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

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.