Intel BX80532RC2500B Celeron Processor - 2.5GHz, Socket 478

The Intel Celeron BX80532RC2500B is a 2.5 GHz processor based on Intel's NetBurst microarchitecture, originally released as a budget alternative to the Pentium 4. It uses the Socket 478 (mPGA478B) form factor and communicates with the chipset over a 400 MHz front side bus. With just 128KB of L2 cache, it was positioned firmly at the entry level of Intel's lineup, designed for basic computing tasks such as document editing, email, and light web browsing rather than demanding applications or multitasking.

Today, this processor is primarily relevant for users maintaining or restoring legacy systems that require a Socket 478 CPU. Whether it's keeping an older industrial machine running, repairing a vintage PC, or building a period-correct retro system, the Celeron 2.5GHz fills a specific and increasingly hard-to-source gap. The boxed retail version includes Intel's stock heatsink and fan, which provides adequate cooling for the processor's modest thermal output. Prospective buyers should ensure they have a compatible Socket 478 motherboard with a 400 MHz FSB-capable chipset before purchasing.