[ PENTIUM ERA PROCESSORS // IDENTIFIED CPU ]
Intel Celeron 300A (Mendocino)
Mendocino desktop Celeron, 1998; 300A Socket 370. 300 MHz; 66 MHz FSB; 128 KB on-die full-speed L2; 32 KB L1; PPGA Socket 370.

MODEL IDENTIFICATION: Intel Celeron 300A (Mendocino). Match full model suffix, stepping and package to the physical item and cited documentation.
Recorded specifications
| Cataloged model | Intel Celeron 300A (Mendocino) |
|---|---|
| Era / family | Mendocino desktop Celeron, 1998; 300A Socket 370. |
| Model specifications | 300 MHz; 66 MHz FSB; 128 KB on-die full-speed L2; 32 KB L1; PPGA Socket 370. |
| Compatibility | Socket 370 board/BIOS supporting Mendocino and PPGA electrical profile. |
| Variants / limits | “A” is Mendocino with L2; Covington 300 lacked L2. |
Compatibility and variants
- Socket 370 board/BIOS supporting Mendocino and PPGA electrical profile.
- “A” is Mendocino with L2; Covington 300 lacked L2.
- Check system-vendor CPU support, board revision, firmware minimum, package, memory, cooling and power before installation; similar socket naming does not prove compatibility.
Service and archival notes
Record sSpec/package/FSB; inspect pins and retention.
Archive the complete marking/OPN/sSpec, stepping, physical condition, tested host revision, firmware, memory population, cooling, and test conditions. Distinguish published limits from measurements.
Sources & further reading
- Intel ARK model lookup — Intel Celeron 300A (Mendocino)Official Intel model specification search for the cataloged product.
- Intel technical archive — Intel Celeron 300A (Mendocino) product familyArchived Intel-authored processor data sheets/manuals; match model and revision.
- Intel processor-history reference — Intel Celeron 300A (Mendocino)Historical context for Intel processor generations; use the exact data sheet for limits.
- Bits und Bolts — Celeron 300A: The best CPU you could buy in 1998!Independent video review; treat as supplementary context, not primary manufacturer documentation.
Use the matching manufacturer data sheet revision and platform vendor’s CPU list for final fit decisions.