What Ethernet speed does each port support?

Each port supports 10/100/1000 Mbps full-duplex. The adapter is also described as delivering 2 Gb/s bi-directional Ethernet transfer rate per port, which is the concrete performance figure given in the provided data.

What is the total throughput of the adapter?

The provided specifications state 8 Gb/s aggregate full-duplex theoretical bandwidth per adapter. That figure applies to the quad-port design when all four 1GbE ports are considered together.

What interface does the adapter use in the server?

It is listed as a PCI Express 2.0 x4 adapter. The data also says it is mechanically compatible with x8 and x16 PCI Express slots.

Which chipset is used on this adapter?

The adapter uses the Broadcom BCM5719 chipset. That chipset detail is included in the provided specifications and can be used for platform and compatibility review.

684208-B21 - HP 684208-B21 4-port 1GbE FlexibleLOM Adapter

Name: HP 684208-B21 4-port 1GbE FlexibleLOM Adapter
Brand: HP
SKU: 684208-B21
Price: 148 USD
Availability: InStock

684208-B21 - HP 684208-B21 4-port 1GbE FlexibleLOM Adapter | US IT Hardware

Product overview

The HP Ethernet 1Gb 4-port 331FLR FlexibleLOM Adapter, SKU 684208-B21, is a quad-port Ethernet network adapter for HPE ProLiant rack server environments. It uses a FlexibleLOM form factor and provides four 1GbE ports with 10/100/1000 Mbps full-duplex operation. The adapter delivers 2 Gb/s bi-directional Ethernet transfer rate per port and up to 8 Gb/s aggregate full-duplex theoretical bandwidth per adapter. It is based on the Broadcom BCM5719 chipset and is identified as a PCI Express 2.0 x4 adapter, with mechanical compatibility for x8 and x16 PCIe slots. This combination of port density, bandwidth, and interface flexibility makes it suitable for deployments that need multiple 1GbE connections from a single adapter. The provided data also identifies the adapter as a FlexibleLOM solution for select HPE ProLiant servers.

Quad-port 1GbE network adapter
10/100/1000 Mbps full-duplex
8 Gb/s aggregate full-duplex
Broadcom BCM5719 chipset
PCIe 2.0 x4 interface
FlexibleLOM form factor

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Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	684208-B21
Brand	HP
Condition	Refurbished
Model	331FLR FlexibleLOM
Bus Type	PCI Express 2.0
Location	Internal
Form Factor	FlexibleLOM
Adapter Type	Gigabit Ethernet server adapter
Product Line	Ethernet 1Gb 4-port 331FLR Adapter
Product Type	Server network adapter
Compatibility Notes	FlexibleLOM Adapter for HP ProLiant Gen8 servers

Best for

Virtualization
The adapter provides four 1GbE ports and up to 8 Gb/s aggregate full-duplex theoretical bandwidth, which supports multi-connection virtualized server workloads.
Server consolidation
A single quad-port adapter can provide multiple Ethernet connections from one card, helping consolidate network interfaces in HPE ProLiant rack server environments.
Network segmentation
Four separate 1GbE ports allow distinct network paths to be assigned from one adapter, which is useful where segmentation is required.
Rack server networking
The adapter is identified as a FlexibleLOM solution for select HPE ProLiant rack servers and supports PCI Express 2.0 x4 interface use.

Frequently asked questions

How many network ports does this adapter provide?

It provides four Ethernet ports. The product data identifies it as a 4-port 331FLR FlexibleLOM adapter, and the specification list states four 1GbE ports with 10/100/1000 Mbps full-duplex operation.

Details

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Total Data Transfer Rate	1000 Mbit/s
Data Transfer Rate per Port	1 Gb/s per port
Duplex Transfer Rate per Port	2 Gb/s full duplex per port

Ports	4 RJ-45 ports
Port Type	RJ-45
Interface Type	PCIe 2.0 x4
Ethernet Standard	10BASE-T; 100BASE-TX; 1000BASE-T
Network Interface	4-port 1GbE

HP 684208-B21 4-port 1GbE FlexibleLOM Adapter