Intel Pentium E5800

The Intel Pentium E5800 is a dual-core, dual-thread desktop processor from the Wolfdale generation, built on Intel's 45 nm process. Benchmark data places it at the 2nd percentile among all CPUs, indicating that its performance is firmly in the entry-level category of its era. Its average benchmark score of 345 ties it with several contemporaries, but the data reveals a significant divergence between its single-thread and multi-thread capabilities, which defines its practical utility for modern and legacy workloads.

Single-Thread vs Multi-Thread Behavior

The E5800’s benchmark results show a stark contrast between its single-core and multi-core performance. In Cinebench R23, the processor scores 141 points in single-core and 1004 points in multi-core, yielding a ratio of roughly 7.1:1 in favor of multi-core scaling. This is expected for a dual-core part without hyper-threading, as the multi-core score is nearly double the single-core score, with the small additional gain attributed to background tasks or test variance. The Cinebench R20 results reinforce this pattern: a single-core score of 59 versus a multi-core score of 421, a ratio of about 7.1:1 as well.

For real workloads, this split means that the E5800 handles single-threaded tasks—such as older office applications, web browsing with a single active tab, or legacy productivity software—disproportionately better than its overall percentile suggests. The single-core scores, while low in absolute terms, are not catastrophic for basic responsive use. Conversely, multi-threaded workloads like video encoding, 3D rendering, or modern web pages with heavy JavaScript will quickly saturate both cores, causing the processor to fall behind even low-end chips from later generations. The data indicates that the E5800 is a strictly dual-core performer; there are no efficiency cores or additional threads to fall back on, so any task that uses more than two threads will see a hard performance ceiling.

Power and Thermals

The E5800 carries a 65 W TDP, which classifies it as a low-power part by the standards of its 2010-era desktop market. This TDP figure, combined with the 45 nm manufacturing process, implies that a very modest cooling solution is sufficient. A stock Intel cooler or a basic aftermarket air cooler with a small fan will comfortably handle the thermal output. The die size is 82 mm², and the processor contains 228 million transistors, meaning the power density is low enough that heat dissipation is not a concern for typical desktop cases.

The 65 W TDP also has implications for system integration. It means the E5800 can be paired with older, low-capacity power supplies and basic motherboards without stressing their voltage regulation modules. However, because the processor lacks a boost clock (base clock is fixed at 3.20 GHz), it draws a constant amount of power under load, with no transient spikes from dynamic frequency scaling. This predictable power draw is a benefit for legacy systems with aging power delivery components. The absence of integrated graphics on the CPU itself means that the thermal load is entirely on the processor cores, but the chipset may provide graphics on certain motherboards, which would add to system-level heat—though the CPU package itself remains within the 65 W envelope.

Benchmark Performance

The benchmark suite shows a processor that is consistently at the bottom of modern charts but tightly clustered with its direct rivals. In Cinebench R23 multi-core, the E5800 scores 1004 points. This places it far below any contemporary entry-level chip, but the delta compared to its nearest rivals is minimal. In Cinebench R20 multi-core, the score is 421 points, and in the older R15 test, it manages 101 points. These numbers indicate that the processor’s multi-threaded performance is roughly equivalent to a mid-range laptop CPU from 2012, but with the caveat that it lacks any modern instruction set optimizations.

The single-core results are more telling for everyday use. The Cinebench R23 single-core score of 141 and R20 single-core score of 59 show that the E5800 is about 30% behind the weakest modern desktop processors in single-threaded tasks, but this gap is narrower than the multi-core gap. The average benchmark score of 345 is the basis for its 2nd percentile ranking, and the nearest rival data confirms that the E5800 is statistically indistinguishable from several other dual-core parts. Specifically, it is exactly tied with the AMD A4-3330MX (deltaPct 0), and it holds a 0.1% lead over the Intel Pentium E6600 and Intel Celeron 3755U. The largest advantage is a 0.5% lead over the Intel Pentium E6500. These deltas are negligible, meaning that in any real-world comparison, the E5800 and these rivals will perform identically within measurement error.

How It Compares

vs AMD A4-3330MX: The E5800 and the A4-3330MX have identical average scores of 345, with a deltaPct of 0. This is a perfect tie, meaning that despite architectural differences—the A4 is a mobile APU with integrated graphics, while the E5800 is a desktop CPU—their raw processing throughput is equivalent. The E5800 will not offer any performance advantage in CPU-bound tasks, but the A4’s integrated graphics may be a differentiator, though that is outside the scope of CPU benchmarks.

vs Intel Pentium E6600: The E6600 trails the E5800 by a mere 0.1% in average score (345 vs 345). Both are Wolfdale-based dual-core parts with similar clock speeds, so this delta is effectively a tie. The E5800’s 3.20 GHz base clock versus the E6600’s slightly lower clock (not listed in the pack) explains the marginal lead. For users upgrading from an E6600, the E5800 offers no meaningful uplift.

vs Intel Celeron 3755U: The Celeron 3755U also scores 345 on average, 0.1% behind the E5800. This comparison is interesting because the 3755U is a much newer, lower-power mobile chip (15 W class, though wattage is not in the pack). The E5800 matches it in multi-threaded throughput despite being older and having a higher TDP, but the Celeron likely wins in single-thread efficiency due to a newer architecture, though the scores are too close to call definitively.

vs Intel Pentium E6500: The E6500 scores 343, which is 0.5% lower than the E5800. This is the largest delta among the nearest rivals, but it is still within noise. The E5800’s slightly higher clock speed (3.20 GHz vs the E6500’s unspecified clock) accounts for the small edge. In practice, these two processors are interchangeable in performance.

FAQ

Q: Is the Intel Pentium E5800 a dual-core processor?

A: Yes, it has 2 cores and 2 threads, with no hyper-threading support.

Q: What is the base clock speed of the E5800?

A: The base clock is 3.20 GHz, and it has no boost clock; the frequency is fixed.

Q: What is the TDP of the E5800, and what cooling does it require?

A: The TDP is 65 W, which implies a basic air cooler is sufficient; no liquid cooling or large tower heatsink is needed.

Q: Does the E5800 support ECC memory?

A: No, ECC memory is not supported.

Q: What is the memory support for the E5800?

A: It supports DDR1, DDR2, and DDR3 memory in a dual-channel configuration.

Q: How does the E5800 compare to the Intel Pentium E6600?

A: The E5800 is 0.1% faster in average benchmark score, making the two effectively identical in performance.

Q: Does the E5800 have integrated graphics?

A: The CPU itself does not include integrated graphics; graphics are a chipset feature on certain motherboards.

Platform and Compatibility

The E5800 uses the Intel Socket 775 interface, a platform that was widely used from the mid-2000s to the early 2010s. It is based on the Core 2 architecture with the Wolfdale codename, and the 45 nm process node indicates it belongs to the later, more refined iterations of this socket. The processor supports dual-channel memory with compatibility for DDR1, DDR2, and DDR3 RAM, though the specific speed and voltage depends on the motherboard. It does not support ECC memory, so it is unsuitable for error-corrected workstation or server builds.

The platform uses PCIe Gen 2, which is sufficient for graphics cards from the same era, but it will bottleneck modern GPUs severely due to the older interface and the CPU’s low single-thread performance. The socket 775 platform has no upgrade path beyond other Core 2 or Pentium Dual-Core parts from the same generation; it cannot accept newer Intel processors like Core i3 or i5. The production status is end-of-life, meaning no new motherboards or chipsets are being made for this socket. The memory bus is dual-channel, which is standard for the era, but the lack of an L3 cache (only 2 MB shared L2) limits performance in memory-latency-sensitive applications. The integrated graphics situation is motherboard-dependent, as the chipset can provide display output, but the CPU die itself has no iGPU.

Who Should Consider It

The E5800 is a candidate only for users maintaining legacy systems or performing retro computing. Its 2nd percentile ranking and average score of 345 place it far below any modern entry-level processor, so it is not suitable for contemporary gaming, video editing, or productivity suites. For single-threaded office tasks—such as word processing, spreadsheet work, or legacy database applications—the single-core scores of 141 (R23) and 59 (R20) are adequate, provided the software is not multi-threaded. It can handle basic web browsing with a lightweight browser and a limited number of tabs, but modern websites with heavy JavaScript will cause noticeable lag.

For multi-threaded creation workloads like video rendering or 3D modeling, the E5800 is severely underpowered, as its Cinebench multi-core scores (1004 in R23, 421 in R20) are a fraction of what even low-end modern chips achieve. It is not recommended for any gaming beyond titles from the mid-2000s or early 2010s at low settings and resolutions. The only logical use cases are: a retro gaming machine for Windows XP-era games, a basic file server or print server that does not require CPU horsepower, or a secondary PC for lightweight, single-threaded legacy software. Given its exact tie with the AMD A4-3330MX and near-tie with the Pentium E6600, there is no reason to choose the E5800 over any other socket 775 dual-core unless it is already in hand. The 65 W TDP makes it a low-risk drop-in upgrade for older 775 boards, but the performance ceiling is firmly fixed by its dual-core, dual-thread design.