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Intel Xeon W9-3575X specifications and in-depth review

Intel Xeon W9-3575X

Manufacturer: Intel

The Intel Xeon W9-3575X is a high-core-count enterprise processor designed for demanding workstation and server workloads. Running at a base speed of 2.2 GHz across 44 cores and 88 threads, it also supports an unlocked clock multiplier, giving users flexibility over performance tuning. With no integrated graphics, it is built strictly around computational throughput, making it a focused choice for professional compute environments.

On the memory side, the Xeon W9-3575X supports DDR5 RAM across eight channels, with a maximum bandwidth of 307.2 GB/s, a top RAM speed of 4800 MHz, and support for up to 4000 GB of ECC memory. Its 97.5 MB L3 cache helps sustain throughput across its many cores, while the instruction set roster includes AVX, AVX2, FMA3, AES, and SSE 4.1/4.2 extensions. The processor carries a thermal design power rating of 340W and a maximum operating temperature of 100°C, with PCIe 5 connectivity rounding out its platform capabilities. PassMark scores of 82,620 overall and 3,787 single-threaded reflect its orientation toward parallel, multi-threaded workloads.

Pros
  • 88 threads across 44 cores enables substantial parallel processing capacity for multi-threaded enterprise workloads
  • Support for up to 4000 GB of DDR5 ECC memory across eight channels suits memory-intensive server and workstation deployments
  • Maximum memory bandwidth of 307.2 GB/s supports data-heavy tasks that require sustained throughput
  • 97.5 MB of L3 cache helps reduce memory latency across all active cores
  • Unlocked clock multiplier provides flexibility for manual frequency tuning beyond default settings
  • PCIe 5 connectivity supports the latest generation of high-bandwidth expansion cards and storage devices
Cons
  • 340W TDP places significant demands on cooling infrastructure and power delivery within a system build
  • No integrated graphics means a discrete GPU is required even for basic display output
  • Single-threaded PassMark score of 3,787 reflects modest per-core performance for tasks that cannot leverage multiple threads
  • Base clock of 2.2 GHz is relatively low, with peak performance dependent on turbo boost conditions
Who is this for?

This processor is well-matched for professional environments that depend on sustained multi-threaded throughput, such as scientific computing, large-scale data processing, and virtualization workloads that can distribute tasks across many threads simultaneously. The support for up to 4000 GB of ECC DDR5 memory across eight channels makes it a strong fit for applications where both memory capacity and data integrity are critical, including in-memory databases and high-performance simulations. Organizations building dedicated workstation or server platforms around discrete GPU configurations will also find the absence of integrated graphics a non-issue, as these deployments typically rely on purpose-built accelerators anyway.

Who is this NOT for?

Users focused primarily on single-threaded application performance will find the processor's modest base clock of 2.2 GHz and single-threaded PassMark score of 3,787 limiting, as tasks that cannot distribute work across cores will not benefit meaningfully from its core count. The 340W TDP makes it unsuitable for thermally or spatially constrained environments, as it demands robust cooling solutions and significant power infrastructure that compact or standard desktop builds cannot accommodate. It is also a poor match for general-purpose desktop use, since the lack of integrated graphics requires an additional discrete component even for basic display functionality.

General info:

Thermal Design Power (TDP) 340W
semiconductor size 10 nm
PCI Express (PCIe) version 5
Supports 64-bit ✓
CPU temperature 100 °C
Has integrated graphics ✕

The Intel Xeon W9-3575X carries a Thermal Design Power (TDP) of 340W and a maximum CPU temperature of 100°C, reflecting the thermal demands of a high-core-count enterprise processor. It is built on a 10nm semiconductor process and fully supports 64-bit computing. Connectivity is handled through PCIe 5, the latest generation of the PCI Express standard, while the processor does not include integrated graphics, keeping it focused entirely on compute tasks.

Performance:

CPU speed 44 x 2.2 GHz
CPU threads 88 threads
turbo clock speed 4.8GHz
L3 cache 97.5 MB
clock multiplier 22
Has an unlocked multiplier ✓
L3 core 2.22 MB/core
Turbo Boost version 2

The processor runs 44 cores at a base clock of 2.2 GHz, delivering 88 threads in total, with the ability to boost up to 4.8 GHz through Turbo Boost version 2. It features a clock multiplier of 22 and, notably, an unlocked multiplier, which allows for manual frequency adjustments beyond default settings. The L3 cache totals 97.5 MB, distributed at 2.22 MB per core, providing a substantial pool of fast-access memory to help sustain throughput across all active threads.

Memory:

Supports ECC memory ✓
maximum memory bandwidth 307.2 GB/s
DDR memory version 5
RAM speed (max) 4800 MHz
maximum memory amount 4000GB
memory channels 8

The Xeon W9-3575X supports DDR5 memory across eight channels, enabling a maximum bandwidth of 307.2 GB/s at speeds of up to 4800 MHz. It accommodates up to 4000 GB of total memory, making it well-suited for workloads that require large in-memory datasets. ECC memory support is also included, providing hardware-level error detection and correction to help maintain data integrity during extended operation.

Features:

uses multithreading ✓
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Has NX bit ✓

The processor supports multithreading, allowing each physical core to handle multiple threads simultaneously for more efficient utilization under parallel workloads. It includes a broad set of instruction sets — MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2 — covering vectorized math, hardware-accelerated encryption, and floating-point operations. The NX bit is also present, enabling hardware-enforced memory protection that helps guard against certain classes of malicious code execution.

Benchmarks:

PassMark result 82620
PassMark result (single) 3787

In PassMark testing, the Xeon W9-3575X achieves an overall score of 82,620, reflecting strong multi-threaded throughput across its 44 cores. Its single-threaded PassMark result stands at 3,787, indicating the per-core performance available for tasks that do not scale across multiple threads.

Final Verdict

The Intel Xeon W9-3575X is a purpose-built enterprise processor that makes a clear case for itself in environments where massively parallel, memory-intensive workloads are the norm. Its 44-core, 88-thread configuration paired with DDR5 ECC memory support across eight channels and up to 4000 GB of addressable RAM positions it firmly within the domain of high-end workstations and server platforms. The thermal and power demands are substantial, and per-core clock speeds are not its strongest suit, so it is not a processor one would deploy without deliberate infrastructure planning. For organizations whose workloads can fully exploit its thread count and memory architecture, it represents a well-specified option within the enterprise CPU category.

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