If your monitor doesn’t use any of those, adapter cables are cheap and plentiful. This usually isn’t a big deal-most new cards come with at least one DisplayPort, HDMI, and DVI connection. Of course, you’ll need a monitor that can actually accept the video output of your new card. Make Sure You Can Connect a Card to Your Monitor There are also splitters (like these that can split a single 8-pin plug into two 6- or 8-pin plugs). If you don't see the right types of plugs, but your power supply is otherwise powerful enough for your card, you may be able to find adapters (like these 6-pin to 8-pin adapters). On many modern power supplies, those plugs are even labeled PCI-E. Make sure your power supply has the right cables and plug types for the card you want. Some more powerful cards even require multiple connections. If the card needs a separate input, it will require either a 6-pin or 8-pin plug. Some low-power cards can run from the electricity supplied by the motherboard alone, but most cards need a separate input straight from the power supply.Ĭheck the specifications on the card you’re choosing. The other thing you need to check is whether you have an available power cable of the right type. If your current PSU can’t power the card you want, and you can't upgrade the power supply, you’ll need to choose a less powerful card. Find the power draw of other components, add them all up, and see if there’s enough left in your power supply to comfortably operate your new card.

If you’re not sure how much your other computer components are taking up, use this handy online calculator. If it doesn’t, you need to choose a less powerful card or upgrade your power supply at the same time. Make sure your power supply has at least that much available (with a 30-40w safety margin) before making your final choice.

Specifications for graphics cards list their estimated power draw (or consumption) in watts. But if you’re upgrading a inexpensive or compact desktop (or any non-gaming PC, really), you need to check your power supply. Most of the time this isn’t an issue-a relatively inexpensive 600-watt power supply can handle all but the most power-hungry graphics card plus all the standard PC components.

You'll need enough power coming from the power supply unit to feed the the new graphics card, in addition to all of your current computer components.

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