It is easy to confuse an 8 pin 12 volt cable and an 8 Pin PCI Express power connector in an ATX system. ATX is the most popular PC form factor in the computing world.
ATX is standardized. That means that by measuring sizes of the system you can tell which one it is.
The ARP590 supports of ATX and Extended ATX motherboards means dual processor solutions for your mobile coputing needs. The ARP590 series portable platform provides a totally integrated solution for mobile computing applications requiring industrial ruggedness, robustness and system configurations found in desktop workstations. The chassis supports Micro-ATX, ATX, and Extended ATX form factor motherboards. This means the latest motherboard designed for desktop PC, workstation, or server are available to you to customize it with your processor and peripheral options.
ATX is a form factor. It does not dictate a specific chipset; anything from the now ancient 440BX to a Q57 can be used in an ATX system.
The three form factors for desktop system boards are: ATX, and BTX and NLX
ATX (Advanced Technology Extended) is a combination of standards for computer system power supplies and chassis dimensions. It was developed as a replacement for the once-common AT form factor.
P1
intel pentium campany
There are not really any advantages with a ATX over a Micro ATX just Micro ATX is smaller and ATX is larger
Mini-ITX. It is much smaller than ATX variants.
No, that motherboard is an ATX form factor motherboard and thus incompatible (not to mention too large) to install on that system.
ATX
flex ATX above that is the micro ATX