IBM 40H8145 256KB Level 2 Cache Module PC 750 PC 330

IBM 40H8145 256KB Level 2 Cache Module PC 750 PC 330

The IBM 40H8145 is a 256 kilobyte Level 2 (L2) cache module designed for IBM personal computer systems, specifically the PC 750 and PC 330 models. Level 2 cache is a high-speed memory component that sits between the CPU and main system RAM, significantly improving processor performance by reducing latency for frequently accessed data. This module was a popular upgrade for users seeking to enhance the responsiveness of their IBM systems during the late 1980s and early 1990s computing era.

Specifications & What's Included

• Part Number: IBM 40H8145
• Cache Capacity: 256 KB
• Cache Type: Level 2 (L2)
• Compatible Systems: IBM PC 750, IBM PC 330
• Form Factor: Plug-in memory module
• Module Only: Does not include mounting hardware or additional cables

Applications

Level 2 cache modules like the 40H8145 were installed directly into IBM PC 750 and PC 330 systems to boost CPU performance without requiring a processor upgrade. During the late 1980s through early 1990s, when these IBM personal computers were in common use in business and home environments, adding cache memory was one of the most cost-effective performance improvements available. This module is sought by vintage computing enthusiasts, collectors restoring period-correct IBM systems, and those maintaining legacy equipment still in service. The PC 750 and PC 330 represent a significant era of IBM personal computing before the industry's eventual shift to standardized form factors.