Intel Pentium E6600

The Intel Pentium E6600 is a desktop dual-core processor from Intel's Core 2 architecture, released in January 2010 on the Socket 775 platform. With two cores and two threads at a base clock of 3.07 GHz, it represents an early dual-core design that now sits at the 2nd percentile of all CPUs, meaning it outperforms only about 2% of the processors tracked in this database. Its average benchmark score of 345 across all tests places it in the same performance tier as a handful of other low-end parts from the same era.

Single-Thread vs Multi-Thread Behavior

The E6600 has two physical cores and no hyper-threading, so it can execute only two threads simultaneously. This is reflected in the benchmark scores: in Cinebench R20, the single-core score is 59, while the multi-core score is 421; in Cinebench R23, the single-core score is 141 and the multi-core score is 1004. The multi-core results are several times higher than the single-core results, which is expected for a dual-core part that scales well across two threads. However, the absolute values are extremely low by modern standards—the R23 single-core score of 141 is far below what even entry-level mobile CPUs achieve today.

The gap between single- and multi-thread performance is consistent with a processor that has no boost clock and a fixed 3.07 GHz operating frequency. For real-world workloads, this means that lightly threaded applications (such as older office suites or basic web browsing) will run at the full single-core speed, but any task that can utilize both cores will see a substantial improvement. Conversely, workloads that rely on more than two threads will stall, as the CPU cannot handle additional concurrent tasks. The data suggests that the E6600 is best suited to single-threaded or dual-threaded legacy applications, and it will struggle with modern multi-threaded software.

Power and Thermals

The E6600 carries a thermal design power (TDP) of 65 watts. This is a modest figure for a desktop processor, indicating that a simple air cooler is sufficient to keep it within safe temperatures. The 45 nm process node and 228 million transistors on an 82 mm² die contribute to this relatively low power draw. In practice, the 65 W TDP means the CPU does not demand exotic cooling solutions; a standard Intel stock cooler or a basic third-party air cooler would be adequate. There is no integrated graphics on the die itself—the graphics capability is a chipset feature on certain motherboards, so the CPU's power envelope is purely for the compute cores and cache.

Given its age and end-of-life status, thermal performance is not a concern for modern use, but the 65 W rating does imply that the E6600 can be passively cooled in some low-airflow cases, provided the motherboard and chipset support such a configuration. The lack of a boost clock also means power draw stays relatively constant under load, avoiding the spikes seen in modern turbo-boosting parts.

Benchmark Performance

Across the available Cinebench tests, the E6600 produces scores that are uniformly low. In Cinebench R15 multi-core, it scores 101; in R20 multi-core, 421; and in R23 multi-core, 1004. The single-core results are 59 (R20) and 141 (R23). These numbers place the CPU in the 2nd percentile of all CPUs, meaning 98% of processors in the database are faster. The average benchmark score across all tests is 345, which serves as a composite indicator of its overall performance level.

Comparing to its nearest rivals, the E6600 is essentially tied with three other parts. The AMD A4-3330MX has the same average score of 345, with a delta of 0%. The Intel Pentium E5800 also scores 345, but with a delta of -0.1%, indicating a negligible difference. The Intel Celeron 3755U likewise scores 345 with a -0.1% delta. The Intel Pentium E6500 scores 343, with a +0.5% delta relative to the E6600, meaning the E6600 is marginally faster. These deltas are all within half a percentage point, so the E6600 is effectively indistinguishable from these competitors in raw benchmark terms.

The percentile ranking of 2 is the most telling metric: it signals that the E6600 is not merely old, but is positioned at the very bottom of the performance spectrum. For context, a modern dual-core CPU would typically land in the 30th to 50th percentile, while high-end parts exceed the 90th percentile. The E6600's scores are only suitable for extremely light tasks, and even those will feel sluggish by contemporary standards.

How It Compares

AMD A4-3330MX: The A4-3330MX matches the E6600's average benchmark score of 345, with a delta of 0%. This makes the two parts functionally equivalent in overall performance, though they come from different platforms and architectures. The A4-3330MX is a mobile processor, while the E6600 is desktop-only, but the benchmark data shows no meaningful difference between them.

Intel Pentium E5800: The E5800 posts an average score of 345, with a delta of -0.1% relative to the E6600. This is a negligible difference, well within measurement noise. Both are Socket 775 parts, and the E5800 is essentially a slightly lower-clocked sibling of the E6600. In practice, users would not notice any performance gap.

Intel Celeron 3755U: The Celeron 3755U also scores 345 with a -0.1% delta. Despite being a much newer Celeron (from a later generation), its performance is on par with the E6600, illustrating how far the low-end has stagnated in absolute terms. The 3755U is a mobile chip, but the benchmark results show it is no faster than the 2010 desktop Pentium.

Intel Pentium E6500: The E6500 scores 343, which is 0.5% lower than the E6600's average. This makes the E6600 the faster of the two, but the difference is marginal. Both are dual-core Wolfdale parts, and the E6600's higher base clock (3.07 GHz vs the E6500's unspecified clock) likely accounts for the small lead.

FAQ

Q: Does the Intel Pentium E6600 support hyper-threading?

A: No. It has 2 cores and 2 threads, meaning it can handle only two concurrent threads.

Q: What memory types are supported?

A: The E6600 supports DDR1, DDR2, and DDR3 memory, all in a dual-channel configuration. ECC memory is not supported.

Q: What socket does the E6600 use?

A: It uses the Intel Socket 775, a platform that is now obsolete and no longer produced.

Q: Does it have integrated graphics?

A: No, the CPU itself does not contain a graphics unit. However, certain motherboards with a compatible chipset can provide graphics output, as noted in the fact pack.

Q: Is the multiplier unlocked?

A: No, the multiplier is locked, so overclocking via multiplier adjustment is not possible.

Q: When was it released?

A: The release date is January 16, 2010, and the processor is now end-of-life.

Who Should Consider It

The E6600 is only suitable for very basic, legacy tasks. Its 2nd percentile ranking and sub-150 single-core Cinebench R23 score mean it cannot handle modern gaming, video editing, or even moderately complex office workloads. It might be acceptable for running a lightweight Linux distribution, simple word processing, or as a secondary machine for retro computing. Users who need to run 32-bit or early 64-bit applications from the Windows XP/Vista era could find it adequate, but the lack of modern instruction sets and low memory bandwidth will be limiting.

For anyone considering this CPU for a current build, the data strongly advises against it. Even the nearest rivals are all equally slow, and the platform itself (Socket 775) has no upgrade path to newer processors. If the goal is to preserve a vintage system or replace a failed CPU on an existing 775 motherboard, the E6600 is a functional option, but it should not be used as a primary daily driver.

Platform and Compatibility

The E6600 fits into the Intel Socket 775 platform, which was common in desktops from the mid-2000s to early 2010s. It supports dual-channel memory across DDR1, DDR2, and DDR3, though the motherboard must match the specific memory type. The PCIe interface is Gen 2, which is adequate for older graphics cards and expansion cards. There is no integrated graphics on the CPU; display output depends on the motherboard's chipset, which may or may not include a GPU.

The production status is end-of-life, meaning Intel no longer manufactures or sells this part. The Socket 775 platform is obsolete, and new motherboards are not available. Upgrading from the E6600 would require a complete platform change—new motherboard, memory, and likely a new power supply—since modern CPUs use different sockets and memory standards. For those already on a Socket 775 system, the E6600 is a drop-in replacement for other dual-core Pentium or Celeron parts, but it offers no meaningful performance headroom. The 65 W TDP ensures compatibility with most 775-era coolers and power delivery systems, but the overall platform is far beyond its useful life for any demanding workload.