2003-07-08 Via PT800 Pentium 4 chipset with support for the 800 MHz bus. Earlier known as PT400. Uses the 8237 south bridge. Will also be available in a PM800 version with integrated UniChrome graphics available in Q4.
2003-11-07 Via PT880 Pentium 4 chipset previously known as PT600 supporting the 800 MHz bus. Identical to PT800, except for an added second DDR400 channel. Includes QBM 533 support, which seem to be two DDR channels with one delayed by 90 degrees. Uses the VT8237 south bridge. There will also be a PM880 version with added UniChrome graphics launched in 04-Q1.