32GB DDR4-2666 LRDIMM vs 64GB DDR5-4800 RDIMM
The 32GB DDR4-2666 LRDIMM and the 64GB DDR5-4800 RDIMM 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 3 listed specification rows and separate on capacity, speed, organisation, 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 DDR4-2666 LRDIMM vs 64GB DDR5-4800 RDIMM specifications
| Specification | 32GB DDR4-2666 LRDIMM | 64GB DDR5-4800 RDIMM |
|---|---|---|
| Capacity | 32GB | 64GB |
| Speed | DDR4-2666, PC4-21300 | DDR5-4800, PC5-38400 |
| Organisation | 4Rx4 (quad rank, x4 DRAMs) | 2Rx4 (dual rank, x4 DRAMs) |
| Form Factor | LRDIMM, 288-pin, DDR4 | RDIMM, 288-pin, DDR5 |
| Error Correction | ECC, load-reduced | ECC registered, with on-die ECC and sideband ECC |
| Intel Platforms | Xeon E5-2600 v4 (Broadwell); Xeon Scalable 1st and 2nd Gen | Xeon Scalable 4th Gen (Sapphire Rapids) and 5th Gen (Emerald Rapids), 8-channel |
| AMD Platforms | not stated | EPYC 9004 (Genoa) and 9005 (Turin), 12-channel |
| Voltage | 1.2V (JEDEC DDR4 standard) | 1.1V (JEDEC DDR5 standard) |
| Compatibility | Requires a platform that supports LRDIMM - not interchangeable with RDIMM in the same channel | not stated |
| DRAM | Micron / Samsung / SK hynix 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 |
| Power Management | not stated | On-module PMIC (DDR5), plus SPD hub |
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
- ·64GB DDR5-4800 RDIMM has the higher capacity (64 vs 32); 32GB DDR4-2666 LRDIMM trades that for something else.
- ·64GB DDR5-4800 RDIMM is the better figure for rated speed (DDR4-2666, PC4-21300 vs DDR5-4800, PC5-38400).
- ·Organisation — 32GB DDR4-2666 LRDIMM: 4Rx4 (quad rank, x4 DRAMs); 64GB DDR5-4800 RDIMM: 2Rx4 (dual rank, x4 DRAMs).
- ·Form Factor — 32GB DDR4-2666 LRDIMM: LRDIMM, 288-pin, DDR4; 64GB DDR5-4800 RDIMM: RDIMM, 288-pin, DDR5.
- ·Error Correction — 32GB DDR4-2666 LRDIMM: ECC, load-reduced; 64GB DDR5-4800 RDIMM: ECC registered, with on-die ECC and sideband ECC.
- ·Intel Platforms — 32GB DDR4-2666 LRDIMM: Xeon E5-2600 v4 (Broadwell); Xeon Scalable 1st and 2nd Gen; 64GB DDR5-4800 RDIMM: Xeon Scalable 4th Gen (Sapphire Rapids) and 5th Gen (Emerald Rapids), 8-channel.
- ·Voltage — 32GB DDR4-2666 LRDIMM: 1.2V (JEDEC DDR4 standard); 64GB DDR5-4800 RDIMM: 1.1V (JEDEC DDR5 standard).
What they share
DRAM: Micron / Samsung / SK hynix depending on lot - confirmed at quote; 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 DDR4-2666 LRDIMM if
- ·Organisation: 4Rx4 (quad rank, x4 DRAMs)
- ·Form Factor: LRDIMM, 288-pin, DDR4
- ·Error Correction: ECC, load-reduced
Choose the 64GB DDR5-4800 RDIMM if
- ·You need more capacity — the 64GB DDR5-4800 RDIMM lists 64GB against 32GB on the 32GB DDR4-2666 LRDIMM.
- ·You need more rated speed — the 64GB DDR5-4800 RDIMM lists DDR5-4800, PC5-38400 against DDR4-2666, PC4-21300 on the 32GB DDR4-2666 LRDIMM.
- ·Organisation: 2Rx4 (dual rank, x4 DRAMs)
Photos
What the two look like
32GB DDR4-2666 LRDIMM
Photo from the 32GB DDR4-2666 LRDIMM page. Every unit's label is read against your order before dispatch.
64GB DDR5-4800 RDIMM
Photo from the 64GB DDR5-4800 RDIMM page. Every unit's label is read against your order before dispatch.
Frequently asked questions
How much do the 32GB DDR4-2666 LRDIMM and the 64GB DDR5-4800 RDIMM 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 DDR4-2666 LRDIMM and the 64GB DDR5-4800 RDIMM?
Capacity (32GB DDR4-2666 LRDIMM: 32GB; 64GB DDR5-4800 RDIMM: 64GB); Speed (32GB DDR4-2666 LRDIMM: DDR4-2666, PC4-21300; 64GB DDR5-4800 RDIMM: DDR5-4800, PC5-38400); Organisation (32GB DDR4-2666 LRDIMM: 4Rx4 (quad rank, x4 DRAMs); 64GB DDR5-4800 RDIMM: 2Rx4 (dual rank, x4 DRAMs)).
Can I use the 32GB DDR4-2666 LRDIMM and the 64GB DDR5-4800 RDIMM in the same system?
Only within a supported population. The platform must accept both module types (LRDIMM, 288-pin, DDR4 vs RDIMM, 288-pin, DDR5), 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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