FDIV bug

FDIV bug

(Floating Point DIVision bug) A flaw in early Pentium chips that, in certain cases, caused an erroneous result from the FDIV floating point division instruction. It surfaced in late 1994, and Intel eventually initiated a replacement program for all users of the chip.
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Like the Pentium FDIV bug of yesteryear, this was a real issue, but one that realistically only impacted a fraction of a fraction of buyers.
Why this matters: In the grand scheme of CPU "errata" or bugs, this one is fairly esoteric and really not worthy of being mentioned in the same paragraph as Intel's infamous 1994 FDIV bug. The FDIV bug would manifest itself in Microsoft Excel spreadsheets and was serious enough that Intel recalled the CPUs to the tune of millions of dollars.