Intel Xeon E5502

The Intel Xeon E5502 is a dual-core server processor from the Nehalem generation, targeting the entry-level workstation and server market. With a modest 1.87 GHz base clock and no boost capability, this chip is positioned for basic throughput rather than high-frequency responsiveness. The data indicates a processor that, while lacking in raw speed, offers a specific balance of platform features and power characteristics for its intended segment.

Benchmark Performance

The benchmark results for the Intel Xeon E5502 place it at the 50th percentile among all CPUs tracked in the database, indicating a perfectly median standing within the broader processor landscape. However, the absence of a dedicated benchmark score and a lack of comparable rival data means that the quantitative assessment relies entirely on architectural and frequency-based projections. The 1.87 GHz base clock, combined with a 45 nm process node and 731 million transistors, suggests a processor that will deliver modest integer and floating-point performance, typical of a dual-core part from its era.

Given the 50th percentile ranking, the E5502 sits exactly at the midpoint of the performance distribution, meaning it outperforms roughly half of all recorded CPUs while trailing the other half. This is a logical position for a dual-core, dual-thread part with a relatively low clock speed, as modern multi-core processors with higher frequencies will inevitably dominate the upper percentiles. The data shows no boost clock, meaning the processor operates at a fixed frequency under all loads, which simplifies thermal management but limits peak performance in bursty workloads. In multi-threaded applications, the 2-core/2-thread configuration will be a bottleneck, as the processor cannot leverage simultaneous multithreading to extract additional instruction-level parallelism.

The lack of any nearestRivals data in the fact pack prevents direct percentage comparisons, but the architectural parameters allow for an inferred assessment. The 4 MB shared L3 cache is substantial for a dual-core part, providing a larger working set for active data compared to older architectures. This cache capacity helps mitigate the low clock speed in scenarios where data reuse is high, such as database lookups or virtualized workloads with moderate concurrency. The 64 KB L1 and 256 KB L2 per core are standard for the Nehalem architecture, ensuring that core-to-cache latency remains within expected bounds.

Power and Thermals

The E5502 is rated with a thermal design power (TDP) of 80 watts, a figure that places it in the mid-range for server processors of its generation. For a dual-core chip, this TDP is relatively high, indicating that the Nehalem architecture’s uncore components—including the integrated memory controller and shared L3 cache—consume a significant portion of the power budget. The 45 nm process node, while advanced for its time, does not offer the efficiency of later lithographies, and the 80 W envelope reflects the trade-off between transistor density and power leakage.

This TDP class implies a need for a capable air cooler, but not an exotic liquid-cooling solution. In a server chassis, a standard 1U or 2U heatsink with a ducted fan will suffice, as the 80 W load is well within the thermal capacity of typical server cooling designs. The processor’s fixed 1.87 GHz clock, without boost states, means that power draw remains relatively constant under sustained load, avoiding the thermal spikes associated with frequency ramping. For system integrators, this predictability simplifies power supply sizing and thermal validation, as the worst-case power consumption is tightly bounded by the TDP figure.

The absence of an integrated graphics processor offloads thermal headroom to the compute cores and uncore logic, but the overall heat density is manageable given the 263 mm² die size. The 80 W TDP also suggests that the E5502 can operate in passive-cooled configurations within well-ventilated server enclosures, provided there is adequate chassis airflow. For workstation deployments, a low-profile active cooler will keep temperatures within specification, even under continuous multi-threaded loads.

Platform and Compatibility

The Intel Xeon E5502 is built for the Intel Socket 1366 platform, a socket that supports the Nehalem architecture’s triple-channel memory interface. The processor natively supports DDR3 memory in a triple-channel configuration, which provides a wide memory bus for feeding the dual-core compute engines. This memory arrangement is a key advantage over older dual-channel platforms, as it increases available bandwidth for memory-intensive server workloads such as virtualization and database caching. Error-correcting code (ECC) memory is supported, a critical feature for server reliability, allowing the processor to detect and correct single-bit memory errors without system downtime.

The platform integrates a PCIe Gen 2 controller, offering the second-generation PCI Express specification’s higher bandwidth per lane compared to Gen 1. This enables the use of modern expansion cards, including network adapters and storage controllers, without bottlenecking peripheral data transfers. The E5502’s socket 1366 compatibility also opens an upgrade path to higher-core-count Gainestown and later Westmere processors, provided the motherboard’s BIOS supports them. This is a significant consideration for system longevity, as a server initially deployed with the E5502 can be upgraded to a six-core part in the same socket, extending the platform’s useful life without a full motherboard replacement.

The processor’s architecture, codenamed Gainestown, represents the first generation of Xeon processors to integrate the memory controller on-die, reducing memory latency compared to older front-side-bus designs. The 4 MB shared L3 cache is accessible by both cores, enabling efficient data sharing between threads. The motherboard must support the 80 W TDP envelope and the 1866 MHz base clock, but this is a standard requirement for socket 1366 boards. The processor does not have an unlocked multiplier, so overclocking is not a supported feature, aligning with its server-focused positioning where stability is prioritized over frequency flexibility.

How It Compares

The fact pack does not provide specific rival processors or their benchmark scores, so a direct numerical comparison against named competitors is not possible from the available data. However, the 50th percentile ranking offers a general reference point: the E5502 performs at the median of all CPUs in the database. This implies that it will be slower than any modern quad-core or higher processor with a similar or higher clock speed, but it may hold its own against other early dual-core server parts from the same era that lack the L3 cache or memory bandwidth advantages of the Nehalem architecture.

Against a hypothetical rival with a similar dual-core design but a lower clock speed, the E5502’s 1.87 GHz frequency would be a deciding factor in single-threaded tasks, where the higher clock wins. Conversely, a rival with a higher frequency but a smaller cache would lose in cache-sensitive workloads, where the 4 MB shared L3 gives the E5502 an edge. In multi-threaded scenarios, the 2-core/2-thread configuration is a strict limitation, and any rival with 4 or more cores will outperform it by virtue of parallel execution capacity, regardless of clock speed differences.

The lack of a boost clock is a notable differentiator, as many rival processors offer dynamic frequency scaling to improve single-thread performance when other cores are idle. The E5502’s fixed frequency means that its single-thread performance is constant, which can be an advantage in latency-sensitive applications where predictable response times are more important than peak throughput. For server workloads that are heavily multi-threaded, the E5502 will fall behind, but for low-concurrency tasks with high data reuse, the large cache and triple-channel memory can partially compensate for the low clock.

Single-Thread vs Multi-Thread Behavior

The E5502’s performance profile is defined by its 2-core/2-thread configuration and a fixed base clock of 1.87 GHz. In single-threaded workloads, the processor’s performance is entirely dependent on its per-core execution efficiency and the latency of its cache hierarchy. The Nehalem architecture’s out-of-order execution engine is capable of sustaining high instruction throughput per clock, and the 64 KB L1 data cache per core provides low-latency access to frequently used data. The 256 KB L2 cache per core is small by modern standards, but it is effective for the working sets of typical server processes such as web serving or light database queries.

The lack of a boost clock means that single-threaded performance is the same whether one core or both are active, which ensures consistent response times in mixed workloads. In multi-threaded scenarios, the processor can execute exactly two threads simultaneously, with no hyper-threading to increase logical core count. This is the primary bottleneck: any workload that scales beyond two threads will see a hard ceiling at 2x the single-thread performance, assuming perfect scaling. The 4 MB shared L3 cache helps in multi-threaded cases by allowing both cores to access a common pool of cached data, reducing the need to fetch from system memory, which is a significant latency penalty.

The triple-channel DDR3 memory interface provides ample bandwidth for two cores, preventing memory starvation in data-intensive operations. However, the 80 W TDP and modest clock suggest that the processor is not designed for high-frequency, latency-sensitive single-threaded applications like financial trading or real-time analytics. Instead, the E5502 is better suited for environments where the number of concurrent threads is low, but each thread requires a stable and predictable execution environment. For workloads that are inherently sequential, the fixed 1.87 GHz clock will be the limiting factor, and the processor will lag behind higher-clocked rivals. For workloads that can be partitioned into two independent threads, the E5502 provides a balanced, if unspectacular, level of performance, with the memory subsystem and cache hierarchy providing more value than the raw clock speed.