Tested. Working perfect. See photo. With CPU i486DX2 66Hz, 16MB FPM RAM & cooler
 
Chipset SiS 85C496/497 (486-VIP 486 Green PC VESA/ISA/PCI Chipset)
Socket Socket 3 (PGA237)
FSB speeds 25MHz33MHz40MHz50MHz
Form factor Baby AT (max 220 x 330 mm)
Cache 256K
Max RAM size 256MB
RAM types 72-pin FPM72-pin EDO
PSU connector AT (6-pin P8 + 6-pin P9)
I/O ports
1x AT Keyboard
1x Floppy interface
2x IDE interface
1x PS/2 mouse
1x Parallel
2x Serial
Expansion slots
4x 16-bit ISA
3x 32-bit PCI