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DDR3 UDIMM Unbuffered Memory
Key takeaways
- 3,987 listings match this collection right now.
- DDR3 UDIMM carries no register between the DRAM and memory controller, which keeps rank count and slot population lower than registered memory allows on the same platform.
- Single-socket Xeon E3 and entry workstation boards from the DDR3 generation are the platforms built to accept unbuffered modules rather than registered ones.
- DDR3 UDIMM runs at the JEDEC-standard 1.5V DDR3 voltage, a full 0.3V above the 1.2V baseline of the DDR4 generation that replaced it.
Unbuffered DDR3 served the single-socket and workstation platforms of its generation. It is not accepted by most two-socket servers and cannot be mixed with registered modules. This collection holds both ECC and non-ECC unbuffered parts; the listing states which, and an ECC platform needs the ECC part.
3,987 listings in this collection, filtered from Server Memory. The part number and manufacturer are stated on every listing, and the condition wherever the catalogue records one. For quantity, request a volume quote.
How to choose server memory
DDR3, DDR4 and DDR5 modules are keyed differently and do not interchange, so the generation your platform accepts comes first. Registered (RDIMM), load-reduced (LRDIMM) and unbuffered (UDIMM) modules cannot be mixed in one system: add the type already installed, or replace the full bank. Match rank and speed to the existing modules, and read an installed part number from iDRAC or iLO when in doubt.
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More priced parts in Server Memory
- Hynix HMA82GU7CJR8N-VKT0-AD 16GB DDR4-2666MHz UDIMM 2Rx8 CL19 Memory
- Dell A7545684 32GB DDR3-1866MHz LRDIMM 4Rx4 CL13 Memory
- Hynix HMA84GR7MFR4N-TFT1BB 32GB DDR4-2133MHz RDIMM 2Rx4 CL15 Memory
- HP 313615-B21 128MB 100MHz PC100 CL2 RRDIMM Memory
- Micron MTA36ASF4G72PZ-3G2J3VI 32GB DDR4-3200MHz RDIMM 2Rx4 CL22 Memory
- Samsung M393A4K40DB2-CWEBQ 32GB DDR4-3200MHz RDIMM 2Rx4 CL22 Memory
- HP 202173-B21 8GB Kit (4x2GB) DDR-200MHz RDIMM 2Rx4 CL2 Memory
- Hynix HMCG78AEBRA110N 16GB DDR5-4800MHz RDIMM 1Rx8 CL40 Memory
- Compaq 110958-032 256MB 100MHz PC100 CL2 RRDIMM Memory
- HP 840760-191 128GB DDR4-2666MHz RDIMM 8Rx4 CL19 Memory
- Dell A3138306 16GB DDR3-1066MHz RDIMM 4Rx4 CL7 Memory
- Samsung M393A2K40CB2-CTD7Y 16GB DDR4-2666MHz RDIMM 1Rx4 CL19 Memory