ECC memory error detection

ECC (error correcting code) is a method for detecting and, if possible, subsequently correcting memory errors. Errors in these areas can severely limit the performance of an IT system. There are two types of single-bit memory errors: Fatal Errors and Recoverable Errors. Serious errors are caused by factors such as large fluctuations in voltage, temperature or stress on the memory. Recoverable errors occur when data is read differently than originally intended. This can be caused by voltage fluctuations on the motherboard, radiation, etc., which change bits in memory. Since the bits retain their programmed value in the form of an electrical charge, this type of disturbance can change the charge of the memory bit, thereby causing an error.