Intel Mobile Pentium 4 HT 2.66

The Intel Mobile Pentium 4 HT 2.66 is a single-core, dual-thread mobile processor built on Intel's NetBurst architecture with the Northwood core. It ranks at the 50th percentile in the database — the exact median of all tracked CPUs — with no recorded benchmark scores. The specification profile, a 2.67 GHz base clock, 512 KB L2 cache, and 66 W TDP, defines a processor positioned in the middle of the mobile performance spectrum at its September 22, 2003 release.

Benchmark Performance

The database places the Mobile Pentium 4 HT 2.66 at the 50th percentile across all CPUs. This is a median position: exactly half of the processors tracked rank above it and half below. The average benchmark score is listed as 0, meaning no direct performance measurements have been logged for this specific part. The percentile ranking is therefore derived from its specification profile rather than from measured workloads.

The performance envelope is defined by a single physical core running at 2.67 GHz, with Hyper-Threading providing a second logical thread. The NetBurst architecture, implemented through the Northwood core, relies on high clock speeds and deep pipelines to drive performance. The cache hierarchy — 8 KB L1 and 512 KB L2 — is modest by modern standards but was characteristic of the Northwood generation. The 130 nm process node, 55 million transistors, and 131 mm² die size place this processor in the mid-range of the Northwood family's physical characteristics.

The 50th percentile ranking is the only quantitative performance anchor available. It indicates a mainstream position: not a standout performer, not a laggard. For a mobile part from 2003, this placement reflects a processor that was offered as a mid-tier option rather than a flagship. The single-core design with dual threads caps its ceiling in modern multi-threaded workloads, but the 2.67 GHz clock rate provides a workable baseline for single-threaded tasks. The absence of measured benchmark scores means there are no recorded deltas to report against other processors; the percentile is the sole comparative metric.

Who Should Consider It

The workload profile of this processor is shaped by its single-core, dual-thread design. Office productivity — word processing, spreadsheets, email, and light web browsing — falls well within its capabilities. The 2.67 GHz clock rate provides adequate responsiveness for these interactive tasks, and Hyper-Threading allows the operating system to schedule background work alongside foreground applications.

For gaming, this processor belongs to the era of its 2003 release. Games from that period, designed for single-core processors, would run acceptably. The 512 KB L2 cache helps with the working sets of older game engines. Modern titles that require multiple physical cores are not appropriate for this processor; the single core would become a bottleneck in any game that offloads physics, AI, or streaming to additional threads.

Content creation is a mixed case. Single-threaded tasks such as photo editing in older software, basic audio processing, and light scripting would function. The 2.67 GHz clock drives single-threaded performance. However, video encoding, 3D rendering, and modern creative suites that scale across cores would be constrained by the single physical core. Hyper-Threading provides a second logical thread that can improve throughput on some parallel workloads, but the improvement is limited because both threads share the same execution resources.

The mobile market segment designation means this processor was designed for laptops and portable systems. Users maintaining legacy mobile platforms on Socket 478 who require Hyper-Threading support would find this a compatible processor. The end-of-life production status means it is only available through used or refurbished channels. The DDR1 and DDR2 memory support gives system builders flexibility in memory selection, though the lack of ECC support rules out error-correcting memory configurations.

Power and Thermals

The 66 W TDP places this processor in a moderate power class for a mobile part. In the context of mobile computing, 66 W is a significant thermal load, reflecting the NetBurst architecture's tendency toward high power consumption. The 130 nm process node, with 55 million transistors on a 131 mm² die, contributes to this power profile. The relationship between the 2.67 GHz clock rate and the 66 W TDP shows the NetBurst design philosophy: high clock speeds achieved at the cost of power efficiency.

Cooling for this processor requires an active solution. A heat pipe assembly with a fan, typical of laptops from the mid-2000s, is the appropriate tier. Passive cooling would not be sufficient under sustained load given the 66 W TDP. The thermal solution must dissipate heat across the 131 mm² die surface, and the 130 nm process node's heat density is a factor in the cooling requirement. In a mobile form factor, the 66 W TDP has implications for battery life and system thermals; the laptop chassis must provide adequate airflow to maintain stable operation.

FAQ

Q: What socket does the Intel Mobile Pentium 4 HT 2.66 use?

A: It uses the Intel Socket 478 interface.

Q: How many cores and threads does this processor have?

A: It has 1 physical core and 2 threads. The second thread is provided by Hyper-Threading technology.

Q: What memory types does it support?

A: It supports DDR1 and DDR2 memory. It does not support ECC memory.

Q: What is the TDP of this processor?

A: The TDP is 66 W.

Q: Does it have integrated graphics?

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

Q: What is the production status and release date?

A: The production status is end-of-life. The release date was September 22, 2003, and the part number is SL77M.

How It Compares

The database lists no nearest rivals for this processor. This means there are no recorded comparative scores against specific competing parts. The only positional reference is the 50th percentile ranking, which places the processor at the exact midpoint of the database's CPU population. The absence of rival data is itself a finding: the Mobile Pentium 4 HT 2.66 occupies a position where no direct competitive benchmarks have been established.

Without rival scores, comparison must be drawn from the specification profile. The single-core, dual-thread configuration with a 2.67 GHz clock and 512 KB L2 cache defines the performance envelope. The 66 W TDP and 130 nm process node place it within the power and thermal characteristics of its generation. The Socket 478 interface ties it to a specific platform era, and the DDR1/DDR2 memory support indicates the memory technology transition period of the mid-2000s.

The 50th percentile ranking provides a comparative anchor against the broader database population. This processor is not a top performer, nor is it a bottom-tier part. It sits in the middle of the distribution, which for a mobile NetBurst processor from 2003 reflects a mainstream positioning. The absence of measured benchmark scores means the percentile ranking is the only quantitative comparison available.

Platform and Compatibility

The Intel Mobile Pentium 4 HT 2.66 uses the Intel Socket 478 interface, a socket used across Intel's desktop and mobile platforms during the NetBurst era. The processor is built on the Northwood core, part of the NetBurst architecture, and manufactured on a 130 nm process with 55 million transistors on a 131 mm² die. The part number is SL77M.

Memory support includes DDR1 and DDR2, reflecting the transition between these memory standards. ECC memory is not supported, which limits the processor's suitability for error-sensitive server or workstation workloads. The memory bus specifications are not listed in the database, so no bandwidth figures are available. The processor does not have an unlocked multiplier, meaning overclocking through multiplier adjustment is not possible.

The integrated graphics capability is noted as a chipset feature available on certain motherboards, not as a processor-integrated GPU. Systems using this processor would rely on a separate graphics solution unless the motherboard provides integrated graphics through its chipset. PCIe support is not listed in the database, suggesting this processor predates or does not include native PCIe connectivity. The upgrade path is limited by the end-of-life production status and the Socket 478 platform, which has been superseded in the mobile market.

Single-Thread vs Multi-Thread Behavior

The processor has 1 physical core and 2 threads, with Hyper-Threading providing the second logical thread. In single-threaded workloads, the full 2.67 GHz clock rate is available to the single thread. The 512 KB L2 cache and 8 KB L1 cache provide the data path for that thread. The NetBurst architecture's deep pipeline design favors high clock speeds, which benefits single-threaded performance.

In multi-threaded workloads, Hyper-Threading allows the processor to execute two threads simultaneously on the single core. The benefit is that pipeline stalls in one thread can be filled with work from the other thread. However, the two threads share the same execution units, the same 8 KB L1 cache, and the same 512 KB L2 cache. This means the improvement from the second logical thread is modest compared to a true second physical core.

The split between single-thread and multi-thread behavior has real implications for workloads. Applications that are primarily single-threaded — older games, many office applications, and some scripting workloads — will see performance driven by the 2.67 GHz clock. Applications that can use multiple threads — modern browsers, video encoders, and compilation tools — will see some benefit from Hyper-Threading, but the single physical core remains the limiting factor. The 50th percentile position in the database reflects this balance: adequate for single-threaded tasks, constrained in multi-threaded scenarios.