You call that mini? lol
How about these I have some of these. The aopens take a 19v laptop style charger for power.
(these are about the size of a mini mac, the 915 version even looks like one, I use the 915 case on the 945 and the 965 version. MAKE SURE YOU GET THE CARD THAT HOOKS THE HARD DRIVE AND DVD DRIVE TO THE MOTHERBOARD. Hard to find if it's missing.
Pentium M, two slots for ram laptop style, wifi slot laptop style, you can swap out the ram and cpu.http://www.ebay.com/itm/Aopen-Mini-PC-M ... 33a176a103
core duo or core 2 duo mobile processer, intel 945 chipset and graphics. You can swap out the ram(laptop style) and upgrade the cpu. http://www.ebay.com/itm/AOPEN-DIGITAL-E ... 4d3589e8e7
aopen 965 upgraded version of above. Better graphics.http://www.ebay.com/itm/A-open-PC-mp965 ... 3f51e4f907
aopen digital engine. Rugged case style like above.http://www.ebay.com/itm/AOpen-Digital-E ... 2a4d17341c
I have a mini itx build on here somewhere. The motherboard and cpu will run you under 25 bucks it takes mobile cpu, mobile ram, has 945 intel graphics onboard but has a full desktop pci x 16 slot for improved graphics take a standard desktop power supply.
also AMD has some kick butt little combos.
IF you get a M-itx motherboard in the AM1 socket you can get up to a 2.0 quad core that can be passively cooled with the right cooler. Good integrated graphics that can do light gaming. I think even titan fall on very low has been made to work. The mother boards can take a desktop power supply or laptop style. (not all of them but some can)
if you want the top of the line you can get on the FM2+ socket up to a 4.4 quad core and integrated graphics that can play skyrim on high settings.