After months of work, my linear power supply is almost complete.
This is a one box solution with 7 outputs:12Vx4 & 5Vx3. The toroidal transformer is a 300VA O-shape transformer made by Simon62:
Different outputs are designed for different PCs:
1 - 12V 5A - NAS (Atom 2800MT, 4T 3.5" WD Red) + My desktop PC (Haswell i3 35W TDP, SSD)
2 - 12V 3A - PC dedicated for CD ripping (AMD E2100 9W TDP, 2T 3.5" WD Red + CD-ROM)
3 - 12V 3A - PC dedicated for CAS (Celeron 1037u 18W TDP, SSD + 500G 2.5" WD Blue)
4 - 12V 3A - reserved
5 - 5V 3A - Network Hub
6 - 5V 1.5A - Fiber-Ethernet Media Converters
7 - 5V 1.5A - Power for hard drives of CAS PC.