HP 503746-B21 PCI-E Networking NIC
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503746-B21 HP PCI Express Gigabit Fast Ethernet Server Bulk

Availability: In Stock
Part Number#: 503746-B21
List Price was: $112.42
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Short Description:
503746-B21 HP PCI Express Gigabit Fast Ethernet Server Network Interface Card. New Bulk Pack.

Interface Types of This Product: NIC PCI-E

Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
30 Days
We are giving specifications below, why one should consider procuring HP PCI-E NIC Networking features, a general overview, description, performance specification, relevant images, a competitive price infographic, and technical information about the 503746-B21 model with compatibility.

Performance and Compatibility

Performance and compatibility are critical factors to consider when selecting a network interface card for your server. The performance of a network interface card can impact the overall speed and efficiency of your network, while compatibility ensures that the card will work with your existing hardware and software.

When it comes to performance, the HP PCI Express Gigabit Fast Ethernet Server Network Interface Card delivers high-speed data transfer rates of up to 1Gbps, providing fast and reliable network connectivity. The card also supports jumbo frames, allowing for larger data payloads to be transferred with less overhead.

In terms of compatibility, the HP PCI Express Gigabit Fast Ethernet Server Network Interface Card is designed to work with a wide range of servers and operating systems, including Windows, Linux, and VMware. The card is also compatible with PCI Express x1, x4, x8, and x16 slots, providing flexibility in server configuration.

The HP PCI Express Gigabit Fast Ethernet Server Network Interface Card also supports a range of networking protocols, including TCP/IP, UDP/IP, and IPX/SPX, ensuring seamless integration with your existing network infrastructure. The card also supports VLAN tagging, allowing for network segmentation and improved security.

Fast Ethernet Server Network Interface Card

A Fast Ethernet Server Network Interface Card (NIC) is a type of network adapter that is designed to provide high-speed network connectivity for servers. Fast Ethernet is an older networking standard that provides data transfer rates of up to 100Mbps, which is ten times faster than traditional Ethernet.

A Fast Ethernet Server NIC typically connects to a server through a PCI or PCI Express slot, and provides a reliable and high-speed connection to the network. Fast Ethernet Server NICs are commonly used in small to medium-sized networks, and are often used in conjunction with switches and routers to provide fast and efficient data transfer.

Some of the key benefits of using a Fast Ethernet Server NIC include improved network performance, faster data transfer rates, and increased reliability. Fast Ethernet Server NICs can also support a range of networking protocols, such as TCP/IP and UDP/IP, and can be configured to support features such as VLAN tagging and Quality of Service (QoS).

However, Fast Ethernet is an older networking standard, and has been largely superseded by newer technologies such as Gigabit Ethernet and 10 Gigabit Ethernet. While Fast Ethernet Server NICs can still provide reliable network connectivity, they may not be able to keep up with the demands of modern high-speed networks.

Troubleshooting and Maintenance

Like any network device, the HP PCI Express Gigabit Fast Ethernet Server Network Interface Card may require troubleshooting and maintenance from time to time. Here are some tips and best practices for troubleshooting and maintaining the card:

  • Check network cables and connections: Ensure that the network cables are properly connected and the connectors are clean and free of debris. Faulty cables and connectors can cause network issues.
  • Verify network settings: Make sure that the network settings on the server and the network interface card are correct, including IP address, subnet mask, and default gateway.
  • Update drivers and firmware: Keep the network interface card drivers and firmware up-to-date to ensure optimal performance and compatibility.
  • Check for conflicts with other devices: Make sure that there are no conflicts with other devices on the network, such as IP address conflicts or duplicate MAC addresses.
  • Use diagnostic tools: The HP PCI Express Gigabit Fast Ethernet Server Network Interface Card may come with diagnostic tools that can help troubleshoot network issues. Use these tools to identify and resolve issues.
  • Monitor network performance: Monitor network performance using tools such as SNMP (Simple Network Management Protocol) or packet analyzers to identify network issues and performance bottlenecks.

In terms of maintenance, here are some best practices:

  • Keep the network interface card clean: Dust and debris can accumulate on the card, leading to overheating and performance issues. Clean the card regularly with compressed air.
  • Check for physical damage: Inspect the card for physical damage, such as bent or broken connectors, and replace the card if necessary.
  • Keep the server and network infrastructure up-to-date: Make sure that the server and network infrastructure, including switches and routers, are up-to-date with the latest software and firmware updates to ensure compatibility and optimal performance.

By following these tips and best practices, you can ensure that the HP PCI Express Gigabit Fast Ethernet Server Network Interface Card is properly maintained and troubleshooted, and that your network continues to operate smoothly and efficiently.

General Information

  • Manufacturer: HP
  • MPN: 503746-B21
  • Device Type : Network Adapter
  • SKU: 503746-B21
  • Form Factor : Plug-In Card - Low Profile
  • Interface (Bus) Type : Pci Express X1
  • Spare Part: NC112T


  • Connectivity Technology : Wired
  • Cabling Type : Ethernet 10base-T, Ethernet 100base-Tx, Ethernet 1000BASE-T
  • Data Link Protocol : Ethernet, Fast Ethernet, Gigabit Ethernet
  • Data Transfer Rate : 1 GBPS
  • Status Indicators : Link Activity, Port Transmission Speed
  • Features : Auto-Negotiation, Wake On Lan (WOL)

Compliant Standards

  • IEEE 802.3, IEEE 802.3U, IEEE 802.1Q, IEEE 802.3AB, IEEE 802.1P,
  • IEEE 802.3X, IEEE 802.3AD (LACP)

Expansion / Connectivity

  • Interfaces : 1 X Network - Rj-45
  • Compatible Slots : 1 X Pci Express X1
  • Processor / Memory:
  • Processor : 1 X 82574l - Intel
  • Ram : 32 KB


  • Compliant Standards: ACPI, FCC Class B certified, UL, VCCI Class B ITE, BSMI CNS 13438 Class A, CISPR 22 Class B, EN 60950, UL 1950, VCCI-II, EN55024, EN55022 Class B, ICES-003 Class B, MIC, ACA

Software / System Requirements

  • OS Required: SuSE Linux Enterprise Server, SunSoft Solaris 9, SCO OpenServer 5.0.7, Microsoft Windows Server 2003 Enterprise Edition, Microsoft Windows Server 2003 Web Edition, Microsoft Windows Server 2003 Standard Edition, Microsoft Windows Server 2003, UnixWare 7.1.3, Novell NetWare 6.5, Microsoft Windows Small Business Server 2003, Red Hat Enterprise Linux, UnixWare 7.1.4, SunSoft Solaris 10, Microsoft Windows Server 2003 Standard x64 Edition, Microsoft Windows Server 2003 Enterprise x64 Edition, SCO OpenServer 6

Dimensions & Weight

  • Depth: 5.1 in
  • Height: 2.2 in
  • Environmental Parameters
  • Min Operating Temperature: 32 °F
  • Max Operating Temperature: 131 °F

About New Bulk Pack Products

New Bulk Pack products come with clamshell boxes and do not have any manufacturer warranty. Many times manufacturers disassemble whole units to use parts or pulled from a new system. Typically, this product doesn't come with software or instructions unless indicated and no Manufacturer’s genuine warranty. You can take note these are not brand new products.

Adding gigabyte network connectivity is one of the best decisions users can make in the modern world. This is what the NIC (Network Interface Card) offers. This highly advanced networking device offers users a dedicated computer network connection.

The network interface card's ability to support wired and wireless network communications makes it one of the best choices. Individual users and IT professionals will find them very useful.

NIC enables adequate communication between computers. The computers may either be connected over a Local Area Network or over larger-scale networks via an IP. Regardless of the connection type, the network interface card offered at AllHDD works at optimal rates.

When users choose network interface card options here, they get the most reliable hardware circuitry. That is, there's a synergy between a data link and a physical layer in one device. The circuitry enables the physical layer to process data so that the processes involving the data link layer can run effectively on it.

Gone are the days when network controllers were the real deals. Today, a network interface card can serve as an expansion module in computer systems or routers. The specifications of the NIC users will get correspond with the standard of various network options.

Network Interface Card Options

Internal Network Interface Cards

Users will find NIC (Network Interface Cards) that users can insert directly onto the computer's motherboard. For these options to offer network access, there's the need for network cables. There are NIC options that use connections like Peripheral Component Interconnect (PCI). Others connect with Industry Standard Architecture (ISA).

External Network Interface Cards

Laptops and desktops which do not come with an internal network interface card use the external option. There are two options for the external NIC. The first is the wireless network cards, which will be attached directly to the motherboard.

Unlike the internal option, there will be no need for networking cables in this case. These options are the best when users need to travel or access wireless signals.

On the other hand, there are several USB options ranging from 1 port to 4 port NIC. They are compact, and they add a network connection to a USB-enabled computer system. Many of these NIC options work with 10-100-1000 Mbps networks.

They are also ideal replacements for local area network (LAN) adapters and similar laptop accessories. Users will find USB network interface cards that support features such as VLAN tagging, Jumbo Frames, and Wake on LAN (WOL). They are the most reliable Gigabit network for versatile home and business use.

Key Features

  • Fast and Reliable Performance. The network interface cards have impressive speed rating with options up to 1000 Mbps. They enable the connection of multiple computers without the fear of failure.
  • Updated and Incorruptible Driver. The driver that passes data between the NIC and the computer system ensures optimal performance.
  • Connectivity LED. These NIC (Network Interface Cards) come with integrated LED indicators to notify users when there is a network connection and transfer of data.

Here, you can check more available conditions of your desired product 503746-B21 at a competitive price. We are trying our best to meet your needs on the enterprise-level computer, server, data centre, and networking hardware. You are welcome to ask our live chat or get live representative support over the phone.


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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

Free Technical support on purchased items, our expert consultancy over the phone, by email, by live chat, or by remote login.


Shipping Options and Estimated Delivery Time

UPS Shipping Options:

FREE UPS® Ground (Free shipping to all orders for 48 states!)
Estimated delivery time: 4-7 business days

UPS 3 Day Select®
Estimated delivery time: 3 business days

UPS 2nd Day Air®
Estimated delivery time: 1-2 business days, Delivery by 10:30 AM or 2:00 PM

UPS Next Day Air® Standard Overnight
Estimated delivery time: Overnight 2-5 PM, Standard Overnight Delivery.

UPS Next Day Air® - Priority Overnight
Estimated delivery time: Overnight Delivery (Next Business Day) Delivery by 10:30 AM or 12:00 PM

UPS Next Day Air® First Overnight - Early A.M
Estimated delivery time: Overnight 8:00 AM, Early morning, overnight delivery for your time-critical shipments.

UPS® First Overnight - Saturday
Estimated delivery time: Overnight 8:30 AM – Saturday

FedEx Shipping Options:

FedEx Ground®
Estimated delivery time: (4–7 business days in the contiguous 48 states)
*For residential delivery via FedEx Ground use FedEx Home Delivery®
Estimated delivery time: 4−7 business days, based on the distance to the destination.

FedEx Express Saver®
Estimated delivery time: 3 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states (except Hawaii and Alaska)

FedEx 2Day®
Estimated delivery time: 2 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states

FedEx Standard Overnight®
Estimated delivery time: Next-business-day (by 4:30 PM to U.S. businesses and by 8:00 PM to residences)
Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
Estimated delivery time: Next-business-day (by 10:30 PM to U.S. businesses, noon to most residences)
Available throughout all 50 states

FedEx First Overnight®
Estimated delivery time: Next-business-day (by 8:30 or 9 AM to most areas)
Available throughout all 50 states

Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

  • The processing of orders with Ground Shipping can take up to 24-48 hours. But we try to process all orders the same day.
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  • If you have any specific delivery time requirements, please contact our customer support and someone from our customer service team will be able to help you.
  • You can estimate the shipping cost from the products detail page, also available on the checkout page
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  • Shipping cut off 4:00 PM (Monday-Friday) and available blind drop shipment.