock or you could damage your computer.