- Make sure you're looking for a card with the correct type of DDR interface.
- Make sure you have the correct port, which is hopefully a PCI-Express x16 port for maximum performance.
- Opt for the version of the card with the most on-board video RAM.
- You will likely need to upgrade your power supply unit (PSU) to something that can put out more watts.
- Make sure it has a built-in fan.
Graphics cards eat up electricity, but their performance gain in gaming is worth it. Integrated graphics just won't cut it. You may need to have as much as 200-300 watts more of power. Check out the reviews and specifications for guidelines on power consumption and check to make sure the model isn't prone to fan failure. CPUs and GPUs will almost always fail without constant cooling. You can hook up more than one similar GPU with SLI or Crossfire if you need more power.