Why don’t PCs use error correcting RAM? “As a result of Intel,” says Linus



Enlarge / We have been having fun with a kinder, gentler Linus Torvalds for the previous couple of years… however that does not imply he stopped having opinions. (credit score: aaltouniversityace / kjerish)
This Monday, Linux kernel creator Linus Torvalds went on a annoyed rant concerning the lack of Error Correcting Checksum (ECC) RAM in client PCs and laptops.
… the misguided and arse-backwards coverage of “shoppers do not want ECC”, [made] the marketplace for ECC reminiscence go away.
The arguments in opposition to ECC have been all the time full and utter rubbish. Now even the reminiscence producers are beginning to do ECC internally as a result of they lastly owned as much as the truth that they completely need to.
In case you’re not aware of ECC RAM, it is most likely since you do not construct or spec devoted servers utilizing server-grade CPUs and motherboards—which, sadly, is about the one place you really discover ECC. In a nutshell, ECC RAM features a tiny quantity of additional reminiscence used for detection and correction of errors.
Reminiscence errors and chance
In most trendy implementations, this implies for each 64-bit phrase saved in RAM, there are eight checking bits. A single bit error—a Zero flipped to 1, or a 1 flipped to 0—might be each detected and corrected routinely. Two bits flipped in the identical phrase might be detected however not corrected. Three or extra bits flipped in the identical phrase will most likely be detected, however detection just isn’t assured.Learn eight remaining paragraphs | Feedback



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