Hardware
The iPAQ had very few limitations on upgradability; hard drives, RAM, CPU and 'Multi-Bay' drives can be readily interchanged, although the iPAQ did not contain sockets for expansion cards.
It featured an interchangeable 'Multi-Bay' slot that could accept a 3.5 inch LS SuperDisk drive (the only way to read a floppy disk - standard Multi-Bay floppy drives do not work), optical drives, or a secondary hard disk device. The slot was the same as those found on many Compaq Armada and many other HP/Compaq laptop computer systems.
By a method of convection for cooling, these computers are commonly found in office environments due to their low noise (dB) output.
The iPAQ ran on either an Intel Pentium III processor or on an Intel Celeron processor; ranging from 500 MHz to 1 GHz processor in a PGA370 socket.
The internal RAM was upgradable to 512 MBs of 100 MHz 168pin SDR SDRAM. Strangely enough, the BIOS in the iPAQ actually prevents the system from booting if there is more than 512 MBs of RAM installed (a message displays during POST instructing the user to decrease the amount of RAM in the system to no more than 512 MBs). The reason behind this forced RAM limitation is unknown.
The first version came in two different models, "Legacy free" which had no parallel, serial, or PS/2 ports and instead 3 additional USB ports on the back; and the traditional one which included the parallel, serial, and PS/2 ports but only had USB ports on the front. The second version had different styling and had a backpack which added the "legacy" ports. Both models would make good headless servers, except that a bug or oversight in the BIOS requires that a keyboard must be connected in order for the computer to boot. This can be bypassed with a couple of BIOS tweaks
iPAQ Desktops were typically sold with Windows 98 or Windows 2000 already installed. They are easily upgraded to Windows XP and can also technically run Windows Vista and Windows 7 despite the low RAM limit. In the case of Windows 7, the only way to utilize the onboard video chip is to install the Intel815 Windows XP Drivers.
Read more about this topic: IPAQ (desktop Computer)
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