ATTO Celerity™ Fibre Channel host bus adapters deliver the fastest data throughput available for today's most demanding storage environments.

Trusted by Fortune 1000 companies to deliver their data, we focus on delivering the lowest latency solutions for today’s modern workflows, including: physical and virtual datacenters, unstructured data environments, streaming and backup services, disaster recovery, Mac Pro® infrastructures, rich content delivery, and server clustering.


Engineered to give you the edge

Celerity HBAs are engineered differently and have an advantage over the leading competitor embedded directly in the processor's architecture. Every element of the design is selected for quality and speed. We start with a multi-core Fibre Channel ASIC supporting multiple dynamic data threads to provide incredible performance in keeping data flow at optimum levels.  Adding our intelligent software driver stack further enhances our Celerity Fibre Channel HBAs by tuning to best optimize the data flow for your data patterns.  It is no wonder that our HBAs are half the latency of our closest competitor and users continuously turn to ATTO to get the most out of their Fibre Channel infrastructure.

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Architect the modern datacenter

Storage architects who demand extreme and reliable performance consistently turn to ATTO. Celerity HBAs unleash the performance of all-flash data centers with the support of NVMe fabric technology for demanding workloads that require extreme performance, ultra-low latency, and storage persistency to shared storage resources.

Custom connectivity

Available in low-profile single-, dual-, and quad-port versions, ATTO Celerity HBAs are backward compatible, reducing the complexity of deploying and managing the SAN, and take full advantage of advancements for reliability and forward error correction to improve network performance and resiliency. ATTO HBAs support a wide breadth of operating systems for the most flexibility including Windows®, Linux®, illumos, FreeBSD, VMware and macOS®.


Connect your workstation to enterprise storage

ATTO Celerity HBAs, featuring Multipath Director™ technology, are the only solution that allows direct connectivity to enterprise storage not just for servers, but also workstations. They provide load balancing and path failover protection to improve overall Fibre Channel SAN efficiency with consistent uninterrupted access to your data.



Reliable performance is our specialty

Move large volumes of data with fast, predicable and deterministic response time by optimizing performance up to 6400MB/s per channel and support for PCIe 4.0. Built into every Celerity HBA, ATTO Advanced Data Streaming (ADS™) technology manages latency by providing controlled acceleration for smooth data streaming and allows you to maintain the highest consistent performance in data intensive environments.

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ADS Competitor lacks quality performance.
ADS has premium levels of consistent performance.

Industry's broadest interoperability

From operating systems and servers to switches and storage, ATTO works closely with tier one industry leaders to ensure certified interoperability for robust storage area network (SAN) infrastructure deployments with proven best practices.

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Apple Solutions


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NetApp Solutions


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Quantum Solutions


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Dell Solutions


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HPE Solutions


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VMware Solutions


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Celerity™ FC - 64Gb/s Gen 7 Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-641E
Data Rate:64Gb/s
Transfer Rate:6400MB/s
Ports:1
Bus Type:x8 PCIe 4.0
Included Optics1 SFP+
Celerity FC-642E
Data Rate:64Gb/s
Transfer Rate:12.8 GB/s
Ports:2
Bus Type:x8 PCIe 4.0
Included Optics2 SFP+

Celerity™ FC - 32Gb/s Gen 7 Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-321P
Data Rate:32Gb/s
Transfer Rate:3200MB/s
Ports:1
Bus Type:x8 PCIe 4.0
Included Optics1 SFP+
Celerity FC-322P
Data Rate:32Gb/s
Transfer Rate:6400MB/s
Ports:2
Bus Type:x8 PCIe 4.0
Included Optics2 SFP+
Celerity FC-324P
Data Rate:32Gb/s
Transfer Rate:12.8GB/s
Ports:4
Bus Type:x16 PCIe 3.0
Included Optics4 SFP+

Celerity™ FC - 32Gb/s Gen 6 Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-321E
Data Rate:32Gb/s
Transfer Rate:3200MB/s
Ports:1
Bus Type:x8 PCIe 3.0
Included Optics1 SFP+
Celerity FC-322E
Data Rate:32Gb/s
Transfer Rate:6400MB/s
Ports:2
Bus Type:x8 PCIe 3.0
Included Optics2 SFP+
Celerity FC-324E
Data Rate:32Gb/s
Transfer Rate:12.8GB/s
Ports:4
Bus Type:x16 PCIe 3.0
Included Optics4 SFP+

Celerity™ FC - 16Gb/s Gen 6 Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-161P
Data Rate:16Gb/s
Transfer Rate:1600MB/s
Ports:1
Bus Type:x8 PCIe 3.0
Included Optics1 SFP+
Celerity FC-162P
Data Rate:16Gb/s
Transfer Rate:3200MB/s
Ports:2
Bus Type:x8 PCIe 3.0
Included Optics2 SFP+
Celerity FC-164P
Data Rate:16Gb/s
Transfer Rate:6400MB/s
Ports:4
Bus Type:x8 PCIe 3.0
Included Optics4 SFF

Celerity™ FC - 8Gb/s Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-81EN
Data Rate:8Gb/s
Transfer Rate:800MB/s
Ports:1
Bus Type:x8 PCIe 2.0
Included Optics1 SFP+
Celerity FC-82EN
Data Rate:8Gb/s
Transfer Rate:1600MB/s
Ports:2
Bus Type:x8 PCIe 2.0
Included Optics2 SFP+
Celerity FC-84EN
Data Rate:8Gb/s
Transfer Rate:3200MB/s
Ports:4
Bus Type:x8 PCIe 2.0
Included Optics4 SFP+

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