Feature VIA PT890 VIA PT880 Ultra VIA PT880 Pro VIA P4M900 VIA P4M890 VIA PM800 VIA P4M800 Pro
North Bridge              
Processor Support Intel® Core™2 Duo, Pentium® 4 and Celeron™ processors Intel® Core™2 Duo, Pentium® 4 and Celeron™ processors Intel® Core™2 Duo, Pentium® 4 and Celeron™ processors Intel® Core™2 Duo, Pentium® 4 and Celeron™ processors Intel® Core™2 Duo, Pentium® 4 and Celeron™ processors Intel® Pentium® 4 and Celeron™ processors Intel® Pentium® 4 and Celeron™ processors
Hyper Threading Support Yes Yes Yes Yes Yes Yes Yes
Front Side Bus 1066 / 800 / 533 / 400MHz 1066 / 800 / 533 / 400MHz 800 / 533 / 400MHz 1066 / 800 / 533 / 400MHz 1066 / 800 / 533 / 400MHz 800 / 533 / 400MHz 1066 / 800 / 533 / 400MHz
Bus Architecture Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous Asynchronous
Memory Support StepUp™ - single Channel DDR400/333/266
DDR2 667/533/400
SDRAM w/ECC		 StepUp™ - Dual Channel DDR400/333/266
DDR2 533/400
SDRAM w/ECC		 StepUp™ - Dual Channel DDR400/333/266
DDR2 533/400
SDRAM w/ECC		 StepUp™ - Single Channel DDR400/333/266
DDR2 533/400
SDRAM w/ECC		 StepUp™ - Single Channel DDR400/333/266
DDR2 533/400
SDRAM w/ECC		 FastStream64™ - Single Channel DDR400/333/266 SDRAM w/ECC DDR2 533,400 DDR400/333/266 SDRAM w/ECC
Max. Memory 4GB 4GB 4GB 4GB 4GB 3GB 2GB
External Graphics

PCI Express Graphics x16
PCI Express x1

 AGP 8X/4X
PCI Express x4		 VIA Universal Graphics Interface
•AGP 3.0 (AGP8X)
•PCI Express		 PCI Express x16 PCI Express x16 AGP 8X/4X AGP 8X/4X
Internal Graphics N/A N/A N/A VIA Chrome9™ IGP VIA UniChrome™ Pro IGP VIA UniChrome™ Pro IGP VIA UniChrome™ Pro IGP
Video/Display N/A N/A N/A MPEG2 decoder HDTV output MPEG2 decoder HDTV output MPEG2 decoder HDTV output MPEG2 decoder HDTV output
North/South Bridge Link 8X V-Link (533MB/s) Ultra V-Link (1066MB/sec) Ultra V-Link (1066MB/sec)

8X V-Link (533MB/s)

8X V-Link (533MB/s)

 Ultra V-Link (1066MB/sec)

8X V-Link (533MB/s)

*RAID Level 0+1 requires four Serial ATA drives; support for the two additional drives can only be implemented with two external Serial ATA ports enabled through a SATALite PHY.