Intel Atom E665C

How It Compares

The Intel Atom E665C sits in a peculiar position. Its nearestRivals list is empty, meaning the benchmark database contains no directly comparable processors with scores close enough to establish meaningful percentile deltas. This is not an oversight — it reflects the chip's narrow embedded/mobile role. The data shows a 50th percentile ranking among all CPUs tracked, which places it dead-center in the database's historical distribution. That midpoint ranking, however, is misleading: the percentile is computed across every processor ever benchmarked, including far more capable desktop and server parts. The E665C's actual competition in its lifetime would have been other low-power Atoms, but no rival scores are recorded here to quantify that.

Without nearest rivals, the analysis must rely on absolute figures. The E665C delivers a single physical core with two threads at a base clock of 1300.00 MHz. There is no boost clock, so performance is fixed and predictable. Its 4 W TDP is the headline feature — extremely low power draw for fanless or passively cooled industrial designs. In the context of the database, this is a chip that trades every ounce of throughput for efficiency. The empty rival list also signals that the database lacks other 2010-era ultra-low-power parts with comparable benchmark coverage, so any positional claims beyond the percentile are unsupported.

Platform and Compatibility

The E665C uses the Intel BGA 1466 socket, which is a soldered, non-upgradeable package. There is no socket to swap chips in and out — the processor is permanently attached to the board. This makes the platform a closed system: what you buy is what you get for the life of the device. The architecture is Atom, under the codename Stellarton, built on Intel's 45 nm process node with 47 million transistors on a 26 mm² die. That process and transistor count are modest even for the era, reflecting the chip's minimalistic design goals.

Memory support is limited to DDR2, with no ECC capability. The FACT PACK lists no memory bus width or bandwidth figures, so precise throughput numbers are unavailable. What is clear: DDR2 is an older standard, and the lack of ECC means this platform is not aimed at memory-integrity-critical workloads like financial transaction processing or long-running scientific computations. The integrated graphics are GMA 600, a basic GPU that handles display output but nothing demanding. PCIe support is not listed, so expansion capability is undefined in this dataset — treat it as minimal, consistent with an embedded part.

The upgrade path is effectively zero. BGA 1466 means the CPU is not removable. The production status is "End-of-life," and the release date is 2010-11-21, which places it in the early Atom era. The part number is SLH9X, and the multiplier is locked, so no overclocking headroom exists. For a builder, this is a fixed-function component: you select it for a specific embedded task, not for future flexibility.

Benchmark Performance

The benchmark data is stark: the E665C has no recorded benchmark scores, and its average benchmark score is 0. The percentileVsAllCpus field shows 50, but that is a placeholder derived from the empty score distribution, not a measured outcome. In practical terms, this means the database cannot provide a performance delta against any rival. There are no percentage comparisons to cite, because no rival entries exist.

The absence of scores is itself informative. The E665C was not a part that enthusiasts benchmarked. It shipped into industrial PCs, point-of-sale terminals, and similar low-power appliances where synthetic testing is rarely performed. The 1300.00 MHz single-core clock, with two threads via Hyper-Threading, would produce enough throughput for lightweight control tasks, but the data does not support any claim beyond that. The 4 W TDP, combined with the 45 nm process, suggests thermal behavior is trivial — no active cooling required — but again, no wattage or temperature figures are in the pack beyond the TDP value itself.

What the data does allow: the E665C's performance envelope is bounded by its clock speed and core count. With one core and two threads, multi-threaded workloads would see near-zero scaling beyond the single thread's capability. The lack of a boost clock means sustained load performance equals idle performance — no turbo headroom to exploit. In the database's percentile ranking, it sits at the median, but that is a statistical artifact of the empty benchmark set, not a sign of competitive mid-pack performance.

FAQ

Q: Does the Intel Atom E665C support ECC memory?

A: No. The FACT PACK lists eccMemory as false, so the processor cannot use error-correcting memory modules.

Q: Is the multiplier unlocked for overclocking?

A: No. The multiplierUnlocked field is false, and the chip has no boost clock, so frequency is fixed at 1300.00 MHz.

Q: What socket does the E665C use, and can I upgrade it later?

A: It uses Intel BGA 1466, which is a soldered package. The CPU is not removable, so there is no upgrade path.

Q: What integrated graphics does this processor include?

A: The integrated graphics are GMA 600, which provides basic display output capability.

Q: What is the production status of the E665C?

A: The production status is "End-of-life," meaning it is no longer manufactured. The release date was 2010-11-21.

Q: How many cores and threads does the E665C have?

A: It has 1 core and 2 threads, with a base clock of 1300.00 MHz and no boost clock.

Who Should Consider It

The E665C is not a gaming processor. With one core, two threads, and GMA 600 graphics, any modern game would be unplayable, and the database contains no gaming benchmark scores to suggest otherwise. The 1300.00 MHz clock and lack of boost mean frame rates would be bottlenecked entirely by the CPU's single-thread throughput. Similarly, content creation — video editing, 3D rendering, large photo manipulation — is out of the question. Multi-core rendering workloads require multiple physical cores, and this chip has exactly one. The 2-thread capability helps with light multitasking (e.g., a background process while the foreground app runs), but that is the ceiling.

The realistic buyer is someone deploying an embedded or industrial system where the 4 W TDP is the primary specification. Fanless designs, battery-powered handhelds, or always-on appliances benefit from a chip that generates negligible heat. The 45 nm process and 47 million transistors indicate a mature, low-complexity design that is easy to integrate. The DDR2 memory support suggests legacy system compatibility — a board designer reusing existing DDR2 inventory would find this a drop-in option. The GMA 600 graphics handle simple display output for a control panel or status screen. Office work, such as word processing or spreadsheet entry, is technically possible but would feel sluggish by modern standards; the single core and 1300.00 MHz clock limit even basic productivity to single-threaded tasks.

The 50th percentile ranking, while statistically meaningless due to zero benchmark scores, at least places it in the middle of the database's historical range. That is a generous interpretation — in real-world use, this chip is at the very bottom of performance for anything beyond basic control logic. Buyers should consider it only if the application is defined by power limits and fixed-function operation, not by throughput demands.

Single-Thread vs Multi-Thread Behavior

The E665C has a 1-core, 2-thread configuration. The single-thread performance is determined entirely by the 1300.00 MHz base clock, with no boost to raise it under load. This means single-threaded workloads run at a constant, predictable speed. The two threads allow the single core to handle two tasks concurrently via time-slicing, but the physical execution resources are shared. In practice, multi-threaded performance would be slightly better than a pure single-core chip without threads, but nowhere near a dual-core part. The database provides no scores to quantify this, so the analysis rests on the core and clock figures.

For real workloads, the split is stark. Single-thread tasks — legacy applications, simple scripting, serial communication protocols — run at the fixed 1300.00 MHz rate. There is no burst behavior, so latency is consistent. Multi-thread tasks, such as running a web server with concurrent connections or a logging daemon with background compression, will see the second thread absorb some of the load, but the shared core means neither thread gets full throughput. The 64 KB L1 and 512 KB L2 caches are per-core, so both threads share those 512 KB of L2, which is small by any standard. Cache misses would be frequent in any data-intensive workload, further limiting multi-thread effectiveness.

The absence of a boost clock is the defining trait. Modern processors ramp frequency under load; the E665C cannot. This makes it ideal for hard real-time or deterministic applications where consistent timing matters more than peak speed. But for interactive use, the lack of turbo means every task — even a brief UI refresh — runs at the same deliberate pace. The multi-thread behavior is best described as "cooperative" rather than "parallel": two threads share one core's execution units, and the scheduler must interleave them. For a workload that can be split into two independent, low-intensity threads (e.g., a sensor polling loop plus a data logger), the E665C is adequate. For anything that expects true concurrent execution on separate physical cores, it is not.