Replacement for K4Y4J: Drop-In Alternatives We Stock
Looking for a replacement for the K4Y4J (K4Y4J - Dell 16GB DDR4-2666MHz ECC Unbuffered CL19 UDIMM 1.2V 2R Memory Module)? Pro Disk Network ships Dell 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 K4Y4J
| SKU | K4Y4J |
|---|---|
| Product | K4Y4J - Dell 16GB DDR4-2666MHz ECC Unbuffered CL19 UDIMM 1.2V 2R Memory Module |
| Current price | $336.95 |
| Stock status | In Stock |
| Detail page | View K4Y4J › |
Drop-in replacements for K4Y4J
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.
AA103684 - Dell 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: AA103684
Price: $145.26
370-AEBF - Dell 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: 370-AEBF
Price: $273.50
Dell SNPTP9W1C/16G 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: SNPTP9W1C-16G
Price: $273.50
370-ADLW - Dell 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: 370-ADLW
Price: $273.50
AA133381 - Dell 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: AA133381
Price: $273.50
Dell SNPRGM6CC/16G 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: SNPRGM6CC-16G
Price: $273.50
AA281953 - Dell 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: AA281953
Price: $273.50
AA286624 - Dell 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: AA286624
Price: $273.50
AA400434 - Dell 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: AA400434
Price: $273.50
AA101753 - Dell 16GB PC4-21300 DDR4-2666MHz non-ECC Unbuffered CL19 UDIMM 1.2V Dual-Rank Memory Module
SKU: AA101753
Price: $294.74
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.