Alternative to KD421SR4G: Better-Value Equivalents in Stock
Comparing the KD421SR4G (KD421SR4G - Kingston 4GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank x8 Memory Module w/TS) against alternatives? Pro Disk Network stocks 12 similar Kingston parts that offer comparable performance at different price points. Each option below is in-stock, US-warehoused, and tested-and-certified before ship. Bulk pricing is available on quantities of 5+; B2B procurement can use Net 30 with PO.
About the KD421SR4G
| SKU | KD421SR4G |
|---|---|
| Product | KD421SR4G - Kingston 4GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank x8 Memory Module w/TS |
| Current price | $85.24 |
| Stock status | In Stock |
| Detail page | View KD421SR4G › |
Alternatives to KD421SR4G
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 KVR21R15S8/4I 4GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank Memory Module
SKU: KVR21R15S8-4I
Price: $85.24
Kingston Technology KVR21R15S8/4 4GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank Memory Module
SKU: KVR21R15S8-4
Price: $85.24
Kingston Technology KVR21R15S8K4/16 16GB Kit (4 X 4GB) DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank Memory
SKU: KVR21R15S8K4-16
Price: $315.37
Kingston Technology KVR21R15S8K4/16I 16GB Kit (4 X 4GB) DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank Memory
SKU: KVR21R15S8K4-16I
Price: $315.37
Kingston Technology KVR21R15S4/8I 8GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank Memory Module
SKU: KVR21R15S4-8I
Price: $89.12
Kingston Technology KTL-TS421/8G 8GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Memory Module
SKU: KTL-TS421-8G
Price: $89.12
Kingston Technology KVR21R15S4/8HA 8GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank Memory Module
SKU: KVR21R15S4-8HA
Price: $89.12
Kingston Technology KTD-PE421/8G 8GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank Memory Module
SKU: KTD-PE421-8G
Price: $89.12
Kingston Technology KTM-SX421/8G 8GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Memory Module
SKU: KTM-SX421-8G
Price: $89.12
Kingston Technology KVR21R15S4/8 8GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Single Rank Memory Module
SKU: KVR21R15S4-8
Price: $89.12
Kingston Technology KTH-PL421/8G 8GB DDR4-2133MHz PC4-17000 ECC Registered CL15 288-Pin DIMM 1.2V Memory Module
SKU: KTH-PL421-8G
Price: $89.12
How we pick alternatives
Every recommendation above was selected using these criteria:
- Spec parity — capacity, speed, port count, and form factor matched within a 10% tolerance
- Price spread — alternatives shown across the price range, so you can pick on budget
- Brand mix — both OEM-equivalent and trusted aftermarket, all certified
- Reliability data — preferred parts have failure rates below 1% in our 18-month return tracking
- In stock today — shipping today, not 4-6 weeks from now
Want a side-by-side spec comparison?
We can prepare a written comparison covering throughput, power draw, form factor and validated compatibility. Email sales@prodisknetwork.com or call +1 (407) 205-8454 — most quotes ship within 4 business hours.