450-550W Power Supplies
A 450W to 550W power supply is ideal for budget and office builds, or gaming PCs with an efficient mid-range or entry graphics card. Our range of 500W and 550W units covers trusted brands with solid 80 Plus efficiency and quiet operation, all in UK stock with a full warranty and a live price on each listing. A quality lower-wattage PSU is a safer bet than an unbranded one of the same rating. Not sure what wattage you need? Our power supply guide works it out with you.
450-550W Power Supplies Buying Guide and FAQ
This 450-550W Power Supplies range groups power supplies by output. Below are the common questions on what wattage suits your build.
Is a 450-550W power supply enough for my PC?
As a rough guide, 450 to 550W suits a basic or office build or a low-power graphics card. Leaving some headroom keeps the unit cool and quiet.
What graphics card does a 450-550W PSU pair with?
Size the PSU around the graphics card, since it is the biggest draw. A 450-550W unit works with mid-range cards, but always check the card maker's recommended wattage and that the PSU has the right power connectors, including the 12V-2x6 (12VHPWR) plug on newer Nvidia cards.
Should I get more wattage than I need?
A little headroom is sensible, because it keeps the PSU running cool, quiet and efficient, and leaves room for a future upgrade. There is no need to go wildly over the top, so pick a wattage that covers your parts with some margin and choose a reputable 80 Plus rated unit.