Replacement for ZMK-0021-S: Drop-In Alternatives We Stock
Looking for a replacement for the ZMK-0021-S (ZMK-0021-S - Supermicro 1GB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module)? Pro Disk Network ships Supermicro 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 ZMK-0021-S
| SKU | ZMK-0021-S |
|---|---|
| Product | ZMK-0021-S - Supermicro 1GB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module |
| Current price | $148.13 |
| Stock status | In Stock |
| Detail page | View ZMK-0021-S › |
Drop-in replacements for ZMK-0021-S
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.
Supermicro D21RB1GW/K4H510838CU 1GB DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory Module
SKU: D21RB1GW-K4H510838CU
Price: $124.32
MEM-DR110-KL01 - Supermicro 1GB DDR DDR-333MHz PC2700 ECC Registered CL2.5 184-Pin DIMM Memory Module
SKU: MEM-DR110-KL01
Price: $179.28
MEM-DR110-ML01 - Supermicro 1GB DDR DDR-333MHz PC2700 ECC Registered CL2.5 2.5V 184-Pin DIMM Memory Module
SKU: MEM-DR110-ML01
Price: $179.28
CT366513 - Crucial 1GB DDR-400 MHz PC3200 non-ECC Unbuffered CL3 184-Pin DIMM Memory Module upgrade for Supermicro SUPER P4SCT+II
SKU: CT366513
Price: $91.93
CT325783 - Crucial 1GB DDR-400 MHz PC3200 non-ECC Unbuffered CL3 184-Pin DIMM Memory Module upgrade for Supermicro SUPER 370SDA
SKU: CT325783
Price: $91.93
CT366565 - Crucial 1GB DDR-400 MHz PC3200 non-ECC Unbuffered CL3 184-Pin DIMM Memory Module upgrade for Supermicro SUPER P4SCT+
SKU: CT366565
Price: $91.93
CT366607 - Crucial 1GB DDR-400 MHz PC3200 non-ECC Unbuffered CL3 184-Pin DIMM Memory Module upgrade for Supermicro SUPER P4SCi
SKU: CT366607
Price: $91.93
CT309121 - Crucial 1GB DDR-400 MHz PC3200 non-ECC Unbuffered CL3 184-Pin DIMM Memory Module upgrade for Supermicro SUPER P4SCE
SKU: CT309121
Price: $91.93
CT301456 - Crucial 1GB DDR-400 MHz PC3200 non-ECC Unbuffered CL3 184-Pin DIMM Memory Module upgrade for Supermicro SUPER P4SAA
SKU: CT301456
Price: $91.93
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.