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CX4121A MCX4121A-ACAT Mellanox ConnectX-4 Lx 25GbE SFP28 PCIe Ethernet Adapter
US $58.90
ApproximatelyC $80.96
or Best Offer
Was US $62.00 (5% off)
Condition:
“100% Fully tested before shipment, good working condition. Looks like new.”
Used
An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections.
More than 10 available699 sold
- Buy It NowCX4121A MCX4121A-ACAT Mellanox ConnectX-4 Lx 25GbE SFP28 PCIe Ethernet Adapter
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Returns:
30 days return. Buyer pays for return shipping. If you use an eBay shipping label, it will be deducted from your refund amount.
Payments:
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Seller assumes all responsibility for this listing.
eBay item number:115511559619
Item specifics
- Condition
- Used
- Seller Notes
- “100% Fully tested before shipment, good working condition. Looks like new.”
- Compatible Brand
- For Mellanox
- External Interfaces
- Ethernet/ Network Cards
- Custom Bundle
- No
- MPN
- MCX4121A-ACAT
- Maximum Data Rate
- 25Gbps
- Brand
- Mellanox
- Form Factor
- CompactFlash
- Type
- Network Interface Controller
- Number of Ports
- 2 Ports
- Manufacturer Warranty
- 1 Year
- Model
- CX4121A
- Country/Region of Manufacture
- China
- Compatible Port
- PCI Express x8
- Internal Interfaces
- SFP
Item description from the seller
Popular categories from this store
Seller feedback (1,887)
This item (64)
All items (1,887)
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseItem as described. It's labelled correctly and it reports correctly in my server. It works correctly with MFT. I was able to update it to the latest Mellanox firmware without issue. The LEDs work. The thermal paste was old, but that was expected; repasting was easy-enough. Item arrived well-packaged, and included both brackets. I suspect this is NOS rather than used, as it looks brand-new.
- *****- Feedback left by buyer.Past yearVerified purchaseItem was in really good state might as well have been new. Surprised me to see the thermal paste was still very liquid, maybe a repaste or the cpu just doesn't get too hot. Tested and works fine, at least for 10G SFP+. No complaints hereReply from: nhlfy411- Feedback replied to by seller nhlfy411.- Feedback replied to by seller nhlfy411.Hi, friend, We truly gratitude for choosing our store for your recent purchase and positive feedback. We are thrilled to hear that you are satisfied with your products. We strive to provide the highest quality products and the best possible service to our valued customers like yourself. Your satisfaction is our top priority. Looking forward to the opportunity to serve you again soon and to building a lasting partnership.
- *****- Feedback left by buyer.Past yearVerified purchaseEverything works like intended, no problems under Proxmox 8 and with Ubiquiti 10/25Gbps DAC connected to Mikrotik switch. NIC was packaged in plastic "box" with low-profile adapter in separate compartment and was in superb condition.Reply from: nhlfy411- Feedback replied to by seller nhlfy411.- Feedback replied to by seller nhlfy411.Hi, friend, We truly gratitude for choosing our store for your recent purchase and positive feedback. We are thrilled to hear that you are satisfied with your products. We strive to provide the highest quality products and the best possible service to our valued customers like yourself. Your satisfaction is our top priority. Looking forward to the opportunity to serve you again soon and to building a lasting partnership.
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseArrived quickly and as described, packed well. Recognized correctly in PC and was able to link at the correct rate with my switch. Great seller.Reply from: nhlfy411- Feedback replied to by seller nhlfy411.- Feedback replied to by seller nhlfy411.Thank you so much for taking the time to share your positive experience with our product! Your feedback truly brightens our day and reinforces our commitment to delivering exceptional quality and service. We’re thrilled to hear that the product met your expectations, and it’s customers like you who make our efforts worthwhile. Please don’t hesitate to reach out if you need anything—we’re here to help!
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseThe card arrived in perfect condition, in its box just as it can be seen on the picture. The shipping was quicker than expected, great seller, definitely recommended from my side.
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseCame packaged very well. It was in like new condition. It shipped very fast and arrived earlier than predicted. I have installed, updated firmware, and tested it. Everything worked without a hitch. Great valoe for the cost. This is the second purchase of one of these from this seller. An easy purchase from a great seller. I will use this seller againReply from: nhlfy411- Feedback replied to by seller nhlfy411.- Feedback replied to by seller nhlfy411.Thank you so much for taking the time to share your positive experience with our product! Your feedback truly brightens our day and reinforces our commitment to delivering exceptional quality and service. We’re thrilled to hear that the product met your expectations, and it’s customers like you who make our efforts worthwhile. Please don’t hesitate to reach out if you need anything—we’re here to help!
Product ratings and reviews
Most relevant reviews
- Nov 11, 2024
It's working on my QNAP TS-464.
Verified purchase: YesCondition: NewSold by: nhlfy411
- Aug 30, 2024
Powerful, yet not expensive.
Verified purchase: YesCondition: Pre-OwnedSold by: hkebl-002
- Mar 15, 2019
good condition & performance
Verified purchase: YesCondition: Pre-OwnedSold by: central_valley_computer_parts_inc
- Aug 01, 2025
Worked without issues in my Unraid serve...
Verified purchase: YesCondition: NewSold by: nhlfy411
- Oct 21, 2024
very good
Verified purchase: YesCondition: Pre-OwnedSold by: nhlfy411
This is a private listing and your identity will not be disclosed to anyone except the seller.
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Popular categories from this store
Seller feedback (1,887)
This item (64)
All items (1,887)
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseItem as described. It's labelled correctly and it reports correctly in my server. It works correctly with MFT. I was able to update it to the latest Mellanox firmware without issue. The LEDs work. The thermal paste was old, but that was expected; repasting was easy-enough. Item arrived well-packaged, and included both brackets. I suspect this is NOS rather than used, as it looks brand-new.
- *****- Feedback left by buyer.Past yearVerified purchaseItem was in really good state might as well have been new. Surprised me to see the thermal paste was still very liquid, maybe a repaste or the cpu just doesn't get too hot. Tested and works fine, at least for 10G SFP+. No complaints hereReply from: nhlfy411- Feedback replied to by seller nhlfy411.- Feedback replied to by seller nhlfy411.Hi, friend, We truly gratitude for choosing our store for your recent purchase and positive feedback. We are thrilled to hear that you are satisfied with your products. We strive to provide the highest quality products and the best possible service to our valued customers like yourself. Your satisfaction is our top priority. Looking forward to the opportunity to serve you again soon and to building a lasting partnership.
- *****- Feedback left by buyer.Past yearVerified purchaseEverything works like intended, no problems under Proxmox 8 and with Ubiquiti 10/25Gbps DAC connected to Mikrotik switch. NIC was packaged in plastic "box" with low-profile adapter in separate compartment and was in superb condition.Reply from: nhlfy411- Feedback replied to by seller nhlfy411.- Feedback replied to by seller nhlfy411.Hi, friend, We truly gratitude for choosing our store for your recent purchase and positive feedback. We are thrilled to hear that you are satisfied with your products. We strive to provide the highest quality products and the best possible service to our valued customers like yourself. Your satisfaction is our top priority. Looking forward to the opportunity to serve you again soon and to building a lasting partnership.
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseArrived quickly and as described, packed well. Recognized correctly in PC and was able to link at the correct rate with my switch. Great seller.Reply from: nhlfy411- Feedback replied to by seller nhlfy411.- Feedback replied to by seller nhlfy411.Thank you so much for taking the time to share your positive experience with our product! Your feedback truly brightens our day and reinforces our commitment to delivering exceptional quality and service. We’re thrilled to hear that the product met your expectations, and it’s customers like you who make our efforts worthwhile. Please don’t hesitate to reach out if you need anything—we’re here to help!
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseThe card arrived in perfect condition, in its box just as it can be seen on the picture. The shipping was quicker than expected, great seller, definitely recommended from my side.
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseCame packaged very well. It was in like new condition. It shipped very fast and arrived earlier than predicted. I have installed, updated firmware, and tested it. Everything worked without a hitch. Great valoe for the cost. This is the second purchase of one of these from this seller. An easy purchase from a great seller. I will use this seller againReply from: nhlfy411- Feedback replied to by seller nhlfy411.- Feedback replied to by seller nhlfy411.Thank you so much for taking the time to share your positive experience with our product! Your feedback truly brightens our day and reinforces our commitment to delivering exceptional quality and service. We’re thrilled to hear that the product met your expectations, and it’s customers like you who make our efforts worthwhile. Please don’t hesitate to reach out if you need anything—we’re here to help!