Our PCI and PCI-E DVR and capture cards will work on Windows operating systems from XP up to Windows 7 - 32 bit and will also work on Linux machines using Zoneminder. Some of the cards have audio recording and some allow two cards to be fitted in the same machine to build up to a 32 channel PC based DVR. PCI video capture cards and DVR cards plug into a spare PCI or PCI-E (pci express) slot in your computer and allow you to view and record standard analogue CCTV cameras as if you were using a dedicated Digital Video Recorder. Some of our capture cards will work with third party software like Active Webcam, iCatcher and Eyespy etc. and some are specifically suited to Zoneminder for Linux. Our PCI slot information page will help you to check if a card is compatible with your PC expansion slots.