Intel Celeron SL6BC 1.70GHz 128KB 400MHz FSB 1.75V Socket 478 CPU Processor

Intel Celeron SL6BC 1.70GHz 128KB 400MHz FSB 1.75V Socket 478 CPU Processor

The Intel Celeron SL6BC is a 1.70GHz single-core desktop processor built on Intel's Socket 478 (mPGA478) platform. This is the Northwood-based Celeron core, featuring 128KB of L2 cache and a 400MHz front side bus, running at a core voltage of 1.75V. The sSpec number SL6BC identifies this as a specific production stepping of the Celeron 1.7GHz for direct motherboard compatibility matching.

Specifications & What's Included

• Brand: Intel
• Processor Family: Celeron
• sSpec Number: SL6BC
• Clock Speed: 1.70 GHz
• L2 Cache: 128 KB
• Front Side Bus (FSB): 400 MHz
• Core Voltage: 1.75V
• Socket: Socket 478 / mPGA478
• Number of Cores: 1
• Country of Manufacture: Costa Rica (visible on label)
• Processor only — no heatsink, fan, or retention bracket included

Applications

The Socket 478 Celeron line was introduced in the early 2000s as Intel's value-tier desktop processor, targeting budget desktop PCs and entry-level workstations built around Socket 478 motherboards using chipsets such as the Intel 845 and 865 series. These processors are still sought after for maintaining and repairing legacy Socket 478 systems — desktop PCs from roughly 2002–2004 that rely on this socket and FSB standard. The SL6BC stepping is a commonly referenced sSpec for direct motherboard compatibility lookups, making it a practical drop-in replacement for systems where the original CPU has failed. Socket 478 systems of this era typically ran Windows XP or early Linux distributions and are occasionally kept in service for dedicated industrial control applications, point-of-sale terminals, or retro computing use.