VIA Embedded Architecture: Chipsets
  Chipset VIA CN700
VIA VT8237R Plus
VIA CN700
VIA VT8251
VIA CN800
VIA VT8237R Plus
VIA CN800
VIA VT8251
VIA CN896
VIA VT8251
Single Chip
VIA CX700 VIA CX700M/M2*
North Bridge Features TDP max 2.3W 2.3W 2.7W 2.7W 3W 3.5W 3.5W
DDR 266/333/400 MHz 266/333/400 MHz 266/333/400 MHz 266/333/400 MHz 333/400 MHz 333/400 MHz 333/400 MHz
DDR2 400/533 MHz 400/533 MHz 400/533 MHz 400/533 MHz 533/667 MHz 400/533 MHz 400/533 MHz
Max Memory Size 2GB 2GB 4GB 4GB 4GB 2GB 2GB
DRAM Data Width 64 bit 64 bit 64 bit 64 bit 64 bit 32/64 bit 32/64 bit
Integrated Graphics UniChrome Pro UniChrome Pro UniChrome Pro UniChrome Pro Chrome9 HC DX9  (DX9support) UniChrome Pro II UniChrome Pro II
MPEG2 Decoding Acceleration VLD, IDCT and Motion Compensation VLD, IDCT and Motion Compensation VLD, IDCT and Motion Compensation VLD, IDCT and Motion Compensation Motion Compensation VLD, IDCT, Motion Compensation and MP@HL VLD, IDCT, Motion Compensation and MP@HL
MPEG4 Decoding Acceleration N/A N/A N/A N/A N/A N/A ASP Level 5, GMC L0/L1 and 1/4-pixel MC
WMV9 Decoding Acceleration N/A N/A N/A N/A N/A N/A Yes
High Definition TV Encoder W/ VT1625 W/ VT1625 W/ VT1625 W/ VT1625 W/ VT1625 W/ VT1625 Integrated
ECC Support N/A N/A N/A N/A N/A Yes Yes
LVDS Transmitter W/ VT1636 Dual-ch LVDS Tx W/ VT1636 Dual-ch LVDS Tx W/ VT1636 Dual-ch LVDS Tx W/ VT1636 Dual-ch LVDS Tx W/ VT1636 Dual-ch LVDS Tx Integrated Integrated
DVI Transmitter W/ VT1632A DVI Tx W/ VT1632A DVI Tx W/ VT1632A DVI Tx W/ VT1632A DVI Tx W/ VT1632A DVI Tx Integrated Integrated
AGP 8X Extension Yes Yes N/A N/A N/A N/A N/A
PCI-E Extension N/A N/A x16 and x1 x16 and x1 x16 and x1 N/A N/A
Dual Independent Display Support Yes Yes Yes Yes Yes Yes Yes
Graphic Resolution (CRT) 1920 * 1440 1920 * 1440 1600*1200 1600*1200 1920*1440 1920*1440 1920*1440
Video Capture port N/A N/A N/A N/A N/A Yes Yes
3D Alpha Blending Yes Yes Yes Yes Yes Yes Yes
PIP N/A N/A N/A N/A N/A Yes Yes
Scaling Yes Yes Yes Yes Yes Yes Yes
Hardware Rotation N/A N/A N/A N/A N/A Yes Yes
Southbridge Features TDP max 1.8W 2.3W 1.8W 2.3W 2.3W - -
AC'97 Yes Yes Yes Yes Yes N/A N/A
High Definition Audio N/A Yes N/A Yes Yes Yes Yes
ATA/100/133 Yes Yes Yes Yes Yes Yes Yes
SATA Up to 150MB/sec transfer rate Up to 300MB/sec transfer rate Up to 150MB/sec transfer rate Up to 300MB/sec transfer rate Up to 300MB/sec transfer rate Up to 300MB/sec transfer rate Up to 300MB/sec transfer rate
RAID 0,1, JBOD 0,1,0+1,5, JBOD 0,1, JBOD 0,1,0+1,5, JBOD 0,1,0+1,5, JBOD 0,1, JBOD 0,1, JBOD
USB 2.0 8 ports 8 ports 8 ports 8 ports 8 ports 6 ports 6 ports
PCI 6 masters 6 masters 6 masters 6 masters 6 masters 4 masters 4 masters
PCI Express N/A 2x1 or 1x2 lane N/A 2x1 or 1x2 lane 2x1 or 1x2 lane N/A N/A
10/100Mbps Ethernet (MAC) Yes Yes Yes Yes Yes N/A N/A
ISA External Support External Support External Support External Support External Support External Support External Support
GPIO Yes Yes Yes Yes Yes Yes Yes
COM Port W/ VT1211 W/ VT1211 W/ VT1211 W/ VT1211 W/ VT1211 2 ports 2 ports

Note: CX700M2 has Macrovision support.