Updating your video card driver
Some readers have found that a locked-down BIOS means that even though the fans will spin up on a new graphics card, nothing will appear on the screen. Before you order anything, look inside your case to check whether your current PSU is capable of running a new graphics card.Remove the side panel and look at the ‘Total continuous power’ figure. If you're going for a top-end card, you may even need 650- or 700W.Here we explain to upgrade your graphics card for less than £150.Just be sure to first check that your motherboard has an available PCI Express slot, the case has enough room to fit a card, and your power supply that can handle the extra strain.
Warning: Even if a graphics card will physically fit and your power supply has enough power (and the right connectors), it may not work.
Certain PC vendors including Dell, HP and Acer use custom-designed motherboards.