At msfn.org, there is a big community of hackers, doing this for profit:
http://www.msfn.org/board/forum/8-windows-9xme/
But in a Nutshell:
- Get a carefully selected AMD 970 board (i.e. MSI 970 Krait SLI - the secondary PCIe slot better be faster then PCIe 2.0 4x)
- Install an AMD FX of your chioce
- Install a fitting compatible old GPU (i.e. a ATI x800 PCIe 265MB) in the first slot, connect via VGA
- install an SSD (120GB max., format with FAT32 via a XP boot CD) on port 5 or 6
- install a PCIe Gigabit NIC with chipset Realtek 8111B (optional, but helpful. If you don't need LAN for W98SE, use the oboard LAN later on)
- Copy W98SE installation CD and all required software for W98SE to the Disk (veeery important)
- install W98SE
- install the "latest" patches by MS (IE, DX)
- install drivers for W98SE
- install community-servicepacks (SP3.6e at the moment)
- install community universal USB2-driver "New USB" (NUSB 3.6 at the moment - for mouse, keyboard, storage, not for any other device)
- add a Soundblaster Audigy (1 or 2) PCI for EAX-fun and profit.
Done, this will run. Fast. As Hell.
Then, install a fast GPU of your choice in the secondary PCIe-Slot (i.e. a GTX 950), connect to i.e. DVI-D, DisplayPort or HDMI.
Install a fast and big SSD on port 1 to 4.
Install W10. This will use the old GPU at first.
Install all patches first.
Install the driver for your fast GPU last, reboot. The system will seem to hang (but does not, in fact). You will have to switch off and on the monitor, once the driver takes over...
Einjoy your modern gaming Rig.
Don't use this for everyday chores (browsing, work, etc.), as this uses too much power in Idle.
But as a secondary machine, meant for playing games from all periods, this is perfect. Or i.e for guests for LAN-games.