Selecting motherboard is really simple. As name suggests "Motherboard" acts as a protective mother of CPU, RAM and other add on cards since these components stand firmly on motherboard.
Number of devices have been integrated on motherboard over a period of time. Now a days motherboard with onboard features is more popular in Branded PCs. Onboard integrated peripherals are offered by many branded PC manufacturers to provide you latest technology if you buy a system from a big computer manufacturer recently.
It is recommended to select motherboard with maximum number of ports preferably with 2 serial, 1 parallel and 4 USB ports. Most of recent devices have USB port. Also check upgradation options such as memory support and number of available PCI slots etc.
Technology changes so rapidly that manufacturers add new features such as serial ATA, USB 2.0 and RAID on motherboard to stay ahead of competition. Many manufacturers even provides FM radio on motherboard to survive in race making it fully entertainment machine.
Important Motherboard Tips:
1) Do survey by reading reviews on motherboards and then look for either same motherboard or compare it with it's competitors product in market.
2) Don't buy costliest motherboard if you are not going to use additional features. Always check cost to benefit ratio and make selection just by assessing utility value.
3) If you are dedicated gamer or fan of overclocking, verify whether space around CPU is spacious enough for you to install a larger heat sink-fan combination for cooling. Go for motherboard, which has facility to overclock FSB in steps of 1 MHz and core voltage adjustment.