4MB 72 Pin SIMM RAM Stick HY5117400B Vintage Memory Module 1990s Collectible

This 72-pin SIMM RAM stick is labeled 4MB and uses Hyundai HY5117400B chips, marked Korea 9651A. Likely from the 1990s, it was commonly used in early PCs and workstations. No corrosion or bent pins. One module included, exactly as shown. These vintage RAM sticks are untested. I don’t have compatible hardware to verify functionality, but they appear to be in excellent physical condition—no bent pins, corrosion, or visible damage. All information provided (capacity, speed, model numbers, etc.) has been sourced online and may not be 100% accurate, as documentation for vintage components can be limited or inconsistent. Please do your own due diligence to confirm compatibility and specs before purchasing. These are being sold as collectible or legacy parts, with no guarantees expressed or implied.