How to install/see available graphics card input slots

HI, I'm planning on buying a new graphics card. I have an Inspiron 720. I have a premade computer with Intel Intetlrgrated Chip set G4/G3. Please ask for extra specs if required.

First you must look in the manual (and in the case) to check there's a pci-e slot and what version it is. Recent gfx cards are v3, which is somewhat backwards compatable with a v2 slot, but not necessarily with an earlier version.

Next you have to decide what type of gfx card you need - either hi-end for gaming or something cheaper, say, just to run multiple monitors. For gaming, you should check the websites of games you are interested in to see how powerful a card you need to play their game.

When you've got an idea of the type of card you need, you should check that the psu in your pc can power it. Store bought computers are built down to a price and don't allow much leeway for extra power demands (eg from the extra gfx card). A lower end card will probably run ok with the standard psu. A powerful card uses more watts and usually needs extra 12V power connectors that plug directly into the card. Standard desktop psu's can't usually supply enough watts for a hi-end card (or have the 12V aux connectors). In that scenario, you have to invest in a new psu.

A few ideas for you to think about.

1) Sorry, lost my manual back in '07. That's why I need a new card to begin with!
2) is there anyway to add power to your computer without a new power supply?

2) nope - if you need more watts, it's a new psu.

When you look online for gfx cards, it'll often say xxx watts psu recommended etc.