CPU L2 Cache ECC Checking
Common Options : Enabled, Disabled
Quick Review
This BIOS feature enables or disables the L2 (Level 2 or Secondary) cache's ECC (Error Checking and Correction) function, if available.
Enabling this feature is recommended because it will detect and correct single-bit errors in data stored in the L2 cache. As most data reads are satisfied by the L2 cache, the L2 cache's ECC function should catch and correct almost all single-bit errors in the memory subsystem.
It will also detect double-bit errors although it cannot correct them. But this isn't such a big deal since double-bit errors are extremely rare. For all practical purposes, the ECC check should be able to catch virtually all data errors. This is especially useful at overclocked speeds when errors are most likely to creep in.
So, for most intents and purposes, I recommend that you enable this feature for greater system stability and reliability.
Please note that the presence of this feature in the BIOS does not necessarily mean that your processor's L2 cache actually supports ECC checking. Many processors do not ship with ECC-capable L2 cache. In such cases, you can still enable this feature in the BIOS but it will have no effect.
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