A:Answer You need to Google the specs of your computer and compare to the minimum requirements to find out if it will 'fit' in your computer (PCI Express, x16 PCIe slot). As for the power supply if you're still using the same one that came with your pre-build, then you'll more than likely need a new PSU. Pre-builds typically use the cheapest parts they can , e.g. the lowest Watts that will run the computer, but again check the specs of your computer (the box says 450w min, but power usage can vary).
