# Mellanox ConnectX-4 Lx MCX4121A-ACUT Dual-Port 25GbE SFP28 Network Interface Card

**URL:** https://aio.lv/en/product--level-one-games-mcx4121a-acut--12572592
**Data updated:** 2026-07-09 14:54 (EEST)
**Category:** Network Cards
**Manufacturer:** Level One Games
**Manufacturer code:** MCX4121A-ACUT
**EAN:** 7290108481730
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 308.49 €
**Prices and availability valid until:** 2026-08-10 23:59
**Price without VAT (21%):** 254.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--level-one-games-mcx4121a-acut--12572592

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 31.07.2026 | free |
| Pickup points | 05.08.2026 | 1.89 EUR |
| Courier delivery to door | 05.08.2026 | 4.99 EUR |

## Summary description

The Mellanox ConnectX-4 Lx MCX4121A-ACUT is a high-performance dual-port 25GbE SFP28 network interface card designed for demanding data center environments. Utilizing a PCI Express host interface, this wired adapter supports advanced networking standards including IEEE 802.3by and 802.3cd. It provides reliable, low-latency connectivity for server virtualization and cloud computing applications, ensuring efficient data throughput and robust network management capabilities.

## Long description

The Mellanox ConnectX-4 Lx MCX4121A-ACUT is a high-performance dual-port 25GbE SFP28 network interface card engineered for modern data centers and enterprise environments. This internal adapter utilizes a PCI Express host interface to deliver reliable, low-latency connectivity, making it an essential component for high-speed server infrastructure. By supporting a wide range of Ethernet speeds and advanced offloading technologies, it ensures efficient data processing and optimized network performance for demanding workloads.
Advantages
This network interface card offers exceptional scalability and efficiency through hardware-based I/O isolation, which is critical for maintaining stable performance in virtualized environments. It significantly reduces CPU overhead by utilizing advanced stateless offload engines and RDMA over Converged Ethernet, allowing for higher application productivity. The card is designed to handle massive data throughput with sub-microsecond latency, ensuring that cloud computing and data analytics platforms operate at peak capacity while lowering the total cost of ownership.
Suitable for
Server virtualization and cloud computing
High-performance data analytics and database platforms
Web 2.0 and large-scale storage environments
High-speed network infrastructure requiring low latency
When it may not be suitable
This card is specifically designed for professional data center and enterprise server environments. It is not suitable for standard home desktop PCs or consumer-grade workstations that lack the necessary PCIe slot configuration or professional network infrastructure requirements.
Key specifications
Connectivity: Wired, Ethernet
Host Interface: PCI Express
Ports: Dual-port SFP28
Supported Speeds: 1/10/25/40/50 GbE
Networking Standards: IEEE 802.1Qaz, 802.3ba, 802.3az, 802.3ap, 802.3ae, 802.3ad, 802.1Qbg, 802.1Qbb, 802.1Q, 1588v2, 802.3by, 802.3cd
How to use
Installation requires inserting the card into an available, compatible PCI Express slot on your server motherboard. Once physically installed, ensure the appropriate drivers for your operating system are loaded to enable the network controller. Configure the network settings through your server's management interface or operating system network configuration tools to utilize the dual-port SFP28 connectivity. The card is designed for internal use and should be handled according to standard electrostatic discharge safety protocols.
What to consider before purchase
Verify that your server motherboard has an available PCIe slot compatible with the card's interface.
Ensure your network infrastructure supports SFP28 optical or copper cabling.
Check for compatibility with your specific server operating system and virtualization platform.
Usage recommendations
For optimal performance, ensure that the server's BIOS/UEFI settings are configured to support high-speed PCIe devices and that the latest firmware updates are applied to the network card to leverage all advanced acceleration features.

## Specifications

### Ports & interfaces

| Feature | Value |
|---|---|
| Connectivity technology | Wired |
| Interface | Ethernet |
| Host interface | PCI Express |
| Internal | Yes |
| Fiber ports quantity | 2 |
| Fiber optic connector | SFP, SFP+, SFP28 |

### Network

| Feature | Value |
|---|---|
| Networking standards | IEEE 802.1Qaz, IEEE 802.3ba, IEEE 802.3az, IEEE 802.3ap, IEEE 802.3ae, IEEE 802.3ad, IEEE 802.1Qbg, IEEE 802.1Qbb, IEEE 802.1Q, IEEE 1588v2, IEEE 802.3by, IEEE 802.3cd |
| Ethernet LAN | Yes |

### Design

| Feature | Value |
|---|---|
| Product colour | Green, Silver |

## FAQ

### How much does the Mellanox ConnectX-4 Lx MCX4121A-ACUT Network Card cost, and is it available for purchase?

The price is 308.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 31.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Mellanox ConnectX-4 Lx MCX4121A-ACUT Network Card be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Level One Games products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Level One Games service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: connectivity technology, interface, host interface, networking standards, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/12572592/68937397_large.webp