Intel Celeron SL4NY 633MHz/128KB/66MHz/1.7V Socket 370 FC-PGA Processor CPU

Intel Celeron SL4NY 633MHz/128KB/66MHz/1.7V Socket 370 FC-PGA Processor CPU

The Intel Celeron SL4NY is a 633MHz Socket 370 FC-PGA processor based on Intel's Coppermine core, manufactured circa 2000. Running on a 66MHz front side bus with 128KB of on-die L2 cache at full core speed and a 1.7V core voltage, it is pin-compatible with Socket 370 motherboards supporting FC-PGA CPUs. Note: the current listing name incorrectly identified this chip as a Pentium III — the die label clearly reads Celeron, and the SL4NY sSpec is an Intel Celeron 633 designation.

Specifications & What's Included

• Brand: Intel
• Processor family: Celeron (Coppermine core)
• sSpec / OPN: SL4NY
• Clock speed: 633 MHz
• Front side bus (FSB): 66 MHz
• L2 cache: 128 KB (on-die, full-core speed)
• Core voltage (Vcore): 1.7V
• Socket: Socket 370 (FC-PGA)
• Country of manufacture: Malaysia
• Lot code (visible on label): Q045A655-0871
• Processor only — no heatsink or fan included

Applications

The Intel Celeron 633 targets the late-1990s to early-2000s Socket 370 desktop platform, used in budget and entry-level systems built around Intel 810, 815, and similar chipset motherboards from that era. The FC-PGA package replaced the earlier PPGA package and is compatible with a wide range of Socket 370 boards, including those that also supported Pentium III Coppermine processors at the same socket — though FSB and voltage compatibility should be confirmed for any specific board. These processors are primarily sought today for restoring or maintaining period-correct Socket 370 systems, vintage PC builds, and retro computing projects. The 66MHz FSB and 128KB L2 cache are the key differentiators from the contemporaneous Pentium III, which ran a 100 or 133MHz FSB with 256KB cache.