AMD 785g, Onboard LAN working, in windows ME. USB2.0 ports, PS/2 ports, pci and pcie slots. onboard SATA kinda works (in IDE mode it runs in msdos compatibility mode as a generic storage controller) fix with promise ATA133 pci card and PATA IDE ATA133 SSD. onboard video is sufficient for setup (16 color 640x480) (Fix with X300 series pcie or PCi 7000) onboard audio is hdac97, so fix with soundblaster pci.
(DO NOT connect cdrom to the ATA133 PCI card, except during initial install. it slows the card terribly and will horribly bottleneck the SSD.)
Complete the install then disconnect cdrom, connect a wireless AC to gigabit ethernet bridge to the LAN port with a length of cat6, and install all updates and hotfixes, then install a usb DVD drive to have a working optical drive.
Disable onboard gpu and AC97 hdaudio in bios to free up IRQ's, make sure boot mode is set to legacy BIOS only, and install only a single 1gb stick (or 512m if anyone makes one) of ddr3. use an OPTERON CPU. A FX series chip might work but have not tested that. I only tested this with an Opteron 3380 as I have water cooling and it is a real pain to take it all off and unmount the mb just to swap cpu's. Limit memory with setup switches as usual, then edit system INI appropriately once install is complete. make sure all usb controllers are set to legacy usb support, and 2,0 mode with 1.1 compatibility fallback enabled. use a DVI converter to get HDMI out from the card's DVI port. (video only no audio) and connect external speakers to the soundblaster PCI card.
what doesnt work: USB3.0, HDac97 audio, onboard Radeon HD8xxx graphics (except basic 16 color mode) R9 390x (replaced it with PCIe x300 series) SATAIII (set to IDE mode it sort of works, generic IDE controller in msdos compatibility mode). Cool and Quiet. (Use K8 powernow driver to get it working). and of course, only one core is used.