Zotac's mini-ITX Ion
Wow, since I started this thread, more and more mini ITX boards are available. Zotac's been kicking ass in this area and will soon have NINE different mini-ITX boards ranging from AMD/Intel socketed to Ion-with-Atom. Wow. Just wow.
Originally posted by: coolVariable
there are no cases for itx (or mini-dtx for that matter) and the few are way too expensive.
E.g. Chenbro's WHS case ... $200 are f*ing kidding me?
I've seen mini-ITX cases for sale as cheap as around $40 shipped from Newegg, but they aren't very good IMO (lousy and loud PSUs, lack of ventilation). The thing is that mini-ITX as a form factor started out more as industrial boards and have just recently (past year?) become popular for desktop use. Take whatever ATX case is your favorite right now. Now, figure out how long after ATX usurped AT as a form factor before your favorite case was released? I think mini-ITX as a form factor has come a long way in the past year, and can only get better.
Originally posted by: zerogear
How much difference in power usage is ITX vs uATX/ATX?
None. Form factors don't specify power usage, just size/layout. With that being said, how many ATX Atom boards are there? :laugh: The small size of mini-ITX lends itself to certain applications, such as low powered systems.
Now, something important to know is power supply efficiency at low outputs. Read the power draw section of the Anandtech article I linked above. Note how the Zotac setup drew less power than the Intel setup, even though the GeForce 9400 in the Ion platform draws more power than the 945GC chipset. Why do you think that is?

The Intel setup used a normal ATX power supply while the Zotac setup used a special low wattage setup. This way the power supply can work in the range where it is most efficient, unlike slapping your favorite 80+ certified 500W PSU on these things. Yeah, where's your 80% efficiency now?!?!
Normal setups can be very efficient if used with a power supply such as the
PicoPSU. Since most power supplies are at their highest efficiency at around 40-60% output, a setup with an Atom (maybe Ion platform) and a couple hard drives would be in the perfect range for these low output PSUs. Most PSUs plummet in efficiency below 20% output, so your 80+ 500W PSU may be only 50% efficient putting out 50W while an 80W PicoPSU will be around 90% efficient with the same platform. That means power draw from the wall of 55W for the PicoPSU versus 100W with the ATX PSU.
Note that I'm making up the numbers here, but it was intended to be a generalization.
Originally posted by: fatpat268
Only complaint with mini-itx though, is if you want a small system, most of them are loud as hell.
That's because mini-ITX has its roots in embedded/industrial systems. Give it time. A calendar year ago what mini-ITX boards did we have to choose from compared to what we have now?