PCI BUS MASTER/ GIGABYTE MB

i’m having a similar problem to a question addressed on here recently… i have a Gigabyte P4 Titan DDR motherboard and i use both win98 and winxp. in win98 under “unknown devices” are a pci bus master which is missing a driver and two “unknown” devices, which are also, obviously, missing drivers… the 98 runs nearly three times slower than xp with the same application (logic). does anyone know where i can get the pci bus driver and/or what the two unknown devices are?