Aries 7 PCIe Smart RetimerAries 7 PCIe Smart Retimer

Aries PCIe® Smart Retimers

The Industry’s First PCIe 7 Retimer

Download Portfolio Brief

The Gold Standard for PCIe Connectivity

  • Industry’s first PCIe 7 retimer supporting 128 GT/s data rates
  • Purpose-built to solve PCIe/CXL® signal integrity challenges for AI
  • Extends end-to-end channel reach by 40+ dB for complex topologies
  • Advanced telemetry with COSMOS link intelligence software suite
  • Validated across leading CPUs and GPUs through our Cloud-Scale Interop Lab

Nothing Out of Reach

Close the Toughest Channels

Extending Industry-Leading Signal Conditioning to PCIe 7

Robust Signal
Integrity

128 GT/s PAM4 SerDes and DSP customized for demanding AI server channels

Pin-Compatible Footprint

Smart Swap between retimer and redriver without board redesign

Enhanced Diagnostics
& Telemetry

Cosmos Platform Logo – Astera Labs Developer Ecosystem for CXL Products

Extended capabilities through
in-band and out-of-band fleet management

Why Choose the Aries Smart Retimer?

Purpose-Built on Years of Learnings From Cloud-Scale Deployments

Robustness

  • Enhanced Signal Integrity 

    Reliable PCIe and CXL signal integrity with maximum reach extension

  • Advanced Error Correction

    FEC monitoring and FLIT-level error correction help maintain reliable PCIe operation across channels

  • Rigorous Interoperability

    Validated for multiple PCIe generations across 200+ root complexes and endpoints

Ease of Use

  • Pin Compatibility

    Same footprint as Aries 7 Smart Redrivers enables designers to Smart Swap to retimers on the same board as channel requirements evolve

  • Broad Platform Support

    PCIe and CXL protocol support across board and cable form factors enable diverse AI and cloud architectures

  • SW-Defined Architecture

    COSMOS software suite enables flexible protocol and state transition control across open PCIe ecosystems

Link Intelligence

  • Rapid Debug

    Built-in protocol analysis, link history, RX lane eye scans, and self-tests accelerate fault isolation

  • Proactive Diagnostics

    Firmware-based link health monitoring helps alert the BMC to emerging performance issues

  • Lifecycle Upgrades

    COSMOS software updates enable new features and capabilities across deployed infrastructure

Use Cases

AI Server Head Node

Deliver high-performance, robust PCIe link connectivity with optimized thermal efficiency for CPU root complex server boards that connect to GPU baseboards…

Modular Infrastructure

Accelerate general purpose server deployments with high performance, robust PCIe connectivity solutions in modular infrastructure based on industry standard…

Resources

Evaluation Kits

Evaluation KitImageDocumentsDescriptionMax PCIe GenPCIe LanesPack QuantityOrderingProduction Status
EQUINOX7-REVAEquinox7Add-InCard-675x550Product BriefAries 7 Smart Retimer CEM Add-In-CardPCIe 7.xx161Contact UsPre-Production
Equinox 6 PCIe® 6.x Riser Cardequinox-6-675x550Product BriefAries 6 Smart Retimer CEM-CEM Add-in-CardPCIe 6.xx161Contact UsPre-Production
Solstice 6 PCIe 6.x Riser CardSolstice 6 PCIe 6.0 Riser Card – Astera Labs Connectivity Product PhotoProduct BriefAries 6 Smart Retimer CEM-MCIO Add-in-CardPCIe 6.xx161Contact UsPre-Production
Equinox 5 PCIe® 5.0 Riser CardAries Equinox PCIe 5.0 Add-In CardProduct BriefAries 5 Smart Retimer CEM-CEM Add-in-CardPCIe 5.0x161Contact UsProduction
COMET-REVAComet Board ImageProduct BriefAstera Labs USB-to-I2C Communication Module––1Contact UsProduction

Ordering Information

Part NumberRetimer GenPCIe/CXLLanesCompatibility
PT716*4thPCIe 7.0/CXL 3.0 16Seamless hardware and software upgradability utilizing industry standard footprints and COSMOS
PT708*4thPCIe 7.0/CXL 3.08Seamless hardware and software upgradability utilizing industry standard footprints and COSMOS
PT608* 3rdPCIe 6.x/CXL 3.x 8Seamless hardware and software upgradability utilizing industry standard footprints and COSMOS
PT616*3rd CIe 6.x/CXL 3.x16Seamless hardware and software upgradability utilizing industry standard footprints and COSMOS
PT508*2ndPCIe 5.0/CXL 2.08Seamless hardware and software upgradability utilizing industry standard footprints and COSMOS
PT516*2nd PCIe 5.0/CXL 2.016Seamless hardware and software upgradability utilizing industry standard footprints and COSMOS
PT408*1st PCIe 4.08Seamless hardware and software upgradability utilizing industry standard footprints and COSMOS
PT416*1stPCIe 4.016Seamless hardware and software upgradability utilizing industry standard footprints and COSMOS

Nothing Out of Reach: The Aries PCIe 7 Family Delivers Copper and Optical Signal Conditioning for AI’s Next Chapter

The Industry’s First and Broadest PCIe® 7 Portfolio Powers AI Within and Beyond the RackAt a Glance:PCIe 7 unlocks the massive bandwidth AI needs while pushing signal integrity to its limitFor links beyond the rack, we introduce our first optical connectivity productsWithin the rack, Aries Smart Retimers and Redrivers help extend challenging copper linksOn October… Read more

Four Walls Constrain AI Today. We’re Breaking Them All.

Just 16 months ago, I wrote about AI outgrowing the server. While this thesis holds, the workloads have changed: The challenges then were defined by the size of training clusters, but AI now has entered the inference era in earnest.The hottest topic among data center operators is no longer the “AI model” but the “AI factory” – and the winning approach must deliver not just peak… Read more

AI Infra Summit 2026: When You Can’t Buy More Memory, You Get More Out of What You Have

Squeezing More Out of Every ByteGoogle Fellow Dave Patterson had the line of AI Infra Summit 2026: We’re entering a “memory-centric era.” The pricing backs him up. Analyst Jim Handy of Objective Analysis tells us that DRAM average price increased 250% from 2Q25 to 2Q26. Businesses are slowing down because they simply cannot get enough of it.But everyone walked into the summit… Read more

Astera Labs Announces Aries 7: Industry’s First PCIe 7 Signal Conditioning Portfolio Across Copper and Optical Interconnects 

Purpose-built retimers, redrivers, cable modules, optical drivers, and optical transimpedance amplifiers (TIAs) to support diverse PCIe 7 connectivity in AI systemsNews highlights:Most comprehensive PCIe signal conditioning portfolio: Building on Aries’ field-tested deployments, Aries Smart Signal Conditioning family is now the industry’s first PCIe 7 portfolio to span copper… Read more

Astera Labs Bolsters Leo Smart Memory Controller Family for Agentic AI and General-Purpose Cloud Workloads

As high-value AI applications drive explosive memory-footprint growth amid tight supply, new connectivity architectures enhance optimal memory utilization and reuseHighlightsNew Leo X-Series optimizes token economics: Paired with Astera Labs’ Scorpio X-Series Fabric Switches, Leo X-Series enables fabric-attached memory for long-context, KV-cache-intensive workloads. Platform-specific… Read more

Astera Labs Reports Second Quarter 2026 Financial Results

Record quarterly revenue of $392.4 million, up 27% QoQ and up 104% year-over-yearQ2 revenue strength reflects diversified growth across AI fabrics and signal conditioningQ3 revenue inflection to be driven by Scorpio™ X-Series 320-lane fabric switch production ramp SAN JOSE, CA, U.S. – August 4, 2026 – Astera Labs, Inc. (Nasdaq: ALAB), a leader in semiconductor-based connectivity… Read more

Astera Labs Expands Taurus Family with Industry’s First OCP-Standard Footprint Compatible 3.2T Smart Retimers and Smart Redrivers

Unified COSMOS stack helps customers accelerate time to market with real-time link observability and advanced diagnostic featuresNews Highlights:Expanded Taurus family adds 3.2T Ethernet Smart Retimers and Smart Redrivers for scale-up and scale-out AI infrastructure.Sampling industry-first Smart Retimers and Smart Redrivers built on the OCP Signal Conditioner Standard Footprint…. Read more

Demo: Aries PCIe 7 Smart Redriver

Watch Product Applications Engineer Raghu Parthasarathy demonstrate the industry’s first PCIe® 7 Smart Redriver, a new addition to the Aries family. As PCIe data rates double with each generation, system designers must maintain signal integrity across long board traces, connectors and lossy channels while also balancing power and latency trade offs.The Aries PCIe Smart Redriver is… Read more

First Look: Aries PCIe 7 Smart Signal Conditioning Family

As AI infrastructure scales, hyperscalers are moving quickly toward PCIe® 7 to unlock higher bandwidth. At the same time, they need robust links, faster time to market, and flexible connectivity solutions as architectures evolve.Watch Principal Product Manager Connie Lu provide the first look at Aries 7, the industry’s first and broadest PCIe 7 signal conditioning portfolio comprising… Read more

First Look: Expanded Leo Smart Memory Controller™ Family

See the new X-Series for fabric-attached KV cache offload and the Leo 2 E-Series and P-Series for CXL 3.2 expansion, pooling, and sharing. Read more