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Green 144-pin SO-DIMM laptop memory module with black chips

Kingston Technology Corp.

Kingston Technology Corp. KVR133X64SC3/256 256MB 144-Pin SO-DIMM PC 133 laptop RAM

SKU CH-VD8K-KN1WJ MPN KVR133X64SC3/256

256 MB PC 133 laptop memory in a 144-pin SO-DIMM with CL3 latency and 3.30 V operation

  • Total capacity256 MB
  • Rated speedPC 133
  • CAS latencyCL3
  • Rated voltage3.3 V
  • Buffer typeUnbuffered
  • Product type144-Pin SO-DIMM
  • 256 MB capacity extends usable memory on legacy laptops
  • PC 133 speed matches original system specifications
  • CL3 latency supports stable operation at rated frequency
  • 144-pin SO-DIMM form factor fits compatible notebook slots
  • 30 V unbuffered design works with standard laptop memory controllers

Kingston ValueRAM 256MB SO-DIMM

This module adds 256MB of PC 133 memory to laptops that accept 144-pin SO-DIMMs. It suits owners of legacy systems who need a direct replacement or a modest capacity increase for everyday tasks. The unbuffered design and CL3 latency match the original specifications for this platform. Buyers who want more storage or faster speeds must look elsewhere.

Fits 144-pin slots at 3.30V

The stick installs in any compatible 144-pin socket that operates at 3.30 volts. No extra power cables, cooling or BIOS updates are required beyond what the laptop already provides. It frees a second slot for another module if the board supports dual-channel operation. Systems that demand registered or ECC memory cannot use this part.

Steady CL3 timing under load

Sustained workloads see consistent CL3 timing because the module runs at its rated PC 133 speed without overclocking. The 3.30V supply remains stable during extended sessions, avoiding throttling caused by voltage drift. Unbuffered operation keeps latency predictable for older chipsets. Heavy multitasking beyond 256MB will still hit the capacity ceiling.

How it compares

Measured against everything we stock in Laptop RAM, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 79% of the 2,079 comparable items (median $70.99).
Total capacity 256 MB
Lower than about 99% of the 1,886 comparable items (median 16 GB).
Price per GB $101.52 per GB
Pricier than about 93% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameKingston
Product lineValueRAM
Model nameKVR133 × 64SC3/256
Total capacity256 MB
Product type144-Pin SO-DIMM
Performance
Rated speedPC 133
Memory
CAS latencyCL3
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage3.3 V
Size & build
Shipping weight0.09 kg
Package size170 × 56 × 15 mm

Questions about this item

Does the 133 MHz bus speed become a bottleneck under sustained workloads?

The module runs at PC 133 with CAS latency CL3, so the 133 MHz bus and its timing are the primary throughput limit during extended use.

How much heat or power does the unbuffered 3.30V module generate during all-day operation?

As an unbuffered SO-DIMM rated at 3.30V without ECC, it draws modest power and produces low heat typical of legacy laptop memory.

Which laptop slot and chipset are required for this 144-pin SO-DIMM to work?

It requires a 144-pin SO-DIMM socket and a chipset that supports PC 133 SDRAM at 3.30V.

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