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Green printed circuit board with black memory chips and gold edge connectors

OWC

OWC 1U3D32R804GB 4GB DDR3 1333 CL9 2Rx8 240-pin 1.5V UDIMM

SKU CH-GC8P-8N4F2

4GB DDR3 1333 CL9 240-pin 1.5V UDIMM for Lenovo ThinkCentre M58 M71e M77 M81 M90 M91 desktops

  • Total capacity4 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • CAS latencyCL9
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • Boost multitasking with 4GB DDR3 1333 CL9 upgrade
  • JEDEC and RoHS compliant for warranty-safe installation
  • Unbuffered non-ECC 240-pin UDIMM at 1.5V
  • Tested to meet OEM specs for Lenovo ThinkCentre M58 M71e M77 M81 M90 M91
  • Simple DIY upgrade to improve desktop responsiveness

Ready upgrade for Lenovo ThinkCentre desktops

This single 4GB DDR3 1333 CL9 module is built for ThinkCentre M58, M71e, M77, M81, M90 and M91 systems. It targets owners who need a straightforward capacity increase without changing voltage or timing settings. The unbuffered non-ECC design matches the original specification for these platforms. Buyers who need ECC or registered memory cannot use this module.

Fits straight into a 240-pin DDR3 slot at 1.5V

The stick requires a free UDIMM socket and operates at the standard JEDEC PC3-10600 speed grade. No heat spreader is fitted, so clearance is minimal and airflow is unimpeded. It frees the builder from hunting for matched kits when only one slot is available. Systems that demand registered or load-reduced DIMMs are not supported.

Runs at CL9 latency under continuous workloads

The JEDEC-standard timings remain stable during extended multitasking or large-file editing sessions. Because the module is tested to meet OEM specs, error rates stay low without active cooling. It will not automatically downclock on boards that only support lower DDR3 speeds. Users seeking higher frequencies or tighter latencies must look elsewhere.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $4.50 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number1U3D32R804 GB
Total capacity4 GB
Product type240-Pin DDR3 Non-ECC UDIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Memory
CAS latencyCL9
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo ThinkCentre M58 Desktop
Lenovo ThinkCentre M71e Desktop
Lenovo ThinkCentre M77 Desktop
Lenovo ThinkCentre M81 Desktop
Lenovo ThinkCentre M90 Desktop

Other versions of this model

5 more in the same range

Questions about this item

Will the 1.5V DDR3 1333 CL9 module throttle under continuous load?

The module runs at standard JEDEC 1.5V with no heat spreader; sustained throughput is limited by the DDR3 1333 bus and CL9 latency rather than thermal throttling.

How much heat or noise does the unbuffered 240-pin DIMM add in a ThinkCentre running all day?

As a passive 1.5V DDR3 UDIMM with no heat spreader, it adds negligible heat and zero audible noise; system fan speed is dictated by the chassis and CPU, not the memory.

Which ThinkCentre desktops must I already own for this 4GB 2Rx8 kit to work?

Compatible systems are the Lenovo ThinkCentre M58, M71e, M77, M81, M90, M90p and M91 desktops.

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