ECC
ECC (Error Checking and Correction Code) is an electronic method for checking the integrity of data stored in DRAM. ECC is more elaborate than parity since it can detect multiple bit errors and can locate and correct single bit errors. ECC usually uses three bits per byte of data, compared to one bit used on parity.

這是在創見的網站上找到的。
當機的因素有很多，像是電壓不穩、power不好、散熱不佳、使用者的因素.....。