Intel Atom Z500

Intel Atom Z500 is a single-core, single-thread mobile processor from Intel’s Silverthorne generation, built on a 45 nm process with a 47 million transistor count and a 26 mm² die size. Launched in April 2008 for the Intel BGA 441 socket, this part targets the lowest power envelope in the Atom lineup, with a thermal design power of just 1 watt. The chip carries 56 KB of L1 cache and 512 KB of L2 cache per core, and its integrated graphics are available only on certain motherboards as a chipset feature, not on the processor die itself. Production status is end-of-life, and the part number is SLB6Q.

Single-Thread vs Multi-Thread Behavior

The Intel Atom Z500 is a fundamentally single-threaded design: one core, one thread, no boost clock. Its base clock is fixed at 800.00 MHz, and there is no turbo or dynamic overclocking capability, as the multiplier is locked. This means the processor’s performance profile is entirely dependent on that single execution stream — there is no parallel headroom for multi-threaded workloads, and the chip cannot adapt its frequency to transient load spikes.

In real-world terms, this split is stark. Any application that can use multiple cores or threads will see zero benefit from the Z500, because the operating system simply has no additional logical processors to schedule work onto. For single-threaded tasks, the 800 MHz clock is the sole driver of performance; the data shows no boost path, so the chip’s response to a burst of activity is identical to its steady-state throughput. This makes the Z500 suitable only for the most basic sequential workloads, such as simple control logic, lightweight data logging, or single-threaded firmware tasks.

The lack of a boost clock also means the processor’s thermal and power behavior is highly predictable — it runs at a constant rate, with no frequency ramps to complicate cooling or battery life predictions. The 56 KB L1 and 512 KB L2 cache are modest, but they are per-core, meaning the lone core has exclusive access to that storage. This mitigates some of the latency penalty of a low clock speed, but it does nothing to address the fundamental absence of multi-threading. Benchmark results, where available, would reflect this bimodal reality: single-thread scores would be low but consistent, while any multi-thread metric would be identical to the single-thread score, since there is only one thread.

Power and Thermals

The Atom Z500 is defined by its 1-watt TDP, which places it in an extreme low-power class. This is not a typo — the entire processor is rated for one watt of thermal dissipation, which is lower than most individual components on a typical motherboard. For context, this TDP class implies a passive cooling solution is not just sufficient but almost mandatory; a fan would consume more power than the CPU itself. The chip’s 45 nm process, with 47 million transistors on a 26 mm² die, is designed for minimal leakage at this power level.

The cooling tier implied by a 1-watt TDP is the absolute entry level: a small heatsink, or even just the thermal coupling of the package to a chassis, is enough. There is no thermal headroom for overclocking — the multiplier is locked, and the base clock is fixed at 800 MHz — so the chip cannot be pushed beyond its design envelope. The socket is Intel BGA 441, a ball-grid array that is soldered directly to the motherboard, which reinforces the low-power, embedded-oriented nature of the design. No memory support is listed in the data, which suggests the chip relies on external chipset-provided memory controllers, further reducing its own power draw.

The end-of-life production status means this is legacy hardware, but the power characteristics remain a reference point for ultra-low-power design. The fact that the TDP is exactly 1 watt — not 1.5 or 2 watts — indicates a tightly controlled power budget. In practical terms, this implies a cooling solution of a small passive heat spreader is adequate, and system builders would not need to account for any significant airflow. The absence of a boost clock means no transient thermal spikes, so the cooling solution never needs to handle peak loads beyond the steady-state 1-watt dissipation.

Benchmark Performance

The benchmark data for the Atom Z500 is sparse: the average benchmark score is 0, and the benchmarks array is empty. The percentile vs all CPUs is 50, which is an unusual mid-pack placement given the hardware specs — this likely reflects the fact that the database includes many similarly low-power embedded parts, rather than a comparison against desktop processors. With no benchmark scores recorded, the performance analysis must be derived from the architecture and clock speed rather than direct measurements.

The single-core, single-thread configuration at 800 MHz places the Z500 at the very bottom of any performance hierarchy. For a modern reference point, a typical desktop processor runs at several times this clock speed with multiple cores and much larger caches. The Z500’s L2 cache of 512 KB is small by modern standards, but it is per-core, which means no cache sharing overhead. The 56 KB L1 is split between instruction and data (though the exact split is not specified), but again, it is entirely dedicated to the single thread.

Without nearest rivals listed in the data, there are no exact percentage deltas to report. The percentile of 50 suggests that half of all CPUs in the database are slower or equal to this chip, which is a counterintuitive result for a 2008 low-power processor. This is likely because the database’s CPU population includes many other Atom and embedded parts with similar or lower specs. However, the absolute performance is clearly minimal: no boost clock, no multi-threading, and a base clock under 1 GHz. Any workload that requires more than a single lightweight thread will be bottlenecked entirely by the 800 MHz execution rate.

How It Compares

The nearestRivals array is empty in the data, so there are no direct rival comparisons with names, scores, or deltaPct values to cite. This is notable because most processors in a benchmark database have at least a few adjacent entries. The absence of rivals suggests the Z500 occupies a niche that is either unique or so low in performance that no other chip is statistically close. Without rival data, the comparison is limited to the architectural facts: the Atom Z500 is a 1-core, 1-thread processor at 800 MHz with a 1-watt TDP, which places it in a class of ultra-low-power embedded or handheld parts.

The lack of rivals also means no percentile-based deltas can be computed. The 50th percentile ranking is a statistical placeholder rather than a meaningful performance indicator, given that the benchmark score is zero. In a practical sense, the Z500 would compare unfavorably to any modern processor, but the data does not provide specific rival names or percentages to quantify that gap. The chip’s 512 KB L2 and 56 KB L1 are the only cache-related metrics, and they are per-core, so a hypothetical comparison to a multi-core part would show a massive cache deficit per thread — but again, no rival data is available to cite.

The market segment is Mobile, and the release date is April 2008, which positions the Z500 as an early netbook or embedded processor. Its 45 nm process is two generations behind the then-current mainstream, but the 1-watt TDP was a differentiator. Without rival scores, the analysis must conclude that the Z500’s performance is defined by its clock speed and core count, and that its position in the database is an artifact of the sparse benchmark data rather than a reflection of competitive strength.

FAQ

Q: How many cores and threads does the Intel Atom Z500 have?

A: The Atom Z500 has 1 core and 1 thread, with a base clock of 800.00 MHz and no boost clock.

Q: What is the thermal design power of the Z500?

A: The TDP is 1 watt, which implies a passive cooling solution is sufficient.

Q: Does the Z500 support ECC memory?

A: No, ECC memory is not supported.

Q: What is the process node and die size?

A: The process node is 45 nm, with 47 million transistors and a die size of 26 mm².

Q: Is the Z500 multiplier unlocked for overclocking?

A: No, the multiplier is locked, and the base clock is fixed at 800 MHz.

Q: What is the production status and release date?

A: The production status is end-of-life, and the release date was 2008-04-01.

Q: Does the Z500 have integrated graphics?

A: Integrated graphics are available on certain motherboards as a chipset feature, not on the processor itself.