There are 2x HDMI (with MHL), 1x DisplayPort and 1x Mini DisplayPort input interfaces provided for video connections. There is also a DisplayPort out connection for daisy chaining several screens. There is no DVI or D-sub offered here which might be a bit of a pain for older systems and graphics cards. Cables are provided in the box for only DP > Mini DP. We understand from a few reports that you can actually use a DVI to HDMI adapter to output from a DVI graphics card, to HDMI input on the monitor. This might require a dual-link DVI > HDMI converter given the resolution (to be safe at least) and you may need to create a custom resolution from your graphics card as it seems the 2560 x 1440 @ 60Hz is not automatically detected. It does seem to work though, providing compatibility with DVI graphics cards at least. DVI to DisplayPort is more tricky and would require an active adapter which can be quite expensive and may be more hit and miss.