| intel Pentium III / III-S / Celeron Processor Part Mark | 
        
        
          | RB - Package type | 
          RB - Boxed retail 
    FV -  
    none - Bulk / OEM / Tray | 
        
        
          | 80526 - CPU type | 
          80525 - PIII Katmai/Tanner 0.25µm 
    80526 - PIII Coppermine/Cascades 0.18µm | 
        
        
          | P - Product code | 
          PX - Bulk/OEM/Tray CPU w/ 66MHz FSB 
    PY - Bulk/OEM/Tray CPU w/ 100MHz FSB 
    PZ - Bulk/OEM/Tray CPU w/ 133MHz FSB 
    P - Retail boxed CPU 
    RX - ??? 
    RY - ??? | 
        
        
          | 667 - core frequency | 
          core speed in MHz | 
        
        
          | E - Special attributes | 
          A - Pentium III w/ 100MHz FSB 
    B - Pentium III w/ 133MHz FSB 
    D - Pentium III w/ FCPGA packaging 
    E - Coppermine core 
    F - Processor suitable for dual configurations 
    G - Pentium III w/ 256KB cache support 
    H - Pentium III w/ 512KB cache support | 
        
        
          | 128 - internal L2 cache | 
          128 - 128KB 
    256 - 256KB 
    512 - 512KB 
    1024 - 1024KB | 
        
        
          | 66 - FSB | 
          66MHz 
    100MHz 
    133MHz | 
        
        
          | 1.65V - Vcc | 
          1.40-2.20V | 
        
        
          | A4 - Stepping | 
          A4 | 
        
        
          | Q014A264 - FFFFFFFF | 
          F manufacturing plant code 
    0 - San Jose, Costa Rica (A6/T6) 
    1 - Cavite, Philippines 
    3 - Costa Rica 
    6 - Chandler, Arizona (A4) 
    8 - Leixlip, Ireland 
    9 - Penang, Malaysia (A1) 
    A - ??? 
    C - ??? 
    E - Philippines 
    I - ??? 
    L - Malaysia 
    Q - Malaysia 
    R - Manila, Philippines 
    Y - Leixlip, Ireland | 
        
        
          | F Year of manufacture (6 - 1996, ...) | 
        
        
          | FF Week of manufacture | 
        
        
          | FFFF FPO# (test lot traceability number) | 
        
        
          | 0239 - DDDD | 
          serialization code | 
        
        
          | Country of assembly | 
          MALAY 
    PHILIPPINES 
    COSTA RICA 
    IRELAND | 
        
        
          | SZZZZ - S-spec | 
          S-spec | 
        
        
          | QZZZZ - S-spec | 
          S-spec (engineering samples)  | 
        
        
          | Product Code | 
          RH - Mobile Celeron OEM 
            BXM - Boxed Mobile Pentium III / Celeron 
            KP - Mobile Pentium III Substitute Tray |