PEX89024 vs PEX89032 vs PEX89048 | Broadcom PCIe 5.0 Switch
Broadcom PEX89024 vs PEX89032 vs PEX89048: PCIe 5.0 Switch Comparison & Selection Guide
The Broadcom PEX89024, PEX89032 and PEX89048 are PCIe 5.0 ExpressFabric switches designed for server expansion, NVMe storage and high-performance computing systems. All three support 32 GT/s per lane, with different lane counts and power requirements.
This comparison helps engineers select the right PCIe Gen5 switch based on lane allocation, system topology and power budget.
For higher-density PCIe 5.0 designs, explore the Broadcom PEX89144 144-lane switch and the larger PEX89000 series.
PEX89024 vs PEX89032 vs PEX89048 Specifications
| Specification | PEX89024 | PEX89032 | PEX89048 |
|---|---|---|---|
| PCIe Generation | Gen 5.0 | Gen 5.0 | Gen 5.0 |
| Lane Count | 24 | 32 | 48 |
| Maximum Ports | 24 | 32 | 48 |
| Speed per Lane | 32 GT/s | 32 GT/s | 32 GT/s |
| Latency | 115 ns | 115 ns | 115 ns |
| Typical Power | 14 W | 17.2 W | 23.7 W |
| NT Ports | 4 | 4 | 4 |
| Package Size | 29 × 29 mm | 29 × 29 mm | 29 × 29 mm |
Source: Broadcom PEX89000 product specifications. Actual system performance depends on port configuration, topology and traffic patterns.
Which PCIe 5.0 Switch Should You Choose?
PEX89024 – For Compact PCIe Expansion
The PEX89024 offers 24 PCIe Gen5 lanes with 14W typical power consumption. It is suitable for smaller server expansion designs and NVMe storage configurations where the total lane requirement does not exceed 24.
PEX89032 – For Mid-Range PCIe Connectivity
The PEX89032 provides 32 PCIe Gen5 lanes with 17.2W typical power consumption. It offers additional connectivity for storage controllers, accelerators and systems requiring more flexible upstream and downstream lane allocation.
PEX89048 – For Higher-Density PCIe Expansion
The PEX89048 supports 48 PCIe Gen5 lanes with 23.7W typical power consumption. It is suitable for larger NVMe arrays, accelerator expansion and server designs requiring more PCIe connections.
PCIe Lane Allocation: A Practical Example
When selecting a PCIe switch, count both upstream and downstream lanes.
| Example Topology | Total Lanes | Suitable Model |
|---|---|---|
| 1 × x8 upstream + 4 × x4 NVMe | 24 | PEX89024 / PEX89032 / PEX89048 |
| 1 × x16 upstream + 4 × x4 NVMe | 32 | PEX89032 / PEX89048 |
| 1 × x16 upstream + 8 × x4 NVMe | 48 | PEX89048 |
Important: These examples illustrate lane budgeting, not guaranteed port configurations. Confirm supported port bifurcation, firmware and topology requirements using Broadcom's design documentation.
Key Selection Considerations
Lane count: Include upstream and downstream connections in the total lane budget.
Power consumption: Consider typical switch power and board-level thermal management.
System topology: Verify port-width configuration, multi-host requirements and PCIe routing.
Future expansion: Allow additional lanes when your storage or accelerator configuration may grow.
Can These Models Replace Each Other?
PEX89024, PEX89032 and PEX89048 belong to the same PCIe Gen5 family and share the same nominal package dimensions. However, identical package dimensions do not guarantee pin compatibility or direct replacement.
Before changing devices, verify pin assignments, PCB layout, power requirements, firmware configuration and the complete PCIe topology.
Related Broadcom Products & Guides
Broadcom PEX89024 / PEX89032 / PEX89048 Price & RFQ
Looking for Broadcom PEX89024, PEX89032 or PEX89048 PCIe 5.0 switches?
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Frequently Asked Questions
What is the main difference between PEX89024, PEX89032 and PEX89048?
The primary differences are lane count, maximum configurable ports and typical power consumption. All three support PCIe 5.0 at 32 GT/s per lane.
Which Broadcom PCIe switch is suitable for NVMe storage?
All three can be used in NVMe storage designs. Select the model based on the total upstream and downstream lane requirements, supported port topology and system power budget.
Can PEX89024 be upgraded directly to PEX89048?
Not necessarily. Although both have a nominal 29 × 29mm package size, pin compatibility, PCB layout, power delivery and firmware requirements must be verified before replacement.
