Intel Xeon E3-1558L v5

The Intel Xeon E3-1558L v5 is a 4-core, 8-thread Skylake-H processor designed for the server and workstation segment, built on Intel's 14 nm process. It is a locked, end-of-life part with a launch MSRP of $396, and its benchmark data indicates it sits exactly at the 50th percentile of all CPUs, placing it in the middle of the performance pack. This processor offers a balanced profile for its intended embedded and mobile workstation use cases, but its data shows it is not a leader in any specific metric, making it a situational choice rather than a default recommendation.

Who Should Consider It

The E3-1558L v5 is a fit for professionals running single-threaded applications where a 3.30 GHz boost clock can be fully utilized. Its 4-core/8-thread configuration with a 45 W TDP makes it suitable for compact, thermally constrained systems that require ECC memory support for data integrity. The data shows its architecture is Skylake-H, which is a generation behind more recent parts, so users needing the latest instruction sets should look elsewhere.

For gaming, this processor is a moderate option. The 50th percentile standing suggests it will handle older or less demanding titles without issue, but the lack of any benchmark scores in the fact pack prevents a definitive verdict on modern AAA performance. Users building a dedicated gaming rig would likely find better value in more current desktop parts, but for a small-form-factor workstation that occasionally games, the Iris Pro Graphics P555 integrated GPU provides a fallback without a discrete card.

Creation workloads, such as video editing or 3D rendering, are a mixed bag. The 8 threads and 8 MB of shared L3 cache help with multithreaded tasks, but the 1.90 GHz base clock is low, meaning sustained all-core loads will run at a modest pace. The dual-channel memory bus with 34.1 GB/s bandwidth is adequate for 1080p editing but will bottleneck 4K or complex multi-layer projects. Office and productivity tasks are where this chip excels; the high boost clock for single-thread responsiveness and low power draw make it ideal for quiet, always-on workstations running spreadsheets, browsing, and coding.

Power and Thermals

The 45 W TDP classifies the E3-1558L v5 as a low-power part, a deliberate design choice for embedded and mobile server platforms. This TDP means a capable air cooler is sufficient; no exotic liquid cooling or large tower heatsinks are required. The 14 nm process node and 2,300 million transistors on a 171 mm² die contribute to this efficiency, allowing for passive cooling in some well-ventilated chassis.

Thermals are not a concern under typical loads, but the base clock of 1.90 GHz suggests the chip will downclock aggressively under sustained multithreaded workloads if cooling is inadequate. The data indicates a Skylake-H codename, which is a mobile-oriented design, so the thermal envelope is tuned for laptops and mini-PCs rather than desktop towers. Users should pair this with a motherboard that has robust VRM cooling, as the BGA 1440 socket is soldered, limiting aftermarket cooler options.

Single-Thread vs Multi-Thread Behavior

The split between a 1.90 GHz base clock and a 3.30 GHz boost clock is wide, indicating a design that prioritizes bursty single-thread performance over sustained all-core throughput. In single-threaded tasks, the boost clock of 3.30 GHz is competitive, placing it in a range where daily applications like word processors and web browsers will feel snappy. The data shows this is a 4-core part, so its single-thread score would be driven primarily by this boost clock and the Skylake architecture's IPC.

Multi-threaded behavior is less impressive. The 8 threads will help with parallel tasks, but the low base clock means that when all cores are active, the frequency will drop significantly, likely settling well below the 3.30 GHz boost. This results in a processor that is faster in short bursts (e.g., opening an application) than in long renders (e.g., exporting a video). The 8 MB shared L3 cache helps mitigate some of the latency penalties of multi-threaded access, but the overall multi-core performance is constrained by the thermal and power limits of the 45 W TDP.

How It Compares

The fact pack lists no nearest rivals for the E3-1558L v5, meaning there is no direct comparative data available in the provided information. This absence is notable; it suggests that the processor occupies a niche position with few direct competitors in the same form factor and power class. In the absence of rival scores, the analysis must rely on its absolute percentile of 50, which indicates it is neither a high-end performer nor a low-end outlier, but firmly in the middle of the distribution.

Without rival data, the comparison is qualitative. Against a hypothetical modern 4-core part, the E3-1558L v5 would likely lose on both single-thread (due to older architecture) and multi-thread (due to lower boost clocks) performance. However, its ECC memory support and 45 W TDP are features that many desktop rivals lack, making it a specialized choice for reliability-focused systems rather than a performance-seeking one.

FAQ

Q: What is the TDP of the Intel Xeon E3-1558L v5?

A: The TDP is 45 W, making it a low-power processor suitable for compact systems.

Q: Does the E3-1558L v5 support ECC memory?

A: Yes, it has ECC memory support, which is essential for error-correcting workloads in servers and workstations.

Q: What type of memory does it support?

A: It supports both DDR3 and DDR4 memory in a dual-channel configuration, with a memory bandwidth of 34.1 GB/s.

Q: What is the socket type?

A: It uses the Intel BGA 1440 socket, which is a soldered, non-upgradeable interface.

Q: What is the integrated graphics unit?

A: It features Iris Pro Graphics P555, providing a built-in display output without a discrete GPU.

Q: Is the multiplier unlocked for overclocking?

A: No, the multiplier is locked, meaning the clock speeds cannot be adjusted beyond factory settings.

Platform and Compatibility

The E3-1558L v5 is built for the Intel BGA 1440 socket, which is a ball-grid array package that is soldered directly to the motherboard. This means there is no upgrade path; once the processor is installed, it cannot be replaced with a different chip. The platform is based on the Skylake-H architecture, a mobile-oriented design, so motherboards for this chip are typically embedded or mini-ITX boards aimed at industrial PCs, network appliances, or small workstations.

Memory support spans both DDR3 and DDR4 in a dual-channel configuration, with a peak bandwidth of 34.1 GB/s. The memory controller supports ECC, which is a key differentiator from consumer desktop parts. PCIe support is Gen 3 with 16 lanes available from the CPU, which is sufficient for a single high-end GPU or multiple NVMe drives, but limits expansion compared to desktop platforms with more lanes. The production status is end-of-life, so new boards and chips are scarce, and users must rely on existing stock or used markets.

Benchmark Performance

The benchmark data for the E3-1558L v5 is sparse, with no average benchmark score and no performance percentile beyond a 50th percentile ranking. This 50th percentile is a critical indicator: it means that half of all CPUs tested perform better, and half perform worse, placing this chip in the dead center of the performance distribution. For a 2016 release, this is a reasonable standing, but it does not suggest any headroom for demanding modern workloads.

Without specific scores or rival deltas, the analysis must infer performance from the specifications. The 3.30 GHz boost clock is favorable for single-threaded workloads; in contrast, the 1.90 GHz base clock is low, which will hurt sustained multithreaded performance. The 8 MB L3 cache is generous for a 4-core part, aiding in cache-sensitive applications. The 14 nm process and 45 W TDP indicate efficiency over raw speed, and the data shows that in a direct comparison, this chip would likely lag behind newer 4-core parts with higher base clocks, but it would also consume less power and produce less heat, making it a trade-off between performance and efficiency.