Intel Xeon Phi 7235

The Intel Xeon Phi 7235 is a 64-core, 256-thread server/workstation processor built on the Knights Mill architecture and fabricated on Intel's 14 nm process with 8,000 million transistors. Released on 2017-11-30 for the Intel Socket 3647 platform, it runs at a 1300 MHz base clock and a 1400 MHz boost clock, with a 250 W TDP and support for ECC DDR4 memory. The database records no aggregate benchmark score for this part; its percentile ranking against all tracked CPUs stands at 50.

Benchmark Performance

The Xeon Phi 7235 occupies an unusual position in the benchmark database. Its percentile rank of 50 places it at the exact midpoint of all tracked CPUs: the part has no recorded benchmark scores and no nearest rivals listed. What the data does contain is a specification sheet that defines the performance envelope: 64 cores, 256 threads, a 1300 MHz base clock, and a 1400 MHz boost clock.

A 50th-percentile standing places the processor at the midpoint of the database's overall distribution. For a many-core server part, this aggregate position is heavily influenced by the low operating frequencies. The 1300 MHz base and 1400 MHz boost are far below typical desktop and mainstream server clocks, which suppresses the processor's standing in any benchmark that weights per-core speed. However, the raw thread count — 256 threads across 64 cores — is the defining feature. In throughput-oriented workloads that scale with concurrency, the Xeon Phi 7235's ranking would differ substantially from its aggregate percentile, because the aggregate percentile blends single-thread-sensitive and multi-thread-sensitive workloads.

The absence of benchmark scores means the 50th percentile is the only quantitative performance signal available. The processor's market segment is Server/Workstation, and its architecture is Knights Mill, a design explicitly intended for highly parallel numerical workloads. The data shows a processor that is neither a general-purpose mainstream part nor a high-clock enthusiast chip, but a specialized many-core device.

Single-Thread vs Multi-Thread Behavior

The single-thread and multi-thread behavior of the Xeon Phi 7235 is dictated by its clock and core configuration. The base clock is 1300 MHz and the boost clock is 1400 MHz. These figures are low by modern standards. A workload that depends on a single thread's execution speed — interactive response, lightly threaded legacy applications, latency-sensitive database queries — will see performance bounded by the 1300–1400 MHz range. The boost clock of 1400 MHz represents only a modest increase over the base, so there is little headroom for transient single-thread bursts.

Multi-thread behavior is a different story. The processor provides 256 threads across 64 cores, meaning each core is capable of running multiple hardware threads concurrently. This configuration keeps execution units busy with many independent instruction streams. In workloads that can saturate a large number of threads — dense matrix operations, simulation codes, batch analytics — the effective throughput is a product of the thread count and the per-thread efficiency at 1300–1400 MHz.

The cache hierarchy reinforces this split. Each core has 32 KB of L1 cache and 512 KB of L2 cache. The absence of a shared L3 cache in the recorded data means inter-core communication relies on the memory subsystem and the core-to-core fabric rather than a large shared cache. For workloads with high data locality per core, the 512 KB L2 is the primary working set buffer. For workloads with heavy shared-data access, the lack of a large shared cache could become a bottleneck. The data does not specify memory bandwidth, but the reliance on DDR4 with ECC support indicates a memory design aimed at reliability.

The practical implication is clear: the Xeon Phi 7235 is a throughput engine, not a latency engine. Any workload that cannot be parallelized across a large number of threads will underutilize the hardware, while workloads that scale to many threads will see the processor's strengths.

Who Should Consider It

Given the 64-core, 256-thread configuration and the 1300 MHz base / 1400 MHz boost clocks, the Xeon Phi 7235 is appropriate for workloads explicitly designed for massive parallelism. The server/workstation market segment and the Knights Mill architecture point toward scientific and technical computing, where dense floating-point and integer workloads can be decomposed into many independent tasks. Simulation, rendering, and batch data processing are natural fits, provided the software can use many threads effectively.

Gaming is not a suitable target. Games typically rely on a small number of high-clock cores, and the 1300–1400 MHz range of this processor would severely limit frame rates in any title that is not heavily multithreaded. Even modern games that scale to many threads would leave the vast majority of the 256 threads idle, and the low clock speed would dominate the performance profile.

Office and general productivity workloads also fall outside the ideal use case. Spreadsheet calculations, document processing, and web browsing are single-thread or lightly threaded in nature. The ECC DDR4 memory support, however, makes the platform attractive for environments where data integrity is paramount — financial modeling, scientific analysis, and long-running server processes that cannot tolerate memory errors. For a user whose primary workload is a single-threaded office application, this processor would be a poor choice. For a user running a compute workload that can use many threads on a single socket, it is precisely the kind of hardware the specification describes.

The 250 W TDP also implies a system design that assumes a dedicated compute node rather than a quiet desktop. Buyers should consider whether their software stack — operating system, scheduler, and application — can actually utilize the 256 threads.

How It Compares

The database lists no nearest rivals for the Xeon Phi 7235. Within the tracked CPU population, there is no directly comparable part that the database associates with this processor. The 50th-percentile ranking is the only comparative signal available, and it is an aggregate measure across all CPUs rather than a comparison against a specific competitor.

In the absence of rival data, the comparison must be drawn against the processor's own architectural context. The Xeon Phi 7235 belongs to the Knights Mill generation, built on a 14 nm process with 8