Replacement for KD421RDK64: Drop-In Alternatives We Stock
Looking for a replacement for the KD421RDK64 (KD421RDK64 - Kingston 64GB Kit (4 X 16GB) DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM Dual Rank Memory)? Pro Disk Network ships Kingston 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 KD421RDK64
| SKU | KD421RDK64 |
|---|---|
| Product | KD421RDK64 - Kingston 64GB Kit (4 X 16GB) DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM Dual Rank Memory |
| Current price | $358.37 |
| Stock status | In Stock |
| Detail page | View KD421RDK64 › |
Drop-in replacements for KD421RDK64
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.
Kingston Technology KVR21R15D4K4/64I 64GB Kit (4 X 16GB) DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Dual Rank Memory
SKU: KVR21R15D4K4-64I
Price: $358.37
Kingston Technology KVR21R15D4K4/64 64GB Kit (4 X 16GB) DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Dual Rank Memory
SKU: KVR21R15D4K4-64
Price: $358.37
Kingston Technology HX421C14FBK4/64 64GB Kit (4 X 16GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 288-Pin DIMM 1.2V Memory
SKU: HX421C14FBK4-64
Price: $907.39
Kingston Technology HX421S14IBK4/64 64GB Kit (4 X 16GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 260-Pin SoDimm 1.2V Memory
SKU: HX421S14IBK4-64
Price: $932.03
Kingston Technology HX421C14FBK8/64 64GB Kit (8 X 8GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 288-Pin DIMM 1.2V Memory
SKU: HX421C14FBK8-64
Price: $1,011.43
Kingston Technology KVR21N15S8K2/16 16GB Kit (2 X 8GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 288-Pin DIMM 1.2V Single Rank Memory
SKU: KVR21N15S8K2-16
Price: $242.83
Kingston Technology HX421C13PBK4/16 16GB Kit (4 X 4GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 288-Pin DIMM 1.2V Dual Rank Memory
SKU: HX421C13PBK4-16
Price: $243.47
Kingston Technology KVR21S15S8K2/16 16GB Kit (2 X 8GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 260-Pin SoDimm 1.2V Single Rank Memory
SKU: KVR21S15S8K2-16
Price: $263.07
Kingston Technology KVR21N15D8K2/16 16GB Kit (2 X 8GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 288-Pin DIMM 1.2V Dual Rank Memory
SKU: KVR21N15D8K2-16
Price: $263.07
Kingston Technology HX421C14FBK2/16 16GB Kit (2 X 8GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 288-Pin DIMM 1.2V Memory
SKU: HX421C14FBK2-16
Price: $272.50
Kingston Technology HX421C14FB2K2/16 16GB Kit (2 X 8GB) DDR4-2133MHz PC4-17000 non-ECC Unbuffered CL15 288-Pin DIMM 1.2V Memory
SKU: HX421C14FB2K2-16
Price: $272.50
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.