Replacement for D4EU01-4G: Drop-In Alternatives We Stock
Looking for a replacement for the D4EU01-4G (D4EU01-4G - Synology 4GB 2666 MHz PC4-21300 ECC Unbuffered CL19 288-Pin DIMM 1.2V Memory Module)? 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 D4EU01-4G
| SKU | D4EU01-4G |
|---|---|
| Product | D4EU01-4G - Synology 4GB 2666 MHz PC4-21300 ECC Unbuffered CL19 288-Pin DIMM 1.2V Memory Module |
| Current price | $432.93 |
| Stock status | In Stock |
| Detail page | View D4EU01-4G › |
Drop-in replacements for D4EU01-4G
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.
D4NE-2666-4G - Synology 4GB DDR4-2666 MHz PC4-21300 non ECC-Unbuffered CL19 288-Pin UDIMM 1.2V Memory Module
SKU: D4NE-2666-4G
Price: $222.33
D4NESO-2666-4G - Synology 4GB 2666 MHz PC4-21300 Non-ECC Unbuffered CL19 260-Pin SODIMM 1.2V Memory Module
SKU: D4NESO-2666-4G
Price: $334.74
RAM-4GDR4ECP0-UD-2666 - QNAP 4GB DDR4-2666 MHz PC4-21300 ECC Unbuffered CL19 288-Pin UDIMM Memory Module
SKU: RAM-4GDR4ECP0-UD-2666
Price: $277.08
D4ES01-4G - Synology 4GB 2666 MHz PC4-21300 Non-ECC Unbuffered CL19 260-Pin SODIMM 1.2V Memory Module
SKU: D4ES01-4G
Price: $334.74
D4ES02-4G - Synology 4GB 2666 MHz PC4-21300 ECC Unbuffered CL19 260-Pin SODIMM 1.2V Memory Module
SKU: D4ES02-4G
Price: $345.26
RAM-4GDR4ECI0-RD-2666 - QNAP 4GB PC4-21300 DDR4-2666 MHz ECC Registered CL19 288-Pin DIMM 1.2V Dual Rank x4 Memory Module
SKU: RAM-4GDR4ECI0-RD-2666
Price: $213.26
NT4GA64DH4CX4S-HR - Nanya 4GB PC4-21300 DDR4-2666 MHz non-ECC unbuffered CL19 260-PIN SODIMM 1.2V Single Rank x16 Memory Module
SKU: NT4GA64DH4CX4S-HR
Price: $85.82
NT4GA64DH4CX4F-HR - Nanya 4GB PC4-21300 DDR4-2666 MHz non-ECC unbuffered CL19 288-Pin UDIMM 1.2V Single Rank x16 Memory Module
SKU: NT4GA64DH4CX4F-HR
Price: $97.12
JM2666HSH-4G - Transcend 4GB 2666 MHz PC4-21300 Non-ECC Unbuffered CL19 260-Pin SODIMM 1.2V 1Rx8 Memory Module
SKU: JM2666HSH-4G
Price: $110.99
TS2666HSH-4G - Transcend 4GB 2666 MHz PC4-21300 Non-ECC Unbuffered CL19 260-Pin SODIMM 1.2V 1Rx8 Memory Module
SKU: TS2666HSH-4G
Price: $110.99
TS2666HLH-4G - Transcend 4GB 2666 MHz PC4-21300 Non-ECC Unbuffered CL19 288-Pin DIMM 1.2V 1Rx8 Memory Module
SKU: TS2666HLH-4G
Price: $115.61
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.