The characteristics are as follows:
1, the network card or sound card is bad, in addition to its own can not be used, but also may lead to slow system operation, crash and so on.
2, the south bridge chip is poor, will lead to USB can not be used, running the program does not respond, restart or crash.
3, if there is a problem in the north bridge, the memory cannot be detected (currently AMD, Intel motherboard, memory are calculated by the CPU); Video card and VGA functions are not available.
4, IO chip is poor, light PS2 keyboard and mouse has no effect, heavy can not boot.