{"product_id":"hpe-817749-b21-ethernet-2-port-640flr-sfp28-adapter-10-25gb","title":"HPE 817749-B21 Ethernet 2-Port 640FLR-SFP28 Adapter - 10\/25Gb","description":"\u003cp\u003eOur review of the HPE 817749-B21 Ethernet 2-Port 640FLR-SFP28 Adapter finds it best suited for IT professionals and small data center teams who need reliable 10\/25Gb connectivity in a half-height, low-profile server slot. The bottom line: this adapter delivers straightforward, no-frills 10\/25Gb dual SFP28 ports that integrate cleanly into HPE server environments, providing a compact upgrade path for systems that require higher throughput without changing server chassis or power architecture. It is a purpose-built network card that emphasizes compatibility and stable performance over consumer features.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 10\/25Gb SFP28 Ports:\u003c\/strong\u003e Provides two SFP28 ports for flexible 10Gb or 25Gb fiber connections, enabling higher uplink throughput for clustered servers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-profile 640FLR Form Factor:\u003c\/strong\u003e Designed as a 640FLR-SFP28 adapter to fit HPE half-height slots and preserve adjacent expansion options in dense rack deployments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eServer Integration:\u003c\/strong\u003e Built for HPE systems to ensure firmware and hardware compatibility for easier deployment and maintenance in existing HPE infrastructures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficient Bandwidth Upgrade:\u003c\/strong\u003e Lets administrators upgrade network speed without changing server power or major chassis modifications, reducing upgrade time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive Cooling Friendly:\u003c\/strong\u003e The FLR design minimizes added cooling needs and maintains predictable thermal behavior in populated server bays.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis adapter is aimed at system administrators and network engineers running HPE servers who need a compact, reliable way to add 10Gb or 25Gb fiber connectivity. It is particularly useful in blade or rack servers where space and airflow constraints make a low-profile form factor necessary.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing copper RJ45 connectivity, multi-function NICs with built-in storage offload, or consumer desktop upgrades; this adapter is focused on basic high-speed Ethernet ports rather than broad feature sets.\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\u003eCompact 640FLR-SFP28 design fits constrained server slots while providing high-speed links.\u003c\/li\u003e\n\u003cli\u003eDual-port 10\/25Gb capability delivers flexible uplink options for mixed-speed networks.\u003c\/li\u003e\n\u003cli\u003eHPE-oriented integration simplifies deployment in HPE server environments.\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 SFP28 fiber modules and lacks built-in copper or additional offload features, which may require transceivers or different adapters for some networks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eHPE 817749-B21 Ethernet 2-Port 640FLR-SFP28 Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHEWLETT PACKARD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePort Type\u003c\/td\u003e\n\u003ctd\u003eDual SFP28 (10Gb\/25Gb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003e640FLR-SFP28 low-profile adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended Use\u003c\/td\u003e\n\u003ctd\u003eServer network upgrade for HPE systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription\u003c\/td\u003e\n\u003ctd\u003eEthernet 10\/25Gb 2-port adapter for internal server installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe HPE 817749-B21 is a solid, specialist choice for administrators who need dependable 10\/25Gb SFP28 ports in a low-profile HPE-compatible package. It offers good value when the priority is straightforward bandwidth expansion and tight rack integration, though teams requiring copper ports or advanced offload features should consider other models.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this adapter support 10Gb as well as 25Gb?\u003c\/strong\u003e\u003cbr\u003eYes. The dual SFP28 ports support 10Gb and 25Gb operation depending on the transceiver and network configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit into standard HPE server slots?\u003c\/strong\u003e\u003cbr\u003eYes. The 640FLR-SFP28 form factor is designed specifically for HPE half-height expansion slots and compatible server architectures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre transceivers included?\u003c\/strong\u003e\u003cbr\u003eThe product description indicates SFP28 ports; transceivers or direct-attach cables are not specified and may need to be purchased separately based on network type.\u003c\/p\u003e","brand":"HEWLETT PACKARD","offers":[{"title":"Default Title","offer_id":48233637544155,"sku":"B01HR07BBQ","price":54.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71Y9YFZAX-L._AC_SL1500.jpg?v=1770738103","url":"https:\/\/gearmusthave.com\/products\/hpe-817749-b21-ethernet-2-port-640flr-sfp28-adapter-10-25gb","provider":"GearMustHave","version":"1.0","type":"link"}