GeoVision GV-2008 Hardware Compression Card Card - DB15 x 2 (Video and Audio), 8 Cam Video Input, 240fps (NTSC)/ 200fps (PAL) Recording Rate, 8 Channel Audio Input, Video Resolution: NTSC - 720 x 480, 720 x 480 De-interlace, PAL - 720 x 576, 720 x 576 De-interlace, Compression Format: S/W - Geo MPEG4, Geo MPEG4 (ASP), Geo H264, H/W - MPEG4/MPEG2, Built-in I/O, Hardware Watchdog, NOT compatible with VIA and ATI chipset based motherboards, if installing two GV-2008 cards ensure that that the PC power supply is 400W or above