Kingston DDR4-2666 ECC RDIMM 1x64GB vs Samsung DDR4-3200 ECC RDIMM 1x64GB
Samsung DDR4-3200 ECC RDIMM 1x64GB has the lower true latency of the two at 13.75 ns, against 14.25 ns for Kingston DDR4-2666 ECC RDIMM 1x64GB. Kingston DDR4-2666 ECC RDIMM 1x64GB is tracked at the lower price, so the two split the axes this page measures, one each.
| Specification | KingstonDDR4-2666 ECC RDIMM 1x64GB | SamsungDDR4-3200 ECC RDIMM 1x64GB |
|---|---|---|
| Capacity (GB) | 64 | 64 |
| Speed (MT/s) | 2666 | 3200better |
| 19 | 22 | |
| True latency (ns) | 14.25 | 13.75better |
| Current best price | £299.00betterat Amazon.co.uk · captured 2026-09-13 | £1,257.00at Amazon.co.uk · captured 2026-09-13 |
| Price per GB | £4.67better | £19.64 |
Kingston DDR4-2666 ECC RDIMM 1x64GB vs Samsung DDR4-3200 ECC RDIMM 1x64GB in detail
True latency
Samsung DDR4-3200 ECC RDIMM 1x64GB is the lower-latency kit at 13.75 ns against 14.25 ns for Kingston DDR4-2666 ECC RDIMM 1x64GB, 0.50 ns between them. That is the figure that reconciles the two spec sheets: a CAS number counts cycles, and cycles mean nothing apart from the rate they are counted at. Kingston DDR4-2666 ECC RDIMM 1x64GB runs 2666 MT/s at CL19; Samsung DDR4-3200 ECC RDIMM 1x64GB runs 3200 MT/s at CL22.
Transfer rate
Samsung DDR4-3200 ECC RDIMM 1x64GB carries the higher rating, 3200 MT/s to 2666 MT/s for Kingston DDR4-2666 ECC RDIMM 1x64GB — 25600 MB/s per module against 21328 MB/s. That is peak transfer rate, not access time: a higher clock is reached by counting more cycles for each access, which is why the CAS numbers differ too and why the true latency above is the directly comparable figure.
Price and tracked history
Kingston DDR4-2666 ECC RDIMM 1x64GB is tracked at £299.00, or £4.67 per gigabyte; Samsung DDR4-3200 ECC RDIMM 1x64GB at £1,257.00, or £19.64. At the same 64GB, that puts Kingston DDR4-2666 ECC RDIMM 1x64GB £958.00 less than Samsung DDR4-3200 ECC RDIMM 1x64GB.
Kit layout
Kingston DDR4-2666 ECC RDIMM 1x64GB ships as 1 × 64GB and Samsung DDR4-3200 ECC RDIMM 1x64GB ships as 1 × 64GB — the same number of sticks on both sides, so they populate a board's slots the same way.
Lighting and ECC
On lighting: Kingston DDR4-2666 ECC RDIMM 1x64GB is published with no RGB lighting, and Samsung DDR4-3200 ECC RDIMM 1x64GB is published with no RGB lighting. On error correction: Kingston DDR4-2666 ECC RDIMM 1x64GB supports ECC, and Samsung DDR4-3200 ECC RDIMM 1x64GB supports ECC. ECC is a board and CPU feature as much as a module one, so it is worth having only where the platform can use it.
Which to buy
There is no single answer here, because each kit leads on one axis. Kingston DDR4-2666 ECC RDIMM 1x64GB is the cheaper at the prices tracked here, and Samsung DDR4-3200 ECC RDIMM 1x64GB the quicker on true latency at 13.75 ns against 14.25 ns. Which matters more depends on the build and the budget, and that is not a call this page can make.
Common questions about this pair
- Is Kingston DDR4-2666 ECC RDIMM 1x64GB faster than Samsung DDR4-3200 ECC RDIMM 1x64GB?
- Yes, on true latency: 13.75 ns for Samsung DDR4-3200 ECC RDIMM 1x64GB against 14.25 ns for Kingston DDR4-2666 ECC RDIMM 1x64GB. Kingston DDR4-2666 ECC RDIMM 1x64GB runs 2666 MT/s at CL19 and Samsung DDR4-3200 ECC RDIMM 1x64GB runs 3200 MT/s at CL22, and the CAS numbers alone will not settle it — they count clock cycles, not time.
- Which one costs less?
- Kingston DDR4-2666 ECC RDIMM 1x64GB, tracked at £299.00 against £1,257.00: £958.00 between them at the same 64GB.
- Which of these two should I buy?
- There is no single answer here, because each kit leads on one axis. Kingston DDR4-2666 ECC RDIMM 1x64GB is the cheaper at the prices tracked here, and Samsung DDR4-3200 ECC RDIMM 1x64GB the quicker on true latency at 13.75 ns against 14.25 ns. Which matters more depends on the build and the budget, and that is not a call this page can make.