Replacement for D21GX43OPT: Drop-In Alternatives We Stock
Looking for a replacement for the D21GX43OPT (D21GX43OPT - PNY 1GB Kit (2 X 512MB) DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory)? Pro Disk Network ships 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 D21GX43OPT
| SKU | D21GX43OPT |
|---|---|
| Product | D21GX43OPT - PNY 1GB Kit (2 X 512MB) DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory |
| Current price | $150.79 |
| Stock status | In Stock |
| Detail page | View D21GX43OPT › |
Drop-in replacements for D21GX43OPT
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.
PNY K-DIMM1GBN/4300/2-BX 1GB Kit (2 X 512MB) DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory
SKU: K-DIMM1GBN-4300-2-BX
Price: $150.79
MD1024KD2-533 - PNY 1GB Kit (2 X 512MB) DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory
SKU: MD1024KD2-533
Price: $150.79
PNY K-SODI1GBN/4300/2-BX 1GB Kit (2 X 512MB) DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 200-Pin SoDimm Single Rank Memory
SKU: K-SODI1GBN-4300-2-BX
Price: $166.33
PNY K-SODI2GBN/4300/2-BX 2GB Kit (2 X 1GB) DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 200-Pin SoDimm Memory
SKU: K-SODI2GBN-4300-2-BX
Price: $170.45
PNY K-DIMM2GBN/4300/2-BX 2GB Kit (2 X 1GB) DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory
SKU: K-DIMM2GBN-4300-2-BX
Price: $170.45
Dataram DRST2000/1GB 1GB Kit (2 X 512MB) DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM Memory for Sun Sparc Enterprise T1000 Server
SKU: DRST2000-1GB
Price: $189.12
D512X42OPT - PNY 512MB DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory Module
SKU: D512X42OPT
Price: $79.36
MN0512SD2-533 - PNY 512MB DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 200-Pin SoDimm Single Rank Memory Module
SKU: MN0512SD2-533
Price: $87.55
PNY DIMM101GBN/4300/2-BX 1GB DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory Module
SKU: DIMM101GBN-4300-2-BX
Price: $81.80
64A0TFTHE-533 - PNY 1GB DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Single Rank Memory Module
SKU: 64A0TFTHE-533
Price: $81.80
MD1024SD2-533-A1 - PNY 1GB DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory Module
SKU: MD1024SD2-533-A1
Price: $89.70
PNY SODI101GBN/4300/2-BX 1GB DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 200-Pin SoDimm Dual Rank Memory Module
SKU: SODI101GBN-4300-2-BX
Price: $89.70
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.