1998 research cohort / CPU
AMD · model variant
Candidate · no owner discrepancy decisionAMD-K6-2 processor 400 MHz is recorded in the 1998 CPU research cohort under AMD. The current display name and classification are normalization proposals.
AMD addresses demand for higher speed and strategic customer requirements
Intended users: Microsoft Windows PC customers and OEMs
Engineering response: 400 MHz AMD-K6-2 with 3DNow! technology
AMD press release dated January 13 1999 filed as Form 8-K exhibit · lines 62-69
AMD reports introduction and volume shipment of 400 MHz and says demand exceeded supply.
Retrospective company statement; no comparable independent benchmark found.
Comparable benchmark evidence has not been established for this record. Missing results do not imply poor performance.
The year above is a research-cohort label. Announcement, production, shipment and retail availability are distinct events.
Advanced Micro Devices Inc. is normalized to AMD; this is retained as a speed-grade variant beneath the separately recorded AMD-K6-2 family. Quarter precision is preserved without inferring a day or month.
Advanced Micro Devices Inc. · lines 27-32, 62-69
AMD's January 13, 1999 filed release reports Q4 ended December 27, 1998 and states that 366, 380, and 400 MHz versions were introduced and shipped in volume; hundreds of thousands of 400 MHz processors shipped.
Exact introduction and first-shipment dates; package and ordering-part-number identity; retrospective company-controlled evidence. Quarter precision requires later typed-event/date-precision support because the current product_details check has no quarter value.
No owner discrepancy decision is recorded. This does not mean there are no unresolved issues.
The AMD-K6-2 family and speed-grade records overlap intentionally but are different granularities; the family must not be counted as an additional speed-grade SKU.
Audit source · lines 52-69
AMD states a family introduction on May 28 and shipment volume but does not enumerate launch speed grades.
Follow-up: Retain the family as a family-level candidate; represent 350 and 400 as variants only when their quarter evidence is kept separate.
The current verification correctly avoids copying the family May 28 date onto the 350 or 400 variants; this remains a high-risk import guardrail rather than a present data error.
Audit source · lines 30-35; 48-75
AMD gives Q3 timing for 350 MHz while the family date is earlier; the family date does not establish the variant date.
Follow-up: Require typed event rows or explicit variant timing before normalization; retain quarter precision.
The AMD-K6-2 family and four speed-grade records intentionally overlap across granularities; the family must not be counted as a fifth speed-grade record or used to infer an exhaustive launch-SKU list.
Audit source · lines 52-69
AMD states a May 28 family introduction and quarterly shipment totals but does not enumerate the family launch speed grades.
Follow-up: Retain the family as a family-level candidate and each speed grade only as separately evidenced variants; do not use the group as a count of five comparable SKU claims.
The exact May 28 AMD-K6-2 family date cannot be inherited by any speed-grade candidate. The 350 MHz variant is Q3 evidence and the 366 MHz 380 MHz and 400 MHz variants are Q4 evidence only.
Audit source · lines 27-32 and 62-69
AMD's Q4 filing identifies 366 MHz 380 MHz and 400 MHz versions as introduced and shipped in volume during Q4; it does not supply an exact date.
Follow-up: Keep the family exact date and each speed-grade interval separately typed; reject any normalization that converts quarter evidence to day or month precision.
All four AMD-K6-2 speed-grade timing claims are manufacturer-controlled retrospective quarter statements. They support bounded 1998 intervals but not exact first-shipment dates or orderable identities.
Audit source · lines 30-35 and 48-75
The Q3 filing supports the 350 MHz interval while the Q4 filing supports 366 MHz 380 MHz and 400 MHz intervals; neither resolves exact dates.
Follow-up: Retain quarter precision and flag independent contemporary or channel evidence as optional follow-up rather than filling missing dates.
These notes preserve the state at intake. Later verification is shown under Release evidence above; an original note saying verification had not occurred is not the current assessment.
Advanced Micro Devices Inc. ·
Imported source reference; independent verification has not occurred.
Advanced Micro Devices Inc. ·
Imported source reference; independent verification has not occurred.
Retrospective January 1999 source confirms 1998 introduction and volume shipments but not an exact date
Proposed parent family: AMD-K6-2 processor with 3DNow! technology