HP 656596-B21 530T 10Gb Ethernet Network Adapter

Name: HP 656596-B21 530T 10Gb Ethernet Network Adapter
Brand: HP
SKU: 656596-B21

Deliver 10Gb dual-port Ethernet connectivity to HP ProLiant Gen8 servers with the HP 530T adapter.

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Overview

The HP 656596-B21 530T is a dual-port 10Gb Ethernet network adapter engineered for HP ProLiant Gen8 servers that require high-speed, low-latency network connectivity. Built around a PCI Express 2.0 x8 interface, the adapter delivers two independent 10GBase-T ports using standard RJ-45 connectors, allowing organizations to leverage existing copper cabling infrastructure for 10Gb networking without the additional expense of fiber optic transceivers and cabling. Each port operates independently, supporting configurations ranging from simple dual-network connectivity to link aggregation and automatic failover.

Validated for use with the HP ProLiant DL385p Gen8, ML350e Gen8, ML350p Gen8, SL270s Gen8, SL4540 Gen8, and SL4545 G7, the 530T integrates with HP's server management ecosystem for monitoring and configuration. The dual 10Gb ports make it particularly well-suited for virtualized environments where multiple virtual machines share network resources, or for storage-heavy workloads where network throughput directly impacts performance. For administrators managing ProLiant Gen8 infrastructure who need to step up from Gigabit networking, the 530T provides a validated and cost-effective upgrade path.

Key Features

Networking

Gigabit Ethernet

Specifications

Brand

Model

656596-B21 (530T)

Interface

PCI Express 2.0 x8

Ports

2 x 10Gb Ethernet (RJ-45)

Speed

10 Gbps per port

Connector Type

RJ-45 (10GBase-T)

Compatible Servers

HP ProLiant DL385p Gen8, ML350e Gen8, ML350p Gen8, SL270s Gen8, SL4540 Gen8, SL4545 G7

Pros & Cons

👍 Pros

Dual 10Gb Ethernet ports provide high-bandwidth connectivity or redundancy from a single adapter.
RJ-45 copper connections use standard Cat6a/Cat7 cabling, avoiding the cost of fiber optic infrastructure.
Designed and validated by HP for seamless integration with ProLiant Gen8 server platforms.
Helps reduce network congestion in virtualized and data-intensive server environments.
Supports link aggregation and failover for improved throughput and network resilience.

👎 Cons

Compatibility is limited to specific HP ProLiant Gen8 models, restricting use in non-HP or newer-generation servers.
PCI Express 2.0 x8 interface is an older generation, which may limit upgrade path flexibility.
10GBase-T over copper requires Cat6a or better cabling for full 10Gb performance at longer distances.
Dual-port only — environments needing more than two 10Gb connections will require additional adapters.
No SFP+ option for fiber connectivity on this model.

Frequently Asked Questions

What servers is the HP 530T compatible with?

The HP 530T (656596-B21) is compatible with select HP ProLiant Gen8 servers including the DL385p, ML350e, ML350p, SL270s, SL4540, and the SL4545 G7.

What type of connectors does this adapter use?

The adapter uses two RJ-45 connectors for standard copper Ethernet cabling, supporting 10GBase-T connections.

What PCI Express slot does the HP 530T require?

It requires a PCI Express 2.0 x8 slot for full bandwidth utilization.

Can both ports operate at 10Gb simultaneously?

Yes, both ports are independent 10Gb Ethernet interfaces that can operate simultaneously for a combined potential throughput of 20Gb.

Does this adapter support link aggregation or teaming?

Yes, the dual ports can be configured for link aggregation (LACP), failover, or independent network connections depending on your server OS and network configuration.