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Description
HPE® 817753-B21 alternative NVIDIA ConnectX-4 based NIC PCIe 3.0 x8 Dual Port 25GbE Open SFP28HPE 817753 B21 alternative NVIDIA ConnectX 4 NIC PCIe 3. 0 x8 Dual Port 25GbE SFP28 HPE 817753 B21 PCIe x8 NVIDIA Mellanox ConnectX 4 Dual Port 25G SFP28 adapter with 25Gb s Ethernet connectivity addresses virtualized infrastructure challenges for todays demanding markets and applications. Providing true hardware based I O isolation with unmatched scalability and efficiency, ConnectX 4 provides a cost effective and flexible Ethernet adapter solution
HPE® 817753-B21 alternative NVIDIA ConnectX-4 NIC PCIe 3.0 x8 Dual Port 25GbE SFP28
HPE® 817753-B21 PCIe x8 NVIDIA Mellanox ConnectX-4 Dual-Port 25G SFP28 adapter with 25Gb/s Ethernet connectivity addresses virtualized infrastructure challenges for today’s demanding markets and applications. Providing true hardware based I/O isolation with unmatched scalability and efficiency, ConnectX-4 provides a cost-effective and flexible Ethernet adapter solution for Web2.0, cloud, data analytics, database, and storage platforms. It provides a combination of 25G bandwidth, sub-microsecond latency and a 75 million packets per second message rate. It includes native hardware support for RDMA over Converged Ethernet (RoCE), Ethernet stateless offload engines, Overlay Networks, GPUDirect technology and Mellanox Multi-Host Technology.
System Requirements
- Windows, RHEL/CentOS, FreeBSD, VMware, OpenFabrics Enterprise Distribution (OFED), OpenFabrics Windows Distribution (WinOF)
- An available PCI Express x8/ x16 slot
Specification
- Compliant with PCI Express Specification Revision 3.0, 2.0 and 1.1
- 2.5, 5.0, or 8.0GT/s link rate x8
- Auto-negotiates to x8, x4, x2, or x1
- Support for MSI/MSI-X mechanisms
- Supports dual-Port 25G, 10G, or 1G SFP+
- IEEE802.3by, 25G supporting all FEC modes
- IEEE802.3az Energy Efficient Ethernet
- IEEE802.3ap based auto-negotiation and KR start-up
- Support Standards IEEE802.3ad, IEEE802.1ax, IEEE802.1Q, IEEE802.1P, IEEE802.1Qaz, IEEE802.1Qbb, IEEE802.1Qbg, IEEE1588V2
- Jumbo frame support 9.6KB
- Independent NC-SI SMBus interface
- Independent stand-by and wake-on-Lan signals
- Hardware based reliable transport
- Collective operation offloads
- PeerDirect RDMA (aka GPUDirect communication acceleration)
- 64/66 encoding
- Extended reliable connected transport
- Dynamically connected transport
- RDMA over Converged Ethernet (RoCE)
- TCP/UDP/IP stateless offload
- LSO.LRO. checksum offload
- Hardware offload of encapsulation and decapsulation of NVGRE and VXLAN overlay networks
- SR-IOV, Multi-function, Enhanced QoS, VMware support
- SR-IOV up to 256 virtual functions
- SR-IOV up to 8 physical functions per port
- Guaranteed QoS for VMs
- OpenMPI, IBM PE, OSU MPI, Intel MPI protocol support
- NC-SI over MCTP over SMBus and NC-SI over MCTP over PCIe-Baseboard Management Controller interface
- Remote boot over Ethernet, iSCSI, PXE, and UEFI
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 1027 reviews
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Product Reviews
★★★★★ 5
Very healing
I bought this for face but had also heard that this can be used for other skin issues. Yesterday, I cut my index finger with a label remover (basically a razor blade). Once I stopped the bleeding, I kept it clean and covered for a bit. Before bed, I decided to put a dab of this on my cut, when I woke up this morning, it's like a miracle! It barely hurts and looks quite healed!
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Reviewed in the United States on May 20, 2026
★★★★★ 5
It works... very well... for me. VERY WELL.
I typically detest American companies as many of the products contain both harmful and helpful ingredients at the same time. So far, Prequel has EXCEEDED my expectations.
PROS: It works for my skin. EWG gives good scores to Prequel also. Skin looks great afterwards. No scent. Lasts for hours with a healthy skin tone. You don't have to use a lot to cover an area (see below).
CONS: Slightly greasy when applied so it not a lightweight cream. Small tube (see below). Pricey.
You don't have to use a lot. I find that due to its slightly greasy nature, you can use much less to cover a greater area. Afterwards the greasiness disappears, leaving plump, healthy feeling skin texture.
As with any skincare product, your skin may react differently. I have tried major Western brands which worsened my skin (Cereva for instance) before switching to Korean & Japanese products (far superior). Prequel is now the only Western brand I will use on a regular basis, to include their bar of soap (superior to my regular Korean brand).
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Reviewed in the United States on September 14, 2025
★★★★★ 5
Great dry spot treatment!
Worked wonders on winter dry patches on my cheeks and sides of mouth. I’m a somewhat new Prequel product user. I follow the creator on YouTube and love her skincare videos. I have tried a few products so far and have been happy with the results. I just ordered the foot repair ointment for my husband as well. I think this brand is a great value for the money. I have not had any bad reactions so far and I have VERY sensitive skin. This ointment is lightweight and melts into my skin well and the next morning my dry spots were literally invisible. It’s fragrance free, I did not notice any scent at all, which is importance to me.
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Reviewed in the United States on January 3, 2026
★★★★★ 4
Prequel is always great
Very soothing and calming for skin. Tube lasted a long time. I have sensitive skin and often have reactions but did great with this.
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Reviewed in the United States on March 14, 2026
★★★★★ 5
This is a barrier cream?
I also have very oily skin, so normally I stay away from anything that says barrier or balm. I push skin a lot lol...with max strength tretinoin, glycolic acids, salicylic acids, vitamin C... so there are times when I just need max help from a richer product bc sometimes I take it too far. LRP Cicaplast has been a staple and has saved me many a times.
I bought this bc of the high percentage of ectoin, 5%, and it was so reasonably priced. When I squeezed the tube, I was really worried, it was thicker looking than the Cicaplast. However, when I spread it out, it was SO light and a tiny amount --barely a pea size, was enough to coat my face. It did not feel heavy. Even with my oily skin, I think I could wear this everyday.
As an experiment, I applied any excess on one side of my hand, as I'm right handed, I would apply it on my left hand. I've had this about a week, and right now after doing the dishes, and washing my hands multiple times without any hand cream on it, my right hand is definitely drier than my left hand. My left hand also looks less red and more calm.
This formula is 5 stars for both the effectiveness and the elegant formula. It may yet replace my LRP Cicaplast...we'll see!
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Reviewed in the United States on November 6, 2025