Intel Core i5-2515E

The Intel Core i5-2515E is a dual-core mobile processor from the Sandy Bridge generation, targeting the 11th percentile of all CPUs in the benchmark database. Its average benchmark score of 550 places it in the entry-level performance tier for its era, though the data shows it is functionally tied with a cluster of similarly aged desktop and mobile parts. The most striking aspect of its benchmark profile is the wide gap between its single-thread and multi-thread scores, which reveals a chip with competent per-core performance but limited overall throughput due to its two-core, four-thread configuration.

Benchmark Performance

The Core i5-2515E's benchmark results paint a picture of a processor that was modest even at its launch, and the data confirms it sits at the low end of modern performance expectations. In Cinebench R23, the chip scores 225 points in the single-core test and 1,599 points in the multi-core test. The multi-core figure is more than seven times the single-core score, which is expected for a dual-core part with Hyper-Threading, but the absolute numbers indicate that the processor struggles with heavily threaded workloads by contemporary standards. The Cinebench R20 results follow a similar pattern, with a single-core score of 94 and a multi-core score of 671, while the older Cinebench R15 multi-core test yields 161 points.

When compared to its nearest rivals, the i5-2515E is essentially in a statistical dead heat. Its average benchmark score of 550 is exactly equal to the AMD PRO A6-8550B's 550, resulting in a delta of 0 percent. The Intel Core i5-2510E, a near-identical sibling, posts an average score of 551, which puts the 2515E 0.1 percent behind — a negligible margin that falls well within run-to-run variance. The AMD A6-9500 scores 549, making the 2515E 0.3 percent faster, and the AMD Athlon II X3 450 scores 547, putting the 2515E 0.5 percent ahead. These deltas are all under one percent, meaning that the 2515E's performance is indistinguishable from its direct competitors in aggregate benchmarks. The data does not support any claim of a meaningful performance advantage or disadvantage against this specific rival group; the processor is simply part of a tightly packed cluster of low-end parts.

Power and Thermals

The Core i5-2515E carries a thermal design power (TDP) rating of 35 watts, which classifies it as a low-power mobile processor. This TDP figure is notable because it sits between the ultra-low-voltage parts (typically 15-28 watts) and the standard-voltage mobile chips (often 45 watts or higher) of its generation. For a dual-core Sandy Bridge processor, the 35-watt envelope is generous enough to allow the chip to maintain its 2.50 GHz base clock under sustained load without aggressive power throttling. The 32 nm process node, which packs 624 million transistors into a 149 mm² die, contributes to this efficiency profile.

From a cooling standpoint, the 35-watt TDP implies that the processor requires only a modest cooling solution. A thin-and-light laptop chassis with a small heatpipe and a low-profile fan would be sufficient to manage thermals, and the chip could even operate in a passively cooled system under light workloads, though sustained multi-threaded loads would likely push temperatures beyond passive limits. The integrated Intel HD 3000 graphics adds to the thermal load but does not change the fundamental cooling class. The data suggests that this is a part designed for portability over performance, where the 35-watt TDP enables a thinner form factor than a 45-watt quad-core alternative.

Platform and Compatibility

The Core i5-2515E uses the Intel BGA 1023 socket, which means it is soldered directly to the motherboard and is not user-replaceable. This socket is exclusive to the Sandy Bridge mobile platform, and the processor is compatible only with chipsets designed for that generation. The chip supports DDR3 memory through a dual-channel memory bus, which was standard for the era. Notably, ECC memory is not supported, so this processor is unsuitable for error-correcting workloads that require data integrity guarantees.

The platform does not expose any PCIe information in the available data, but as a Sandy Bridge part, it would have been paired with a chipset providing PCIe 2.0 lanes for discrete graphics and storage expansion. The upgrade path is effectively nonexistent due to the BGA socket — the processor is permanently attached to its board, and the end-of-life production status means no future compatibility is planned. The 2.50 GHz base clock is the only operating frequency listed, with no boost clock data available, so the processor's maximum frequency under load is not documented. The lack of an unlocked multiplier further reinforces that this is a fixed, low-power part with no overclocking headroom. The part number SR075 identifies this specific stepping, and the release date of January 31, 2011, places it at the beginning of the Sandy Bridge mobile rollout.

How It Compares

Against the AMD PRO A6-8550B, the Core i5-2515E is perfectly matched. Both processors post an average score of 550, and the zero percent delta means that in aggregate benchmarks, neither chip has any edge over the other. The PRO A6-8550B is a desktop-oriented part, so the fact that a mobile chip with a 35-watt TDP can match it suggests the i5-2515E holds up well in raw compute despite its lower power envelope.

The Intel Core i5-2510E is the closest sibling to the 2515E, and the data shows they are effectively the same processor. The 2510E's average score of 551 gives it a 0.1 percent lead, which is within measurement noise. This near-identical performance is expected given that both parts share the same Sandy Bridge dual-core architecture, the same 2.50 GHz base clock, and the same 35-watt TDP class. The 2515E is essentially a re-binned or slightly adjusted variant of the 2510E.

The AMD A6-9500, with an average score of 549, trails the 2515E by 0.3 percent. This is another negligible margin, but it is worth noting that the A6-9500 is a desktop processor from a later generation, yet it cannot pull ahead of the older Intel mobile chip. The 2515E's single-thread performance likely carries it, as the A6-9500's architecture was not known for strong per-core efficiency.

The AMD Athlon II X3 450 is a triple-core desktop part, and its average score of 547 puts it 0.5 percent behind the 2515E. Despite having an extra physical core, the Athlon II's older architecture and lack of Hyper-Threading mean its multi-threaded advantage is offset by weaker single-thread performance. The data shows the 2515E holding a slight edge, which underscores the importance of architectural efficiency over raw core counts.

Single-Thread vs Multi-Thread Behavior

The Core i5-2515E exhibits a profound imbalance between its single-thread and multi-thread capabilities. In Cinebench R23, the single-core score of 225 is respectable for a 2.50 GHz Sandy Bridge part, indicating that the architecture's per-core efficiency was competitive at the time of release. However, the multi-core score of 1,599 is only about seven times the single-core score, which is a far cry from the ideal scaling of 8x that a perfect four-thread processor would achieve. This suggests that thread scheduling overhead and shared L3 cache contention (3 MB shared across both cores) limit the multi-threaded gains.

In real workloads, this split means the i5-2515E is well-suited for applications that rely primarily on single-threaded performance, such as web browsing, office productivity, and legacy software. The 2.50 GHz base clock, without any boost clock data, means the processor runs at a fixed frequency, so there is no transient single-core speed-up available. For multi-threaded tasks like video encoding, 3D rendering, or batch photo processing, the dual-core design with Hyper-Threading provides only modest throughput, and the Cinebench R20 multi-core score of 671 confirms that heavily threaded workloads will struggle. The data indicates that this processor is best matched to light, latency-sensitive tasks rather than sustained parallel compute, and its 11th percentile standing among all CPUs reinforces that it is a legacy part that should not be expected to handle modern multi-threaded applications with any degree of comfort.