Intel Pentium 4 SL5UJ 1.6GHz Socket 478 CPU 256KB Cache 400MHz FSB Willamette

Intel Pentium 4 SL5UJ 1.6GHz Socket 478 CPU 256KB Cache 400MHz FSB Willamette

A single-core desktop processor from Intel's Pentium 4 lineup, built on the Willamette core architecture. This CPU was used in consumer and business desktop systems from the early 2000s.

Specifications & What's Included

• Clock Speed: 1.6 GHz
• Socket Type: Socket 478 (mPGA478B)
• L2 Cache: 256 KB
• FSB: 400 MHz
• Core Voltage: 1.75V
• Manufacturing Process: 0.18 micron
• Single core processor
• CPU only — no heatsink, fan, or retention bracket included

Applications

Socket 478 Pentium 4 processors were compatible with Intel 845, 865, and i915 chipset motherboards. These CPUs were standard in desktop systems throughout the early-to-mid 2000s for general computing, office applications, and consumer-level tasks. This processor is now used primarily in retro computing builds, legacy system restoration, or compatibility testing for older platforms.