Intel Xeon D-1548

Intel Xeon D-1548 is an 8-core, 16-thread Broadwell-DE processor from Intel, built on a 14 nm process and launched on October 31, 2015. With a base clock of 2.00 GHz and a boost clock of 2.60 GHz, this server/workstation chip targets dense, power-conscious deployments. Its 45 W TDP class places it firmly in the low-power segment, while its benchmark data reveals a nuanced performance profile that sits near the median of all CPUs tracked.

Benchmark Performance

The benchmark results for the Intel Xeon D-1548 show a processor that is competent but not class-leading, with an average benchmark score of 2231 across all tested workloads. This places it at the 49th percentile of all CPUs, meaning it outperforms roughly half of the processors in the database while trailing the other half. In Cinebench R15, the chip scores 777 points in multi-threaded rendering and 109 points in single-threaded rendering. Moving to Cinebench R20, those numbers become 3239 and 457, respectively, and in the more demanding Cinebench R23 test, it achieves 7713 multi-core and 1089 single-core.

The deltaPct values against its nearest rivals tell a story of razor-thin margins. The Intel Core i7-5775C posts an identical average score of 2231, resulting in a 0% delta, these two processors are effectively tied in overall benchmark performance. The Intel Core i7-8559U scores 2229, which is just 0.1% behind the Xeon D-1548, a difference well within run-to-run variance. The Intel Xeon E-2226GE is 0.1% ahead with a score of 2234, while the Intel Xeon E5-4648 v3 trails by a mere 0.2% at 2227. These figures indicate that in aggregate, the D-1548 sits at a performance equilibrium point where several very different chips, ranging from mobile-class parts to older server silicon, converge.

What the data does not show is any dramatic strength in a particular benchmark category. The single-core scores are modest for a modern processor, reflecting the relatively low 2.60 GHz boost clock, but the multi-core results demonstrate that the 8-core/16-thread configuration provides solid scaling. The gap between the R15 and R23 multi-core scores (777 vs 7713) is consistent with the increased workload demands of newer Cinebench versions, not an anomaly in the chip's behavior.

Power and Thermals

The TDP of this processor is 45 W, a figure that places it in the low-power tier for server-class silicon. This is not a chip that requires exotic cooling solutions; a capable air cooler designed for low-power Xeon or embedded processors would be more than sufficient. The 45 W TDP implies that sustained all-core workloads will generate manageable heat, and system integrators can design compact chassis without aggressive airflow requirements.

This power envelope is a defining characteristic of the Xeon D-1548. For comparison, the nearest rivals span a wide thermal range, the Core i7-8559U is a mobile part with a similar low-power design, while the Xeon E-2226GE and E5-4648 v3 occupy different power classes entirely. The 45 W figure allows the D-1548 to be deployed in fanless or semi-passive systems, edge gateways, and network appliances where thermal headroom is at a premium. The trade-off is that the boost clock is limited to 2.60 GHz, which constrains peak single-thread performance in thermally sensitive scenarios.

Who Should Consider It

The workload data suggests that the Xeon D-1548 is best suited for environments where multi-threaded throughput per watt is more important than raw single-thread speed. Server and workstation users running parallel workloads, such as virtualization hosts, container orchestration nodes, or database servers with multiple concurrent queries, will find the 8 cores and 16 threads beneficial. The Cinebench multi-core scores, which show strong scaling from R15 through R23, indicate that the chip can sustain high utilization across all cores without hitting a thermal ceiling.

For gaming, this processor is not an ideal choice. The single-core Cinebench R23 score of 1089 is modest, and many gaming titles are sensitive to single-thread performance. The low boost clock would likely become a bottleneck in CPU-bound scenarios, and the lack of integrated graphics means a discrete GPU is mandatory. For content creation, the story is mixed: video encoding and 3D rendering tasks that leverage all cores will perform adequately, as demonstrated by the multi-core numbers, but interactive tasks like photo editing or timeline scrubbing that rely on single-thread speed may feel sluggish.

Office productivity and general business applications fall squarely within the D-1548's comfort zone. Spreadsheets, document processing, and web-based workloads rarely push a single core to its limit, and the 16 threads provide ample headroom for multitasking across many applications. The low TDP also makes it attractive for always-on office servers or small business NAS systems that run 24/7.

FAQ

Q: What is the launch MSRP of the Intel Xeon D-1548?

A: The launch MSRP is $555.

Q: How does the Xeon D-1548 compare to the Intel Core i7-8559U in benchmark scores?

A: The Xeon D-1548 has an average benchmark score of 2231, which is 0.1% higher than the Core i7-8559U's score of 2229.

Q: Does this processor support ECC memory?

A: Yes, the Xeon D-1548 supports ECC memory, with dual-channel DDR3 and DDR4 memory support.

Q: What is the TDP of the Xeon D-1548, and what does it imply for cooling?

A: The TDP is 45 W, which implies that a low-power air cooler designed for embedded or server processors is sufficient; no exotic cooling is required.

Q: How many PCIe lanes does the processor provide?

A: The Xeon D-1548 provides 24 PCIe Gen 3 lanes from the CPU alone.

Q: Is the multiplier unlocked for overclocking?

A: No, the multiplier is locked, and the processor is not designed for overclocking.

Platform and Compatibility

The Xeon D-1548 uses the Intel BGA 1667 socket, which is a soldered, non-upgradeable platform typically found in embedded and compact server boards. This means the processor is not user-replaceable; it comes attached to the motherboard, and any future upgrade would require replacing the entire board. The architecture is Broadwell, specifically the Broadwell-DE generation for Xeon D, built on Intel's 14 nm process with 3,200 million transistors on a 246 mm² die.

Memory support includes both DDR3 and DDR4, running in dual-channel mode, with ECC memory supported, a critical feature for error-sensitive server workloads. The PCIe implementation is Gen 3 with 24 lanes available from the CPU, which is sufficient for a single high-bandwidth GPU, multiple NVMe drives, or a combination of network and storage controllers. The production status is listed as Active, meaning the chip is still in production and available for new designs, though the 2015 release date indicates it is a mature platform. The part number is SR2DJ, and the memory bus being dual-channel is a limiting factor for memory bandwidth compared to quad-channel server platforms, but it aligns with the low-power positioning.

Single-Thread vs Multi-Thread Behavior

The performance split between single-threaded and multi-threaded workloads is stark for the Xeon D-1548. In Cinebench R23, the single-core score is 1089, while the multi-core score is 7713, yielding a scaling ratio of approximately 7.1x from one core to sixteen threads. This is close to ideal for an 8-core chip with Hyper-Threading, indicating that the processor scales efficiently when all cores are active. The boost clock of 2.60 GHz applies to single-core operation, but the modest frequency cap means that even lightly threaded tasks will not see dramatic speed bursts.

For real-world applications, this behavior means that the D-1548 excels in batch-oriented workloads, rendering, compiling, data processing, where all threads can be kept busy. Conversely, latency-sensitive applications that depend on a single fast core, such as interactive shells, certain database queries, or legacy single-threaded software, will perform at a level consistent with a mid-range processor from the mid-2010s. The Cinebench R15 single-core score of 109 and R20 score of 457 reinforce this: the chip is multi-thread-capable but not single-thread-competitive with modern desktop parts that often exceed 2000 in R23 single-core.

How It Compares

Intel Core i7-5775C: This rival matches the Xeon D-1548 exactly with an average score of 2231, a 0% delta. The i7-5775C is a desktop part from the same Broadwell generation, but it features a higher clock speed and integrated graphics. The data shows they are performance twins in aggregate benchmarks, which is notable given their different market segments, one is a low-power server chip, the other a consumer desktop CPU.

Intel Core i7-8559U: With a delta of 0.1%, the i7-8559U is effectively tied with the Xeon D-1548. This mobile processor, typically found in premium laptops, achieves nearly identical average benchmark scores despite having fewer cores, likely due to higher boost clocks. The comparison highlights that the D-1548's multi-core advantage is offset by its lower single-thread speed.

Intel Xeon E-2226GE: The E-2226GE is 0.1% ahead with a score of 2234. This rival is also a low-power server chip, but with six cores rather than eight. The similar average score suggests that the E-2226GE's higher clock speeds compensate for its two fewer cores, making it a direct competitor in the power-constrained server segment.

Intel Xeon E5-4648 v3: Trailing by 0.2% with a score of 2227, this older, higher-power Xeon part is essentially performance-equivalent to the D-1548 in the aggregate data. The E5-4648 v3 has a different architecture and TDP class, yet the benchmark results converge, demonstrating that the D-1548's efficiency-focused design does not sacrifice overall throughput relative to more power-hungry alternatives.