Specifications
Part Number
PEX90144 (Broadcom ExpressFabric)
Lanes
144 lanes of PCIe Gen6
Process
5 nm CMOS
Interface Generation
PCIe Gen6 (64 GT/s per lane) / CXL
SerDes
In-house Broadcom SerDes with greater than 36 dB channel budget
Multi-Host
Multi-host support implemented in hardware
Fabric Management
Turnkey software for fabric management
Diagnostics
Embedded PCIe analyzer
Ecosystem
Part of the Broadcom end-to-end PCIe Gen6 connectivity portfolio
Portfolio Siblings
PEX90032, PEX90064, PEX90080, PEX90104 Gen6 switches
Retimer Companions
BCM85667 (16-lane) and BCM85668 (8-lane) Gen6 retimers
Bandwidth Comparison
PCIe Gen6 is 2x Gen5 and 4x Gen4 per lane
CXL Support
CXL 3.x support for pooled memory and multi-level switching
Target Deployments
AI rack backplanes, GPU-to-storage fan-out, multi-host switch fabrics
Overview
The Broadcom PEX90144 is a 144-lane PCIe Gen6 switch built on a 5nm process, part of Broadcom's ExpressFabric PCIe switching family. It sits above the PEX90104 in lane count and is the widest device in the published Gen6 switch line-up.
Gen6 doubles per-lane bandwidth relative to Gen5 — 64 GT/s against 32 GT/s — which means a switch's lane budget buys twice the aggregate throughput it did a generation ago. Broadcom's in-house SerDes, quoted at better than 36 dB of channel loss budget, is what makes 144 lanes practical across a large backplane without burning power on external retimers in every trace.
Two capabilities are worth calling out for AI infrastructure. Multi-host support is implemented in hardware rather than firmware, so a single switch can present itself to several host systems without a software layer in the data path. And CXL generations ride on the same Gen6 physical layer, which is why the same fabric can be used for pooled memory as well as SSD and accelerator fan-out.
Key Benefits
144 lanes of PCIe Gen6 — widest switch in the published Gen6 family. Hardware multi-host — no software layer in the data path. Embedded PCIe analyzer — link diagnostics without external instrumentation.
Applications
AI rack backplanes, GPU-to-storage fabric fan-out, multi-host PCIe switch fabrics, CXL pooled-memory systems, and next-generation AI cluster interconnect designs where storage and accelerators share one connectivity tree.
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