Each screen has two monitor inputs on it, one DVI (digital) and one VGA (analogue), you can use either port to connect to a PC, this ensures compatibility with any graphics card outputs available.
Where possible we recommend using the DVI port as this gives you a digital signal between the PC and screen which is better quality and is quicker to setup.
If you choose the VGA leads from the monitor options we will also supply DVI to VGA adapters which means you can connect up to both VGA and DVI-I monitor outputs.