gv800 PIC-E v4,  2cards for 32ch
Specifications 
Input Type:  GV-800 D-Type: DB15 X 2  (PCI-E)
Video Input(s):  4, 8, 12, 16 Cams 
Audio Input(s):  4 Channels 
Total Recording Rate At 320 X 240 Resolution:  120 fps (NTSC), 100 fps (PAL) 
Display Rate:  120 fps (NTSC), 100 fps (PAL). 
Video Resolution - NTSC/PAL:  Full D1, Half D1, CIF 
Compression Format:  Geo MPEG4, Geo MPEG4 (ASP), Geo H264, Geo H264 V2 
GV-A16 Support  Yes 
GV-NET Card Support  Yes 
GV-NET/IO Card Support  Yes 
Dimensions (W x H)  GV-800 D-Type: 174 x 98 ( mm) / 6.85 x 3.86 (in) 
Installation Guide  D-Type (PCI-E)
Installing Two cards 
Note: GV-800 is currently not compatible with VIA series and ATI series chipset motherboards, and 64-bit Windows operating system. 
Minimum System Requirements For One Card 
OS Supported  Windows 2000 / Windows XP / Windows Server 2003 / Windows Vista
(Not support 64-bit version of Windows) 
CPU  Pentium 4-3.0 GHz with Hyper-threading 
RAM  Windows 2000 / XP: 2 x 512 MB Dual Channels
Windows Vista / Server 2003: 2 x 1 GB Dual Channels 
HDD  80 GB 
VGA  ATI Radeon X600
NVIDIA 6200 
DirectX  9.0c 
Minimum System Requirements For Two Cards 
OS Supported:  Windows 2000 / Windows XP / Windows Server 2003 / Windows Vista
(Not support 64-bit version of Windows) 
CPU:  Pentium 4-3.0 GHz Dual Core 
RAM:  2 x 1 GB Dual Channels 
HDD  160 GB 
VGA  ATI Radeon X1300 PCI-E
NVIDIA GeForce 7300 PCI-E 
DirectX  9.0c