Replacement for 21H6512: Drop-In Alternatives We Stock
Looking for a replacement for the 21H6512 (21H6512 - IBM 128MB DIMM Memory Module for AS/400)? Pro Disk Network ships IBM 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 21H6512
| SKU | 21H6512 |
|---|---|
| Product | 21H6512 - IBM 128MB DIMM Memory Module for AS/400 |
| Current price | $71.58 |
| Stock status | In Stock |
| Detail page | View 21H6512 › |
Drop-in replacements for 21H6512
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.
33L3321 - IBM 128MB 133MHz PC133 ECC Registered CL3 168-Pin DIMM Memory Module
SKU: 33L3321
Price: $71.58
28L1015 - IBM 128MB 100MHz PC100 ECC Registered CL2 168-Pin DIMM Memory Module
SKU: 28L1015
Price: $71.58
33L3074 - IBM 128MB 133MHz PC133 non-ECC Unbuffered CL3 168-Pin DIMM Memory Module
SKU: 33L3074
Price: $71.58
10K0018 - IBM 128MB 133MHz PC133 ECC Registered CL3 168-Pin DIMM Memory Module
SKU: 10K0018
Price: $71.58
10K0019 - IBM 128MB 133MHz PC133 ECC Registered CL3 168-Pin DIMM Memory Module
SKU: 10K0019
Price: $71.58
33L3123 - IBM 128MB 133MHz PC133 ECC Registered CL3 168-Pin DIMM Memory Module
SKU: 33L3123
Price: $71.58
33L3113 - IBM 128MB 100MHz PC100 ECC Registered CL2 168-Pin DIMM Memory Module
SKU: 33L3113
Price: $71.58
38L3568 - IBM 128MB 66MHz PC66 non-ECC Unbuffered CL3 168-Pin DIMM Memory Module
SKU: 38L3568
Price: $71.58
33L3124 - IBM 128MB 133MHz PC133 ECC Registered CL3 168-Pin DIMM 3.3V Memory Module
SKU: 33L3124
Price: $71.58
33L3082 - IBM 128MB 133MHz PC133 ECC Unbuffered CL3 168-Pin DIMM Memory Module
SKU: 33L3082
Price: $85.93
10K0045 - IBM 128MB 133MHz PC133 ECC Unbuffered CL3 168-Pin DIMM Memory Module
SKU: 10K0045
Price: $85.93
38L3082 - IBM 128MB 133MHz PC133 ECC Unbuffered CL3 168-Pin DIMM Memory Module
SKU: 38L3082
Price: $85.93
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.