Intel Pentium III Katmai core

Previous generation		Related core	Next Generation
Deschutes » 0.25 micron » 100 MHz FSB Pentium II	Katmai » 0.25 micron » 133 MHz FSB » SSE instructions Pentium III	Tanner » Up to 2 MB L2 cache » L2 cache runs at the CPU speed » Works in 4-way systems Pentium III Xeon	Coppermine » 0.18 micron » 256 KB L2 cache Pentium III Mobile Pentium III Celeron Mobile Celeron

The Katmai core was introduced on Feb 26, 1999. This core is based on P6 microarchitecture.

New core features:

• 133 MHz Front Sub Bus
• SSE instructions

Pentium III processors with Katmai core can be identified by:

• Part number: part number contains "80525P", "80525U" or "80525H".
  An example: 80525PY550512.
• CPU ID: First two digits of CPU identification numbers of Katmai processors are "67". Please note that Pentium III Xeon microprocessors with Tanner core have the same CPU IDs.

	Desktop Pentium III
Manufacturing technology	0.25 micron
Frequency	450 MHz - 600 MHz
Fastest processor	80525PY600512 (BX80525U600512) - 600 MHz, 100 MHz FSB 80525PZ600512 (BX80525H600512) - 600 MHz, 133 MHz FSB
Front-side bus	100 MHz 133 MHz
L2 cache	Backside 512 KB running at 1/2 of processor speed
Package	Single Edge Contact Cartridge 2
Socket	Slot 1