Replacement for X6991A: Drop-In Alternatives We Stock
Looking for a replacement for the X6991A (X6991A - Sun 128MB 33MHz PC133 ECC Unbuffered CL3 168-Pin DIMM Memory Module)? 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 X6991A
| SKU | X6991A |
|---|---|
| Product | X6991A - Sun 128MB 33MHz PC133 ECC Unbuffered CL3 168-Pin DIMM Memory Module |
| Current price | $105.75 |
| Stock status | In Stock |
| Detail page | View X6991A › |
Drop-in replacements for X6991A
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.
SG-XFCE-6410-N - Sun JNI Single Port Fibre Channel 1Gb/s 33MHz PCI Host Bus Adapter for Sun Fire 12K
SKU: SG-XFCE-6410-N
Price: $250.53
370-3801 - Sun 128MB 100MHz PC100 non-ECC Unbuffered CL2 168-Pin DIMM Memory Module
SKU: 370-3801
Price: $136.66
370-3801-01 - Sun 128MB 100MHz PC100 non-ECC Unbuffered CL2 168-Pin DIMM Memory Module
SKU: 370-3801-01
Price: $136.66
X7035A - Sun 128MB 100MHz PC100 non-ECC Unbuffered CL2 168-Pin DIMM Memory Module
SKU: X7035A
Price: $136.66
Dataram DRSB150/256MB 256MB 133MHz PC133 ECC Unbuffered CL3 168-Pin DIMM Memory Module for Sun X6180A Sun Blade 150
SKU: DRSB150-256MB
Price: $143.39
X7038A - Sun 256MB Kit (2 X 128MB) EDO ECC Fully Buffered DIMM 168-Pin Memory for Ultra 10 Series Model 360
SKU: X7038A
Price: $99.83
X6179A - Sun 128MB SDRAM-133MHz PC133 ECC Registered CL3 168-Pin DIMM Memory Module
SKU: X6179A
Price: $111.28
370-4289-01 - Sun 128MB 133MHz PC133 ECC Registered CL3 168-Pin DIMM Memory Module
SKU: 370-4289-01
Price: $111.28
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.