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C3975A 32MB 70ns 72pin SIMM Memory Upgrade for HP LaserJet 4+, 4M+, 5, 5N, 5M, 5Si, 4V, 4MV
Keystron

C3975A 32MB 70ns 72pin SIMM Memory Upgrade for HP LaserJet 4+, 4M+, 5, 5N, 5M, 5Si, 4V, 4MV

Bottom line: The Keystron C3975A 32MB 70ns 72pin SIMM Memory Upgrade for HP LaserJet 4+ is a specs-and-price decision rather than a crowd-consensus one in the memory & ram category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ One 32MB 72pin 70ns FP SIMM

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

Compatible with HP LaserJet 4+, 4M+, 4V, 4MV, 5, 5M, 5N, 5Si

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SpecPicks Verdict

SpecPicks scored Keystron C3975A 32MB 70ns 72pin SIMM Memory Upgrade for HP LaserJet 4+ using a rating × review-volume × price-fit model applied to published specs and reviews across the memory & ram category. Keystron's memory & ram lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for memory & ram of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • One 32MB 72pin 70ns FP SIMM
  • Part#: C3975A
  • 100% Compatible with Lifetime Warranty
  • Manufactured by Keystron, LLC
  • Keystron is a registered trademark of Keystron, LLC

Full Specifications

BrandKeystron
Part#C3975A
Voltage4 volts
RAM Size32 MB
Form Factor72-pin_SIMM
Model NumberC3975A
Number of Pins72
Mfr Part NumberC3975A
Special FeatureLightweight
Compatible DevicesPrinter
Additional FeaturesLightweight
Computer Memory Size32 MB

Ready to buy?

C3975A 32MB 70ns 72pin SIMM Memory Upgrade for HP LaserJet 4+, 4M+, 5, 5N, 5M, 5Si, 4V, 4MV is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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C3975A 32MB 70ns 72pin SIMM Memory Upgrade for HP LaserJet 4+, 4M+, 5, 5N, 5M, 5Si, 4V, 4MV
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