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DDR5 CUDIMM (Clocked Unbuffered UDIMM) Buy RAM - All modules at a glance
Here you will find all available DDR5 CUDIMM (Clocked Unbuffered UDIMM) Modules from branded manufacturers such as Samsung, Hynix, Micron and our quality private label phs memory. Click on the module description for detailed information on technical details and specifications such as memory clock speed, JEDEC standard, ranks, etc.
6400MHz - 1,1 volt
Standard computer memory without device specification. more ...
incl. VAT plus shipping costs
DDR5 CUDIMM (Clocked Unbuffered UDIMM) - Standard-RAM
The DDR5 CUDIMM (Clocked Unbuffered UDIMM) RAM memory modules offered here have been manufactured according to the JEDEC standard. These are standard RAM modules that have not been specifically tested or approved for any particular device. In the vast majority of cases, these modules work flawlessly as long as the technical specifications match.
Technical Differences: What to Consider When Purchasing
When purchasing standard CUDIMM (Clocked Unbuffered UDIMM) modules, not only the capacity (GB) and clock frequency are important, but especially the modernized structural features of the latest memory generation determine whether the RAM will be optimally recognized by your system:
- Single-Rank (1R) vs. Dual-Rank (2R): This specification describes the internal distribution of the memory chips. Since DDR5 controllers are extremely sensitive to module population, the rank type is crucial - especially if you plan to populate multiple motherboard slots.
- Memory Organization & Bit Width: The internal chip configuration (e.g. x4, x8 or x16) directly affects DDR5 system stability. It determines whether the module will operate reliably with your specific processor generation.
- On-Die ECC vs. Side-Band ECC: Every standard DDR5 module already includes On-Die ECC for internal chip-level error correction. However, server and enterprise systems require specialized modules that additionally support Side-Band ECC to secure the entire data path to the CPU.
- New Driver Technologies (CUDIMM & CSODIMM): Check whether your system already requires the latest clocked DDR5 variants. CUDIMM (for desktops) and CSODIMM (for notebooks) include an integrated clock driver chip (CKD) directly on the module, enabling more stable signal rates at extremely high speeds.
Technical Specifications Overview (JEDEC Standard)
The following matrix shows the typical combinations and structural differences of the available DDR5 RAM modules:
Module Size (Capacity) | Rank Organization (Typical) | Memory Type |
Small Capacities | Single-Rank (1Rx16) | UDIMM SO-DIMM |
Medium and High Capacities | Single-Rank (1Rx8) | UDIMM / ECC |
Medium and High Capacities | Single-Rank (1Rx4 / 1Rx8) | RDIMM |
Very High Capacities | Dual-Rank (2Rx4), 3DS | RDIMM |
Important Compatibility Notice
The memory modules offered here are sold as standard RAM without official certification for specific devices. Therefore, we cannot guarantee compatibility or flawless operation in a particular system.
Before purchasing, please make sure to compare the technical specifications of the memory module with the requirements of your system or motherboard. This information can usually be found in the device manual or on the manufacturer's website.
If you are unsure which memory module is suitable for your system, we recommend using our device full-text search or contacting our memory support hotline. This way, you can quickly find the right RAM for your system.