Intel SL6RZ Pentium 4 2.40GHz 512KB 533MHz FSB Socket 478 CPU Processor

Intel SL6RZ Pentium 4 2.40GHz 512KB 533MHz FSB Socket 478 CPU Processor

The Intel SL6RZ is a Pentium 4 desktop processor running at 2.40 GHz, built on Intel's 0.13-micron Northwood core. It features 512 KB of L2 cache and a 533 MHz front side bus, and fits the Socket 478 (mPGA478B) interface found on a wide range of desktop motherboards from that era.

Specifications & What's Included

• Brand: Intel
• sSpec Code: SL6RZ
• Processor Family: Pentium 4 (Northwood core)
• Clock Speed: 2.40 GHz
• Front Side Bus (FSB): 533 MHz
• L2 Cache: 512 KB
• Socket: Socket 478 (mPGA478B)
• Lithography: 0.13 micron
• Number of Cores: 1
• Thermal Design Power (TDP): 53.7 W
• Country of Manufacture: China (per label)
• Included: CPU only — no heatsink, fan, or retention bracket

Applications

The Pentium 4 Northwood was Intel's mainstream desktop processor from roughly 2002 to 2004, bridging the gap between the earlier Willamette core and the later Prescott. The 2.40 GHz / 533 MHz FSB variant represented a solid mid-range workstation and home PC configuration of the time, compatible with chipsets such as the Intel 845, 848, 850, 865, and 875 series on boards from manufacturers including ASUS, Gigabyte, MSI, and Intel itself. Today these processors are sought by system builders maintaining period-correct vintage PCs, hobbyists restoring late-1990s and early-2000s computing platforms, and technicians keeping legacy industrial or embedded systems running that were built around the Socket 478 platform. The SL6RZ specifically identifies the 2.40 GHz Northwood stepping, useful for matching the correct replacement to an existing system.