{"product_id":"hp-331flr-network-adapter-629135-b21-quad-1gb-flex-lom","title":"HP 331FLR Network Adapter 629135-B21 - Quad 1Gb Flex LOM","description":"\u003cp\u003eIn this review the HP 331FLR Network Adapter 629135-B21 is assessed as a compact, high-density Ethernet option for data centers running select HP ProLiant Gen8 rack servers. The bottom line: it is for administrators who need consistent line-rate 1 Gb performance across four ports while keeping power draw low. Tested in virtualized and consolidated server environments, the adapter delivers predictable throughput and a small footprint, making it a practical choice when maximum port density and efficient power use matter more than 10 Gb uplinks.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuad 1 Gb ports:\u003c\/strong\u003e Provides four full line-rate Ethernet ports, enabling up to 4 Gb aggregate throughput for bandwidth-hungry virtualized workloads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible LOM form factor:\u003c\/strong\u003e The Flex LOM design integrates into compatible HP ProLiant Gen8 servers to free up PCIe slots and simplify server networking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power consumption:\u003c\/strong\u003e Single-chip implementation reduces power draw for four ports compared with multiple discrete controllers, helping lower server power budgets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCI Express 2.0 x4 interface:\u003c\/strong\u003e Uses a PCIe 2.0 x4 bus interface to connect to the host with sufficient lanes for consistent 1 Gb performance per port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh port density:\u003c\/strong\u003e Small physical dimensions allow dense networking in rack servers where space is at a premium.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe HP 331FLR is aimed at IT teams running select HP ProLiant Gen8 rack servers who prioritize port density and predictable 1 Gb performance for virtualization, server consolidation, or network segmentation tasks. It is a good fit where multiple 1 Gb endpoints must be provided from a single server slot without adding significant power or heat.\u003c\/p\u003e\n\u003cp\u003eThose who need faster uplinks such as 10 Gb or 25 Gb, or who are working with non-HP Gen8 platforms, should look elsewhere. The adapter is specialized for compatible HP server hardware and for environments that can make use of four dedicated 1 Gb ports rather than fewer higher-speed links.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDelivers full line-rate across four 1 Gb ports, useful for steady aggregate throughput up to 4 Gb.\u003c\/li\u003e\n\u003cli\u003eFlexible LOM form factor preserves PCIe slots and simplifies integration in supported HP ProLiant Gen8 servers.\u003c\/li\u003e\n\u003cli\u003eSingle-chip design reduces power consumption compared with multiple-controller solutions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLimited to 1 Gb per port, so it is not suitable where 10 Gb or faster links are required.\u003c\/li\u003e\n\u003cli\u003eCompatibility is tied to select HP ProLiant Gen8 rack servers, limiting cross-platform use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eHP Ethernet 1Gb 4-port 331FLR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e4 x 1 Gb Ethernet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface (Bus)\u003c\/td\u003e\n\u003ctd\u003ePCI Express 2.0 x4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003eFlex LOM (LOM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (WxDxH)\u003c\/td\u003e\n\u003ctd\u003e11.8 cm x 7.6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesigned For\u003c\/td\u003e\n\u003ctd\u003eSelect HP ProLiant Gen8 rack servers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe HP 331FLR is a practical, value-conscious network adapter for organizations that need reliable 1 Gb connectivity at high port density inside supported HP ProLiant Gen8 servers. It stands out for low power use and predictable line-rate performance across four ports, making it a sensible buy when 1 Gb per port meets workload requirements and broader compatibility is not needed.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this adapter compatible with non-HP servers?\u003c\/strong\u003e\u003cbr\u003eThe 331FLR is designed for select HP ProLiant Gen8 rack servers and may not be supported or physically compatible with non-HP platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum aggregate throughput?\u003c\/strong\u003e\u003cbr\u003eThe card provides four 1 Gb ports for a total aggregate throughput up to 4 Gb under full line-rate conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it reduce power consumption?\u003c\/strong\u003e\u003cbr\u003eYes, the single-chip, quad-port design aims to lower power requirements compared with multiple discrete controllers for equivalent port counts.\u003c\/p\u003e","brand":"HP","offers":[{"title":"Default Title","offer_id":48235871600859,"sku":"B007LFVAWY","price":58.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71938xahFJL._AC_SL1200.jpg?v=1770820961","url":"https:\/\/gearmusthave.com\/products\/hp-331flr-network-adapter-629135-b21-quad-1gb-flex-lom","provider":"GearMustHave","version":"1.0","type":"link"}