H3 series could support the following AM2/AM3/FX-1 socket if the socket layout is the same as the below Gigabyte GA-A75N (Hudson D3) Mini-ITX AMD Motherboard.
In this case, four heatpipes are utilized instead of six. Most Llano ITX board socket is vertical instead of horizontal which won’t work with HDPLEX heatsink system.
If the layout is like the following A75 motherboard, hdplex fanless heatsink system will NOT work on those.
ASUS F1A75-I Deluxe FM1 AMD A75 (Hudson D3) HDMI SATA 6Gb/s USB 3.0 Mini ITX AMD Motherboard
ASRock A75M-ITX FM1 AMD A75 (Hudson D3) HDMI SATA 6Gb/s USB 3.0 Mini ITX AMD Motherboard