來源：https://www.reference.com/technology/non-ecc-memory-2818893af696697c#
ECC是Error Correcting Code的縮寫。Non-ECC內存是指沒有錯誤檢測和糾正功能的計算機內存。Non-ECC內存普遍用於消費級計算機系統；ECC內存會用於服務器和科學計算。
內存糾錯在最敏感的科學應用和金融應用中才有必要支持。這是因爲，在這些應用中一丁點的數據毀壞都有可能導致不堪承受的後果。市面上絕大部分家用和小型商用計算機主板都不支持ECC內存。
到2014年爲止，平均內存出錯率爲：每1G內存連續運行一個月，出現一次內存錯誤。因爲家用和小型商用機器很少會長時間連續運行，所以基本上不會出現內存錯誤。即使這樣的小概率事件發生了，也可以通過系統重啓解決，因爲家用系統不需要不間斷運行。相反，金融和科學應用則需要不間斷運行，因此採用ECC內存來避免數據毀壞。
內存錯誤可以由自然界的背景輻射觸發，包括地球上已存的放射性同位素和源自超新星的宇宙射線。宇宙飛船上的內存出錯率要比地面上高得多，尤其是在發生太陽光耀和其它引起背景輻射增強的事件的情況下。
Non-ECC memory is computer memory that lacks error checking and correction functions. Non-ECC memory is the most common type of memory in consumer-grade computers; ECC memory is found in servers and scientific computing.
Memory correction is not needed except in the most sensitive scientific and financial applications. Even slight amounts of data corruption are unacceptable in these usage cases, so memory with error correction capabilities is used. Most commercially available motherboards designed for home and small business use do not function with ECC memory.
The average incidence of memory error is once per gigabyte of memory per month of uninterrupted operation, as of 2014. Because very few home and small business machines have significant uninterrupted uptime, there is little risk of a memory error. In the rare case that a memory error does occur, a system restart corrects the issue. Because home systems do not require constant uptime, restarting the machine is an acceptable solution. Financial and scientific applications have greater need for uninterrupted uptime, and use ECC memory to prevent memory errors as a result.
Memory errors are caused by natural background radiation, which comes from both radioactive isotopes found on earth and cosmic rays originating in supernovas. The occurrence of memory errors is much higher for computers aboard spacecraft, particularly during solar flares and other events that increase the incidence of background radiation.