IBM Pim Memory Card Module 92F4601/C24955 2MB Card/module 3174/4783

( Brand: Ibm ), ( Manufacturer Part Number: C24955 ), ( Model: 92F4601 ), ( Form Factor: Dimm ), ( Capacity Per Module: 2 Mb ), ( Type: Other ), ( Creator: Ak )

Review IBM Genuine Vintage 92f4601/c24955 2mb Pim Memory Card/module 3174/4783

The **IBM C24955 92F4601/C24955 2MB PIM Memory Card/Module** is a specialized, high-performance memory expansion module designed exclusively for IBM s legacy **3174 Control Unit** and **4784 Display Station** systems, serving as a critical component in enhancing the storage capacity and operational efficiency of these mid-range computing platforms. Engineered during the era of advanced mainframe and terminal-based computing, this **2-megabyte (2MB) PIM (Programmable Interface Module)** card was crafted to interface seamlessly with the **3174 Control Unit**, which managed multiple **4783 Display Stations** high-resolution, graphics-capable terminals that relied on robust memory resources to handle complex data visualization, character-based applications, and real-time processing tasks. The module itself is a **dual-inline memory module (DIMM)-style card**, featuring a compact yet densely packed design that integrates **static RAM (SRAM)** technology to deliver fast, low-latency access to stored data, essential for maintaining smooth performance in high-demand environments.

Physically, the **C24955** is a **single-width, 16-bit data bus module** with a **ZIF (Zero Insertion Force) socket interface**, allowing for easy installation and replacement without risking damage to the delicate memory chips or the host system s connector pins. The card s **2MB capacity** (comprising either **256K x 8-bit or 512K x 16-bit SRAM chips**, depending on the exact configuration) was a substantial upgrade over the standard memory options available for the 3174/4784 systems, enabling users to expand their **virtual storage** and **buffering capabilities** significantly. This was particularly valuable for applications requiring large datasets, such as **CAD/CAM systems, financial modeling, or scientific computing**, where the ability to quickly retrieve and manipulate data was paramount. The module s **synchronous operation** with the 3174 s internal clock ensured minimal wait states, reducing bottlenecks and improving overall system throughput.

Beyond its technical specifications, the **C24955** reflects IBM s commitment to modularity and scalability in enterprise computing. By offering this **high-density memory solution**, IBM allowed organizations to future-proof their **3174-based networks** without requiring a complete system overhaul. The module s compatibility with the **4783 Display Station** a terminal renowned for its **high-resolution (1280x1024) graphics and advanced character sets** meant that users could leverage the additional memory to enhance the performance of **graphical applications, spreadsheets, and text editors**, all while maintaining the robust connectivity and reliability associated with IBM s mainframe architecture. For IT administrators and system integrators of the time, the **C24955** represented a practical investment in performance optimization, offering a balance between cost-effectiveness and high-end processing needs.

Today, the **IBM C24955 2MB PIM Memory Card** remains a sought-after component among collectors, historians of computing, and professionals restoring or repurposing legacy IBM systems. Its **vintage design**, combined with its critical role in expanding the functionality of the **3174/4784 ecosystem**, makes it a fascinating artifact of an era when memory was a premium resource and system architecture prioritized **modular expandability**. Whether used in a **retro computing setup, a museum exhibit, or a modern emulation environment**, this memory module serves as a tangible link to the technological advancements that shaped enterprise computing in the late 20th century. For those working with these systems, the **C24955** is not merely a piece of hardware it is a foundational element that helped define the capabilities of some of IBM s most influential mid-range computing solutions.

### **Pros and Cons of buying a IBM C24955 92F4601 (2MB PIM Memory Card/Module for 3174/4783)**

1. **Compatibility** The module is specifically designed for IBM 3174/4783 controllers, ensuring direct plug-and-play functionality without additional hardware modifications.

2. **Performance Boost** Increasing memory capacity (from the original 1MB to 2MB) enhances the display station s ability to handle more screens, applications, or data simultaneously, improving overall productivity.

3. **Extended Lifespan** Upgrading memory prevents bottlenecks that could degrade system performance over time, potentially extending the usable life of the 3174/4783 setup.

4. **Future-Proofing** While these systems are legacy, upgrading memory ensures they remain functional for longer in environments where they are still in use (e.g., legacy mainframe operations, testing, or archival purposes).

5. **Cost-Effective Upgrade** Compared to replacing the entire controller or display station, upgrading memory is a relatively low-cost solution to improve performance.

6. **Authentic IBM Part** Purchasing from an authorized or reputable source ensures the module is genuine, reducing risks of counterfeit or incompatible parts that could cause system instability.

1. **High Cost Relative to Value** The module is an older, specialized component, and prices may be significantly higher than modern memory solutions. The return on investment may be minimal if the system is no longer in active use.

2. **Limited Availability** Finding a genuine, working unit can be difficult, as IBM no longer manufactures these parts. Sellers may charge premium prices, or the module might be hard to source without extensive research.

3. **Depreciation** Since the 3174/4783 and its memory modules are obsolete, any investment in upgrading them will not retain value. The module is likely a one-time-use purchase with no resale market.

4. **Compatibility Risks** Even if the module fits physically, there is a chance it may not work perfectly due to firmware or electrical compatibility issues, especially if the original system has been modified or is in poor condition.

5. **Maintenance Challenges** Older hardware requires specialized knowledge to troubleshoot. If the system fails after the upgrade, finding technicians familiar with these components may be difficult.

6. **No Long-Term Support** IBM no longer provides technical support or warranties for these parts. Any issues post-purchase would require self-diagnosis or reliance on third-party experts, which may be costly.

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- The system is still in active use and performance degradation is a critical issue.

- The cost of the upgrade is justified by the operational benefits (e.g., handling more screens or applications).

- A genuine, tested module can be acquired at a reasonable price.

However, if the system is **no longer in regular use, being phased out, or used only for archival/testing purposes**, the expense of this upgrade may not be worthwhile. The module s high cost, limited availability, and lack of long-term value make it a niche purchase best suited for organizations with a **specific, immediate need** for improved memory capacity in legacy hardware.

---

1. **Assess Current Usage** Determine whether the 3174/4783 is still actively used and if the memory upgrade will provide measurable benefits. If the system is rarely used, the upgrade may not be cost-effective.

2. **Verify Module Authenticity and Condition** Purchase from a trusted seller (e.g., eBay with seller feedback, IBM part resellers, or auction houses specializing in legacy hardware). Request proof of functionality (e.g., test reports) if possible.

3. **Compare Costs** Calculate whether the upgrade cost is justified by the system s remaining operational lifespan. If the system is nearing retirement, consider alternatives like virtualization or migration to modern display solutions.

4. **Explore Alternatives** If the goal is to improve display performance, evaluate whether a **modern thin client or terminal emulator** (e.g., running on a PC with IBM 3270 emulation software) could achieve similar results at a fraction of the cost.

5. **Document the Upgrade** If proceeding, document the process in case future troubleshooting is needed, as support resources for these components are scarce.

**Final Verdict:** Only proceed with the purchase if the system s continued use is critical and the upgrade directly addresses a performance bottleneck. Otherwise, weigh the costs against the diminishing returns of maintaining obsolete hardware.

Details:

This specific model is created by AK and a reliable option for those looking to enhance their server memory capabilities with product from trusted brand like IBM. The product is a genuine vintage IBM 2MB PIM memory card/module for 3174/4783 servers. It features a DIMM form factor and capacity of 2MB per module.

part #: c24955 prices

• $33.25-$87.00

specifications servermemor:

• brand: Ibm
• mpn: C24955
• model: 92f4601
• form factor: Dimm
• capacity per module: 2 Mb
• type: Other
• creator: Ak

general servermemor:

• condition: Used
• Enterprise Networking, Servers > Server Components > Server Memory RAM

shipping servermemor:

• type: Calculated
• transit: 4-10 Days
• carrier: USPS
• cost: $5.97
• service: USPS Ground Advantage
• class: Standard

payments servermemor:

• wallet: Paypal
• credit card: Mastercard
• other
• money order

offer servermemor:

• options: Ship-to-home
• best offers: True
• sold: 0
• quantity: 1
• started: May 5, 2026
• availability: In Stock

returns servermemor:

• policy: No Returns

seller servermemor:

• rating: 96.9%
• city: Jasper, Georgia
• # reviews: 61

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