32GB DDR4-2133 LRDIMM vs 32GB DDR4-2666 LRDIMM
The 32GB DDR4-2133 LRDIMM and the 32GB DDR4-2666 LRDIMM are both server memory modules we supply tested from Hong Kong, and the figures below are the same ones published on each product page. They share 8 listed specification rows and separate on speed, intel platforms, dram, so the decision is less about "which is better" and more about which of those differences your platform or workload can actually use.
Nothing on this page is a price: component pricing moved too fast in 2026 for a printed figure to stay honest, so both are quoted on request against confirmed stock with the date the quote holds until. If you are replacing a part, send the platform and we will confirm the population before you commit.
Side by side
32GB DDR4-2133 LRDIMM vs 32GB DDR4-2666 LRDIMM specifications
| Specification | 32GB DDR4-2133 LRDIMM | 32GB DDR4-2666 LRDIMM |
|---|---|---|
| Capacity | 32GB | 32GB |
| Speed | DDR4-2133, PC4-17000 | DDR4-2666, PC4-21300 |
| Organisation | 4Rx4 (quad rank, x4 DRAMs) | 4Rx4 (quad rank, x4 DRAMs) |
| Form Factor | LRDIMM, 288-pin, DDR4 | LRDIMM, 288-pin, DDR4 |
| Error Correction | ECC, load-reduced | ECC, load-reduced |
| Intel Platforms | Xeon E5-2600 v3 (Haswell) and v4 (Broadwell) | Xeon E5-2600 v4 (Broadwell); Xeon Scalable 1st and 2nd Gen |
| Voltage | 1.2V (JEDEC DDR4 standard) | 1.2V (JEDEC DDR4 standard) |
| Compatibility | Requires a platform that supports LRDIMM - not interchangeable with RDIMM in the same channel | Requires a platform that supports LRDIMM - not interchangeable with RDIMM in the same channel |
| DRAM | Samsung / SK hynix / Micron depending on lot - confirmed at quote | Micron / Samsung / SK hynix depending on lot - confirmed at quote |
| Condition | New, or decommissioned pulls - stated line by line before you order | New, or decommissioned pulls - stated line by line before you order |
| Warranty | 1 year, in writing, confirmed with the order | 1 year, in writing, confirmed with the order |
Rows that differ are highlighted. Figures are the same ones published on each product page; where a figure is community-sourced rather than vendor-published it is stated on that page. Confirm every part against your build sheet when ordering.
Where they differ
- ·Speed — 32GB DDR4-2133 LRDIMM: DDR4-2133, PC4-17000; 32GB DDR4-2666 LRDIMM: DDR4-2666, PC4-21300.
- ·Intel Platforms — 32GB DDR4-2133 LRDIMM: Xeon E5-2600 v3 (Haswell) and v4 (Broadwell); 32GB DDR4-2666 LRDIMM: Xeon E5-2600 v4 (Broadwell); Xeon Scalable 1st and 2nd Gen.
- ·DRAM — 32GB DDR4-2133 LRDIMM: Samsung / SK hynix / Micron depending on lot - confirmed at quote; 32GB DDR4-2666 LRDIMM: Micron / Samsung / SK hynix depending on lot - confirmed at quote.
What they share
Capacity: 32GB; Organisation: 4Rx4 (quad rank, x4 DRAMs); Form Factor: LRDIMM, 288-pin, DDR4; Error Correction: ECC, load-reduced; Voltage: 1.2V (JEDEC DDR4 standard); Compatibility: Requires a platform that supports LRDIMM - not interchangeable with RDIMM in the same channel; Condition: New, or decommissioned pulls - stated line by line before you order; Warranty: 1 year, in writing, confirmed with the order.
Decision
Which one to buy
Memory choices are governed by the platform first and the price second. Capacity per module decides how far a fixed number of slots can go; rated speed decides the channel ceiling, but only if the CPU and the rest of the population can hold it; type (RDIMM versus LRDIMM) decides whether the module will train at all, because the two cannot share a channel. Work out the per-channel population you need first, then choose the module that reaches it within the platform's rank limit — a larger module is not automatically the better buy if the resulting population runs at a lower speed.
Choose the 32GB DDR4-2133 LRDIMM if
- ·Intel Platforms: Xeon E5-2600 v3 (Haswell) and v4 (Broadwell)
- ·DRAM: Samsung / SK hynix / Micron depending on lot - confirmed at quote
Choose the 32GB DDR4-2666 LRDIMM if
- ·Intel Platforms: Xeon E5-2600 v4 (Broadwell); Xeon Scalable 1st and 2nd Gen
- ·DRAM: Micron / Samsung / SK hynix depending on lot - confirmed at quote
Photos
What the two look like
32GB DDR4-2133 LRDIMM
Photo from the 32GB DDR4-2133 LRDIMM page. Every unit's label is read against your order before dispatch.
32GB DDR4-2666 LRDIMM
Photo from the 32GB DDR4-2666 LRDIMM page. Every unit's label is read against your order before dispatch.
Frequently asked questions
How much do the 32GB DDR4-2133 LRDIMM and the 32GB DDR4-2666 LRDIMM cost?
We do not publish prices for either: DRAM and CPU pricing moved too fast in 2026 for a printed figure to stay honest. Send the quantity, the platform and the condition you want and we quote both against confirmed stock, with the date the figure holds until.
What is the main difference between the 32GB DDR4-2133 LRDIMM and the 32GB DDR4-2666 LRDIMM?
Speed (32GB DDR4-2133 LRDIMM: DDR4-2133, PC4-17000; 32GB DDR4-2666 LRDIMM: DDR4-2666, PC4-21300); Intel Platforms (32GB DDR4-2133 LRDIMM: Xeon E5-2600 v3 (Haswell) and v4 (Broadwell); 32GB DDR4-2666 LRDIMM: Xeon E5-2600 v4 (Broadwell); Xeon Scalable 1st and 2nd Gen); DRAM (32GB DDR4-2133 LRDIMM: Samsung / SK hynix / Micron depending on lot - confirmed at quote; 32GB DDR4-2666 LRDIMM: Micron / Samsung / SK hynix depending on lot - confirmed at quote).
Can I use the 32GB DDR4-2133 LRDIMM and the 32GB DDR4-2666 LRDIMM in the same system?
Only within a supported population. The platform must accept both module types (LRDIMM, 288-pin, DDR4 vs LRDIMM, 288-pin, DDR4), and LRDIMM and RDIMM cannot share a channel. Tell us the platform and we will check the population before shipping.
Which one should I buy?
Buy the one whose strong points match the job: see the "Choose" section above. If you are replacing an existing part, send the platform or the old part number and we will confirm compatibility before you order.
What condition are they in, and do you ship worldwide?
Both are supplied tested with a 1-year written warranty. Condition is stated line by line before you order — new, decommissioned pull or OEM tray — and we ship worldwide from the Hong Kong warehouse with full export documentation, typically 3–7 days by air.
Get a quote for either — or both
Tell us the quantity, the platform and the condition you need. We confirm stock and put a firm figure in writing with the date it holds until.
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