yeah i just bought a computer with the 865 in it.....runs good whe u get it to work...keep in mind these are instuctions for a slack system so yours might vary but heres the general idea....
the gigabit controller works fine, im using 2.4.21 and the driver is in the kernel, its the only intel one in the gigabit section, works fine had now problems with it.
as for the SATA controller thats a different story....if u go with that then you need to do few things for it to work....but it does work. what u need to do is the following:
first u need to get a kernel image that has support for your silicon image controllor... i went with 2.4.21-ac4. in the kernel config under the IDE/ATA section enable PIIX support and silicon image support(not SIS). next enable basic scsi support, the only thing i had was 'scsi enabled' and nothing else. also since this is a install bootdisk, enable initrd and RAMDISK, should be in block devices. after all that is done go into the kernel .config (in the /usr/src/linux directory). jump down to the scsi section and add the following lines:
once that is done u can compile the kernel and use "make bzdisk" to make a boot floppy.....from there i guess it depends on your distro....
once i got everything working it i havent had any issues at all.