PC Hardware in a Nutshell, 3rd Edition

Pentium II

First-generation Pentium II processors shipped in 233, 266, 300, and 333 MHz versions with the Klamath core and a 66 MHz FSB. In mid-1998, Intel shipped second-generation Pentium II processors, based on the Deschutes core, that ran at 350, 400, and 450 MHz and used a 100 MHz FSB. Pentium II processors have 512 KB of L2 cache that runs at half internal CPU speed versus 256 KB to 1 MB of full CPU speed L2 cache in the Pentium Pro. Pentium II processors use a Single Edge Contact connector (SECC) or SECC2 cartridge, which contains the CPU and L2 cache (see Figure 4-2). The SECC/SECC2 package mates with a 242-contact slot connector, formerly known as Slot 1, which resembles a standard expansion slot. Klamath-based processors run at 2.8 volts and are built on a 0.35μ fab. Deschutes-based processors, including all 100 MHz FSB processors and recent 66 MHz FSB processors, run at 2.0 volts and are built on a 0.25μ fab. Excepting FSB speed and fab process, all Slot 1 Pentium II processors are functionally identical. As of July 2003, Pentium II processors remain in limited distribution, but they are obsolescent.

Figure 4-2. Intel Pentium II processor in the original SECC package (photo courtesy of Intel Corporation)

For additional information about Pentium II processors, including detailed identification tables, visit http://developer.intel.com/design/pentiumii/. For information about ...