Crucial
Crucial 256MB PC133 133MHz non-ECC Unbuffered CL2 168-Pin DIMM Memory Module
Best memory upgrade for maintaining legacy computer systems.
Boost your system's capabilities with this Crucial 256MB SDRAM memory module. Engineered for dependable performance, it operates at a PC133 (133MHz) speed and fits standard 168-Pin DIMM slots. This module features non-ECC error correction and an unbuffered design for stable operation. With a CAS latency of 2 and a 3.3V operating voltage, it's an excellent choice for upgrading or maintaining compatible older systems that require reliable, standard-speed memory.
$129.67
Owner Satisfaction
4.7
/ 5
Category Rank
47
/ 3233
#47 in RAM
Price vs Category Average
-75%
Below average
Capacity
256
/ MB
Who it's for
- Performance seekers optimizing legacy systems for faster response times
- Retro PC enthusiasts needing reliable, stable hardware components
- Vintage computer restorers requiring specific, period-correct memory upgrades
Who should skip it
- Modern users requiring memory for contemporary software and multitasking
- System builders looking for compatibility with current motherboard standards
- Owners of aging hardware with limited power and cooling capacity
Performance breakdown
Legacy System Compatibility
Perfectly suited for reviving vintage hardware requiring 168-pin SDRAM architecture.
Signal Stability
Unbuffered design ensures reliable data flow for older motherboard chipsets.
Response Latency
Low CL2 timing provides a snappy feel for period-correct computing tasks.
Thermal Efficiency
Standard 3.3V operation keeps heat output manageable in older chassis designs.
Installation Ease
Standard DIMM form factor makes physical upgrades quick and straightforward.
Multitasking Capacity
Limited 256MB ceiling is best reserved for basic, single-application legacy workloads.
Key Specs
Capacity
256MB
Data Transfer Rate
133MHz
Pins
168 Pin
Memory Type
SDRAM
Bus Type
PC-133
Error Correction
Non-ECC
Voltage
3.3V
Manufacturer Part #
CT32M64S4D75.16LTGY
Features
- 256MB capacity for essential tasks
- Reliable PC133 (133MHz) operation
- Non-ECC error detection
- Unbuffered design for compatibility
- Standard 168-Pin DIMM form factor
- Low CL2 latency support
What customers say
This memory module earns high praise primarily for its exceptional reliability and seamless integration into legacy computer systems. Users maintaining vintage PCs or specialized industrial equipment value Crucial's trusted quality. The module installs easily and operates flawlessly, meeting the strict timing requirements often demanded by older motherboards. Reviewers confirm immediate performance gains, effectively extending the useful life of obsolete machines. While the cost per megabyte is high by modern standards, customers find the value excellent because it solves difficult hardware sourcing issues, preventing expensive system replacements. Consistent performance and a low rate of initial failures make this a highly trusted component for legacy infrastructure support.
Know before you buy
No, this is an older SDRAM module designed for legacy systems. It uses a 168-pin DIMM interface, which is physically incompatible with the DDR3, DDR4, or DDR5 slots found in modern motherboards.
Non-ECC means the module does not perform error correction, which is standard for most home and office desktop computers. The unbuffered design means the memory controller communicates directly with the RAM, which is the standard requirement for the older motherboards that support this specific PC133 speed.
Yes, you can mix this module with other RAM, provided your motherboard has an available 168-pin DIMM slot and supports PC133 SDRAM. However, ensure your system's total memory capacity does not exceed the maximum limit specified by your motherboard manufacturer.
CAS Latency (CL) refers to the delay between the memory receiving a command and the data being available. A CL2 rating is faster than the more common CL3, meaning this module can provide slightly better responsiveness for systems that support it.
You should check your motherboard's manual or the manufacturer's website for memory specifications. Look for support for '168-pin SDRAM' and 'PC133' or '133MHz' bus speeds to ensure compatibility.
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