Replacement for D4EC-2666-8G: Drop-In Alternatives We Stock
Looking for a replacement for the D4EC-2666-8G (D4EC-2666-8G Synology D4EC-2666-8G DDR4-2666 8GB ECC Server Memory)? Pro Disk Network ships drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the D4EC-2666-8G
| SKU | D4EC-2666-8G |
|---|---|
| Product | D4EC-2666-8G Synology D4EC-2666-8G DDR4-2666 8GB ECC Server Memory |
| Current price | $482.11 |
| Stock status | In Stock |
| Detail page | View D4EC-2666-8G › |
Drop-in replacements for D4EC-2666-8G
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
D4EC-2666-16G Synology D4EC-2666-8G DDR4-2666 8GB ECC Server Memory
SKU: D4EC-2666-16G
Price: $1,381.05
D4ES01-8G - Synology 8GB 2666 MHz PC4-21300 Non-ECC Unbuffered CL19 260-Pin SODIMM 1.2V Memory Module
SKU: D4ES01-8G
Price: $478.95
D4ES02-8G - Synology 8GB 2666 MHz PC4-21300 Non-ECC Unbuffered CL19 260-Pin SODIMM 1.2V Memory Module
SKU: D4ES02-8G
Price: $482.11
D4EU01-8G - Synology 8GB 2666 MHz PC4-21300 ECC Unbuffered CL19 288-Pin DIMM 1.2V Memory Module
SKU: D4EU01-8G
Price: $482.11
KSM26LQ4/64HCM Kingston KSM26LQ4/64HAM DDR4-2666 64GB/8Gx72 ECC Load Reduced CL19 Server Memory
SKU: KSM26LQ4-64HCM
Price: $518.25
NT8GA72D89BX3P-IX - Nanya 8GB PC4-21300 DDR4-2666 MHz ECC Registered CL19 288-Pin RDIMM 1.2V Single Rank x8 Memory Module
SKU: NT8GA72D89BX3P-IX
Price: $119.79
RMUA5110ME78HAF-2666 - Ramaxel 8GB DDR4-2666MHz PC4-21300 Non-ECC Unbuffered CL19 288-Pin UDIMM 1.2V Single Rank Memory Module
SKU: RMUA5110ME78HAF-2666
Price: $128.74
RMSA3260MH78HAF-2666 - Ramaxel 8GB DDR4-2666MHz PC4-21300 Non-ECC Unbuffered CL19 260-Pin SODIMM 1.2V Single Rank Memory Module
SKU: RMSA3260MH78HAF-2666
Price: $135.17
NT8GA72D89CX3S-HR - Nanya 8GB PC4-21300 DDR4-2666 MHz non-ECC unbuffered CL19 260-PIN SODIMM 1.2V Single Rank x8 Memory Module
SKU: NT8GA72D89CX3S-HR
Price: $135.17
NT8GA64D88CA3S-HR - Nanya 8GB PC4-21300 DDR4-2666 MHz non-ECC unbuffered CL19 260-PIN SODIMM 1.2V Single Rank x8 Memory Module
SKU: NT8GA64D88CA3S-HR
Price: $135.17
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.