List of Intel Pentium III microprocessors Desktop processors "Coppermine" (180 nm)

| Model_Number | Frequency | L2_Cache | Mult | Voltage | Socket | Release_Date | Part_Numbers |
|---|---|---|---|---|---|---|---|
| PentiumIII500E | 500MHz | 256 KB | 5× | 1.6 V | Socket 370 | October 25, 1999 | RB80526PY500256 |
| PentiumIII500E | 500MHz | 256 KB | 5× | 1.6 V | Slot 1 | October 25, 1999 | 80526PY500256 |
| PentiumIII533EB | 533MHz | 256 KB | 4× | 1.65 V | Socket 370 | October 25, 1999 | RB80526PZ533256 |
| PentiumIII533EB | 533MHz | 256 KB | 4× | 1.65 V | Slot 1 | October 25, 1999 | 80526PZ533256 |
| PentiumIII550E | 550MHz | 256 KB | 5.5× | 1.6–1.7 V | Socket 370 | October 25, 1999 | RB80526PY550256 |
| PentiumIII550E | 550MHz | 256 KB | 5.5× | 1.6–1.7 V | Slot 1 | October 25, 1999 | 80526PY550256 |
| PentiumIII600E | 600MHz | 256 KB | 6× | 1.7–1.75 V | Socket 370 | October 25, 1999 | RB80526PY600256 |