Intel Atom Z515

The Intel Atom Z515 is a single-core mobile processor from the Silverthorne generation, built on Intel's 45 nm process. It is a legacy part, now end-of-life, that was designed for a very specific low-power niche rather than general-purpose computing, and its benchmark data reflects that narrow positioning.

Platform and Compatibility

The Atom Z515 uses the Intel BGA 441 socket, which is a ball-grid array package soldered directly to the motherboard. This means there is no upgrade path in the traditional sense: the processor is not a socketed part that can be swapped out, and the platform is tied to the specific motherboard it ships on. For a builder looking at this today, the platform is a closed system, and any consideration of the Z515 must account for the fact that the CPU and board are effectively a single unit. The chip is part of the Atom (Silverthorne) architecture generation, which targets mobile and embedded applications where physical size and power draw are the primary constraints.

Memory support is not specified in the available data, which means the Z515 does not carry a defined memory type or bus configuration in its official specifications. In practical terms, this indicates that memory compatibility is determined entirely by the motherboard chipset, not the CPU. The integrated graphics are similarly delegated to the chipset, with the data noting that graphics are available "On certain motherboards (Chipset feature)". This is a critical distinction: the Z515 itself contains no graphics silicon, so visual output depends entirely on the accompanying chipset. For PCIe, no specification is provided, and given the platform's era and target market, expansion capabilities are likely minimal or non-existent. The Z515 does not support ECC memory, and its multiplier is locked, so there is no overclocking headroom.

Single-Thread vs Multi-Thread Behavior

The Z515 is a single-core, single-thread processor with a base clock of 1200.00 MHz and no boost clock. There is no multi-threading capability, so every workload runs on exactly one logical processor. This creates a stark performance profile: the chip can only ever execute one stream of instructions, and its frequency of 1200.00 MHz is the absolute ceiling for any task. In single-threaded workloads, the data shows that the Z515 would be entirely dependent on its architectural efficiency per clock, and with only one core, there is no fallback for parallel tasks.

For real-world use, this means the Z515 is suited only for the simplest of tasks: basic text entry, lightweight embedded control, or as a dedicated controller in a device where the operating system is minimal. Multi-threaded performance is effectively non-existent because there are no additional threads to offload work to. The 1 core / 1 thread configuration is a hard limit, and any modern operating system or application that expects even modest parallelism will perform poorly. The percentileVsAllCpus score of 50 is a curious data point here; it suggests that, against the full historical database of CPUs, the Z515 sits at the median, which is a reminder that many processors are equally limited or worse. However, this percentile does not reflect usability in modern workloads — it is a historical comparison against other CPUs, many of which are also obsolete.

Power and Thermals

The defining characteristic of the Z515 is its thermal design power (TDP) of 1 watt. This is an extraordinarily low figure, and it dictates every aspect of the platform's design. A 1 W TDP means the chip generates almost no heat, so it does not require an active cooling solution in most implementations. A simple passive heat spreader or even a thermal pad attached to the device chassis would be sufficient to keep the Z515 within operating temperatures. This is the primary reason to consider this part at all: it enables fanless, silent operation in compact devices.

The 45 nm process node, with 47 million transistors on a 26 mm² die, is relatively large for the era, but the low clock speed and single-core design keep power draw minimal. For a builder or system integrator, the cooling tier implied by a 1 W TDP is the lowest possible — no heatsink with fins, no heat pipes, and certainly no liquid cooling. The data does not provide a boost clock, which means there is no transient power spike to manage; the chip runs at a constant 1200.00 MHz and a constant power draw. This makes thermal design predictable, but it also means there is no performance headroom for bursty workloads.

How It Compares

The FACT PACK lists no nearest rivals for the Z515, and its benchmark results are empty. This is a meaningful absence: it indicates that the Z515 does not have a competitive set in the database, likely because it is so far removed from mainstream processors that comparison is not meaningful. In the absence of direct rivals, the only reference point is the percentileVsAllCpus score of 50, which places it in the middle of all CPUs ever benchmarked. This is not a strong recommendation; it simply reflects that half of all processors in the database are equally slow or slower.

Without rival data, there are no specific delta percentages to cite, and no comparative analysis against other Atom parts, Celeron chips, or ARM alternatives is possible from the available facts. The Z515 exists in a vacuum in this dataset, which reinforces its status as a niche, end-of-life product. Any discussion of its relative performance must be qualitative: it is a single-core, 1.2 GHz chip from 2009, and that is all the data supports.

Benchmark Performance

The benchmark data for the Z515 is entirely empty, with an avgBenchmarkScore of 0. This is not a score of zero in the sense of a failed test; it is a placeholder indicating that no benchmark results have been recorded for this processor in the database. Consequently, there are no exact percentage deltas to report against any rival, because no rivals are listed either. The only numerical performance indicator is the percentileVsAllCpus value of 50, which is a rank, not a score. It tells us that, in the historical distribution of all CPUs, the Z515 sits at the 50th percentile — meaning half of all processors in the database score higher and half score lower.

Interpreting this percentile requires caution. It does not mean the Z515 is a "middle-of-the-road" chip in practical terms. The database includes many equally ancient and low-power parts, so the 50th percentile is a reflection of the full historical spectrum, not a statement of modern relevance. The 1200.00 MHz clock speed is the sole performance number available, and it is low enough to indicate that the Z515 is only suitable for tasks that are not compute-intensive. The lack of a boost clock and the absence of any multi-threading further reinforce that the Z515's performance ceiling is fixed and low.

FAQ

Q: What socket does the Intel Atom Z515 use?

A: The Z515 uses the Intel BGA 441 socket, which is a soldered ball-grid array package with no upgrade path.

Q: Does the Z515 support ECC memory?

A: No, the data specifies that ECC memory is not supported.

Q: What is the clock speed of the Z515?

A: The base clock is 1200.00 MHz, and there is no boost clock listed.

Q: Is the integrated graphics included on the CPU?

A: No, integrated graphics are a chipset feature, available only on certain motherboards, not on the Z515 itself.

Q: What is the thermal design power of the Z515?

A: The TDP is 1 watt, which allows for fanless, passive cooling in most designs.

Q: Can the Z515 be overclocked?

A: No, the multiplier is locked, and the data lists no unlocked multiplier support.

Q: How many cores and threads does the Z515 have?

A: It has 1 core and 1 thread, with no multi-threading capability.

Q: When was the Z515 released?

A: The release date is listed as 2009-04-07, and the production status is end-of-life.