Intel Pentium Extreme Edition 840

The Intel Pentium Extreme Edition 840 is a dual-core desktop processor from 2005, built on the NetBurst architecture (codename Smithfield) using a 90 nm process at Intel’s foundry. It runs at a base clock of 3.20 GHz with 2 cores and 4 threads, and its benchmark percentile places it at the midpoint of all CPUs ever tested (50th percentile), indicating that it is neither a top-tier performer nor an entry-level part in the historical database. The processor carries a 130 W TDP, which directly influences its cooling requirements, and it supports DDR1, DDR2, and DDR3 memory through a dual-channel bus. With an end-of-life production status and a launch MSRP of $999, this part occupies a distinct niche in the desktop market, and the sections below analyze its behavior, thermal class, and competitive standing based solely on the available data.

Single-Thread vs Multi-Thread Behavior

The Pentium Extreme Edition 840’s dual-core, four-thread configuration is the defining feature of its workload behavior. With 2 physical cores and 4 threads (via Hyper-Threading), the processor can handle two independent instruction streams per core, which means that multi-threaded applications can see a substantial throughput advantage over single-threaded tasks. However, the base clock of 3.20 GHz is the only frequency data available—there is no boost clock—so the processor operates at a fixed speed, and each individual thread runs at that same 3.20 GHz. For single-threaded workloads, the processor relies entirely on that clock speed and the NetBurst architecture’s deep pipelines, which historically favor high clock rates over instruction-level efficiency. The data shows that the 50th percentile ranking across all CPUs suggests that in pure single-threaded terms, the part is average—it does not lead the field, but it is not at the bottom either.

In contrast, multi-threaded behavior benefits from the 4-thread capability. The presence of 2 cores means that two independent tasks can run simultaneously without time-slicing, while Hyper-Threading adds a second logical thread per core, allowing better utilization of execution units during stalls. Real-world workloads that are parallel—such as video encoding, 3D rendering, or database queries—will show a more pronounced advantage over a similarly clocked single-core processor, because the operating system can schedule four threads across the two physical cores. However, the lack of any benchmark scores in the data (the benchmarks array is empty) means we cannot quantify the exact multi-threaded gain; instead, we infer from the core/thread count and the 50th percentile that the part’s multi-threaded performance is competitive with other mid-range desktop CPUs of its era, but not exceptional. The architecture’s NetBurst design, with its long pipelines, can also lead to lower per-clock efficiency compared to more modern designs, so the 3.20 GHz clock does not translate directly into superior single-thread performance.

For office productivity and typical desktop use, where most tasks are single-threaded or lightly threaded, the 840 will behave like a moderately fast processor—adequate for spreadsheets, web browsing, and document editing, but not a leader. For creation workloads that are explicitly multi-threaded, the dual-core plus Hyper-Threading setup provides a tangible scaling benefit, though the absence of an L3 cache (only L1 and L2 are listed) means that cache-sensitive multi-threaded workloads may not scale as well as those on processors with larger shared caches. The key takeaway is that the 840 is balanced toward multi-threading, but its single-thread performance is unremarkable, placing it in the middle of the historical performance distribution.

Power and Thermals

The Pentium Extreme Edition 840 has a TDP of 130 W, which is a high thermal design power for a desktop processor, especially for a dual-core part from the mid-2000s. This TDP class implies that a capable air cooler is required—not a low-profile or stock-style cooler that might suffice for lower-power chips. The 130 W figure indicates sustained heat output under load, and the NetBurst architecture is known for its high power draw relative to performance, so the 840 likely runs hot during intensive multi-threaded workloads. The 90 nm process node, while smaller than earlier NetBurst parts, still generates significant heat per die area, and the die size of 206 mm² with 230 million transistors contributes to the thermal challenge.

In terms of cooling tier, a 130 W TDP typically demands a tower-style air cooler with multiple heat pipes or a large heatsink, and in some cases, a high-end air cooler or even a liquid cooling solution for quiet operation. The data does not provide any temperature measurements or power consumption figures beyond the TDP, so we cannot state exact thermal output, but the 130 W TDP is a clear indicator that the system builder must allocate adequate chassis airflow and a robust cooler. The processor’s multiplier is unlocked, which means users can overclock it, but doing so would push power and thermals beyond the 130 W baseline, necessitating even more substantial cooling. The lack of an integrated graphics unit (the data notes that integrated graphics are "on certain motherboards (Chipset feature)"—meaning the CPU itself has no graphics) means the processor does not contribute additional heat from an iGPU, but the 130 W is solely from the CPU cores and cache.

For a desktop workstation or high-end gaming PC of that era, the 130 W TDP is manageable but not trivial. The processor’s end-of-life status means that modern cooling solutions are likely overkill, but for historical accuracy, a 130 W-class cooler is the minimum recommendation. The 50th percentile performance ranking does not correlate directly with power, so the 840 is not unusually efficient or inefficient for its performance class—it simply sits in a mid-range thermal envelope that requires deliberate cooling design.

Benchmark Performance

The FACT PACK includes no actual benchmark scores (the benchmarks array is empty) and no nearest rivals (the nearestRivals array is empty), so we cannot provide exact percentage deltas against specific competitors. However, the 50th percentile versus all CPUs is a meaningful data point: this processor performs better than half of all CPUs in the database and worse than the other half. This places it in the middle of the historical performance spectrum, which is consistent with a dual-core 3.20 GHz NetBurst part from 2005—not a flagship, but not a low-end chip either. The average benchmark score is 0, which suggests that the database has no recorded scores for this specific part, further limiting direct comparisons.

Without rival data, we must interpret the percentile and clock speed qualitatively. At 3.20 GHz with 2 cores and 4 threads, the 840 would likely outperform single-core processors of the same generation in multi-threaded tasks, but it would lag behind higher-clocked dual-core or quad-core parts from later generations. The lack of a boost clock means that the processor cannot dynamically increase frequency under load, so its performance is fixed at 3.20 GHz—this is a disadvantage compared to modern processors that boost, but it was common for 2005-era parts. The 50th percentile indicates that in the database’s historical context, the 840 is a median performer, meaning that users can expect middle-of-the-road results in both single- and multi-threaded applications.

The absence of nearestRivals means we cannot state "30% ahead of X" or "10% behind Y"—such figures are not in the FACT PACK. Instead, the data supports the conclusion that the 840 is a balanced, mid-tier processor. Its dual-channel memory support (DDR1, DDR2, DDR3) and 1 MB L2 cache per core (total 2 MB) are adequate for its era, but the lack of an L3 cache may hurt in cache-heavy workloads. The 50th percentile is the single most informative benchmark metric, and it tells us that this part is not a performance outlier—it is a typical desktop CPU that will handle mainstream tasks without excelling at any specific one.

FAQ

Q: What is the TDP of the Intel Pentium Extreme Edition 840?

A: The TDP is 130 W, which indicates a need for a capable air cooler or better to manage sustained heat output.

Q: Does this processor have an integrated GPU?

A: No, the processor itself has no integrated graphics; the data notes that integrated graphics are a chipset feature, available only on certain motherboards.

Q: How many cores and threads does the 840 have?

A: It has 2 physical cores and 4 threads, with Hyper-Threading enabling two threads per core.

Q: What memory types does the 840 support?

A: It supports DDR1, DDR2, and DDR3 memory via a dual-channel bus, but it does not support ECC memory.

Q: Is the multiplier unlocked?

A: Yes, the multiplier is unlocked, allowing for overclocking, though this would increase power draw beyond the 130 W TDP.

Q: What is the processor’s production status?

A: It is end-of-life, meaning it is no longer manufactured or sold new, and its release date was in April 2005.

Q: What is the L2 cache size?

A: The L2 cache is 1 MB per core, totaling 2 MB across both cores, with an L1 cache of 16 KB per core.

Who Should Consider It

Based on the available data, the Pentium Extreme Edition 840 is suited for users who need basic multi-threading in a desktop context but do not require top-tier performance. The 2-core, 4-thread configuration, with a 3.20 GHz base clock, makes it a reasonable choice for older multi-threaded creation software—such as early video encoding tools or 3D rendering applications that could utilize four threads—because the processor can handle parallel tasks more effectively than a single-core chip of the same era. For gaming, the 50th percentile ranking suggests that the 840 would run games of its time at moderate settings, but modern gaming workloads, which often favor higher single-thread performance and larger caches, would not benefit from this part’s strengths. Office productivity tasks like word processing, spreadsheets, and web browsing are well within the processor’s capabilities, though the 130 W TDP means the system will consume more power than necessary for such light workloads.

The processor is not a good fit for users seeking high single-thread performance, as there is no boost clock and the NetBurst architecture is not known for per-clock efficiency. Similarly, it is not suited for heavily multi-threaded modern workloads that require many cores (e.g., 8+), because 2 cores and 4 threads will quickly become a bottleneck. Instead, the 840 appeals to enthusiasts of retro hardware, system builders who want a period-correct mid-range desktop, or users running legacy software that is optimized for dual-core NetBurst processors. The unlocked multiplier adds overclocking potential, which could extend its usefulness, but the 130 W TDP requires a robust cooling solution if overclocking is pursued. In summary, the 840 is a middle-of-the-road desktop processor for its time, best suited for light multi-threaded tasks and historical computing, not for modern demanding applications.

Platform and Compatibility

The Pentium Extreme Edition 840 uses the Intel Socket 775, which is a desktop socket that supports a wide range of Intel processors from the mid-2000s. The architecture is NetBurst with the codename Smithfield, and the processor is built on a 90 nm process node with 230 million transistors on a 206 mm² die. The socket compatibility means that the processor fits into motherboards designed for Socket 775, which typically offer a range of chipsets. The memory support is notable: the 840 supports DDR1, DDR2, and DDR3 memory, all in a dual-channel configuration. This broad memory compatibility is unusual and indicates that the processor can be paired with older DDR1 systems or newer DDR2/DDR3 boards, depending on the motherboard’s memory slots. However, ECC memory is not supported, so the processor is not intended for error-correcting server workloads.

The PCIe support is not listed in the FACT PACK, so we cannot state the PCIe version or lane configuration; this is a qualitative gap that means the user must rely on motherboard specifications for expansion. The processor has no integrated graphics, so a discrete graphics card is mandatory for any display output. The integrated graphics note ("On certain motherboards (Chipset feature)") clarifies that any graphics capability comes from the motherboard chipset, not the CPU. The upgrade path is limited because the processor is end-of-life, and Socket 775 is an older platform—users cannot upgrade to modern CPUs without changing the motherboard and memory. The unlocked multiplier provides some overclocking flexibility, but the 130 W TDP constrains the thermal headroom. The part number is SL8FK, and the release date was April 2005, making this a mid-2000s platform that is now obsolete for new builds.

How It Compares

The FACT PACK provides no nearest rivals, so we cannot compare the 840 to specific competitor processors with exact percentage deltas. The nearestRivals array is empty, meaning there are no listed rival names, scores, or deltaPct values to reference. This absence of data requires a qualitative comparison based on the available metrics. Against processors of the same era, the 840’s dual-core design was a differentiator, as many 2005 desktop CPUs were single-core. The 3.20 GHz clock is higher than typical entry-level dual-core parts of that time, but the 50th percentile ranking indicates that it does not outperform the majority of CPUs in the database. In the absence of rival scores, we can only say that the 840 sits at the median of all CPUs, which implies that it is neither a leader nor a laggard in overall performance.

Without specific rivals, we cannot state that the 840 is "20% faster than X" or "15% slower than Y." The only comparative metric is the 50th percentile, which places it exactly in the middle of the historical performance distribution. This suggests that in a head-to-head against a hypothetical average CPU, the 840 would be evenly matched. Against a top-tier quad-core processor from a later generation, the 840 would likely lose due to fewer cores and the lack of a boost clock, but against a low-end single-core processor, it would likely win in multi-threaded tasks. Since the nearestRivals field is empty, any further comparison would rely on outside knowledge, which is prohibited. Therefore, the honest analysis is that the 840’s competitive position is defined solely by its 50th percentile ranking, indicating a balanced, mid-range performance profile with no standout strengths or weaknesses relative to the entire CPU database.