Intel Pentium 4 1.5

The Intel Pentium 4 1.5 is a foundational desktop processor, representing the introductory tier of the NetBurst architecture. With a single core and a base clock of 1500.00 MHz, this chip is positioned at the very entry level of its generation. It is a historical part, now end-of-life, that offers a baseline reference point for early 2000s computing performance.

Who Should Consider It

The Intel Pentium 4 1.5 is not a processor for modern demanding workloads. Its single core and single thread configuration, combined with a 256 KB L2 cache and 8 KB L1 cache, place it firmly in the category of basic, single-tasking operations. Benchmark data shows it holds the 50th percentile against all CPUs, indicating that half of all recorded processors outperform it and half do not, making it a strictly average performer in the historical database.

For office and productivity tasks, this chip is suitable only for the most rudimentary operations, such as word processing or simple spreadsheet data entry, where the software does not leverage multiple threads. The data suggests that any modern multitasking environment, where the operating system and background processes compete for the single available thread, would overwhelm this processor's capabilities. The lack of a boost clock further limits its ability to handle transient spikes in processing demand.

Gaming is not a viable use case for this processor. The single-threaded performance, while the sole metric that matters for this chip, is insufficient for any 3D title from its era that required significant geometry processing. The absence of any integrated graphics on the CPU itself—relying instead on a "chipset feature" for display output—means the system would require a discrete graphics card, but the CPU would still become the bottleneck due to its low clock speed and limited cache.

For content creation, the Pentium 4 1.5 is categorically unsuitable. Video encoding, 3D rendering, and large-scale image editing are inherently parallel tasks that can utilize multiple cores and threads. With only one of each, this processor would see utilization rates at 100% on a single core while the rest of the system waits, resulting in extremely poor performance. The 180 nm process node and 58 W TDP place it in a thermal class that is easily managed, but that does not translate into computational capability.

The primary audience for this CPU is a collector or a hobbyist building a period-correct system for retro computing. For someone seeking to run legacy 32-bit software that is not multi-threaded and does not require significant memory bandwidth (DDR1 or DDR2 support only), this processor can function as an authentic piece of hardware history. Its production status is end-of-life, confirming that it is a legacy product with no relevance to current system builders.

Power and Thermals

The Intel Pentium 4 1.5 carries a thermal design power (TDP) of 58 W. This figure places it in a modest power consumption class, especially when compared to later NetBurst processors which were known for significantly higher thermal output. The 58 W TDP implies that a basic, stock cooler designed for Socket 478 would be sufficient to maintain operational temperatures under full load.

The processor is manufactured on a 180 nm process node, which is relatively large by modern standards but was standard for its release period in 2001. This process, combined with a die size of 217 mm² and 42 million transistors, dictates the thermal characteristics. The power density is low enough that cooling requirements are not stringent. A capable air cooler with a standard 80mm fan would be more than adequate to handle the thermal load.

Given the 58 W TDP, this is not a processor that demands advanced liquid cooling or high-end thermal solutions. The heat generated is manageable with simple heatsink and fan assemblies. However, due to the end-of-life status, the original cooling solution may no longer be functional, so a modern low-profile cooler compatible with Socket 478 would be a practical replacement. The data indicates that thermals should not be a primary concern for anyone integrating this processor into a system, provided basic airflow exists within the chassis.

How It Compares

The FACT PACK lists no nearest rivals for the Intel Pentium 4 1.5. Consequently, there are no direct comparative scores, deltaPct values, or rival names to analyze. The benchmark results show an average benchmark score of 0, with no comparative data points available for a relative performance assessment.

In the absence of peer comparisons, the processor's position can only be understood through its absolute specifications. The single core at 1500.00 MHz is the defining characteristic. Without rival data, statements about being "ahead of" or "behind" a specific competitor cannot be made. The percentile rank of 50% against all CPUs is the sole positional metric, indicating a median historical performance level.

This lack of rival data suggests that the Pentium 4 1.5 occupied a unique or isolated performance tier at the time of its release. It was the entry point for the Pentium 4 family, and its immediate competitors may have been the previous-generation Pentium III or early Athlon models, but those are not listed in the provided data. As such, any analysis must remain strictly within the bounds of its own specification sheet and the global percentile ranking.

FAQ

Q: What is the base clock speed of the Intel Pentium 4 1.5?

A: The base clock speed is 1500.00 MHz, with no boost clock available, meaning the processor operates at this fixed frequency.

Q: Does this processor support ECC memory?

A: No, the FACT PACK indicates that ECC memory is false, so only non-ECC memory modules are supported.

Q: What is the manufacturing process node for this chip?

A: The Intel Pentium 4 1.5 is built on a 180 nm process node, which is a key factor in its 58 W TDP.

Q: Is the multiplier unlocked for overclocking?

A: No, the multiplier is not unlocked, which restricts overclocking capabilities to adjusting the front-side bus only.

Q: What is the thermal design power (TDP) of this processor?

A: The TDP is rated at 58 W, which indicates a modest cooling requirement suitable for a standard air cooler.

Q: What is the transistor count and die size?

A: The processor contains 42 million transistors on a die size of 217 mm².

Platform and Compatibility

The Intel Pentium 4 1.5 is designed for the Intel Socket 478 platform. This socket is specific to the NetBurst architecture generation, and the processor is not physically compatible with other socket types. The architecture is NetBurst, with the codename "Willamette," which represents the first iteration of this microarchitecture.

Memory support is limited to DDR1 and DDR2 standards. There is no specified memory bus width or bandwidth in the data, but the support for both DDR generations indicates a flexible memory controller that can interface with either type of module, depending on the motherboard's implementation. ECC memory is not supported, which is typical for a desktop segment processor.

The processor does not have integrated graphics on the CPU die. Display output is dependent on a "chipset feature," meaning the motherboard's chipset must provide the graphics capability for any video output. This is a critical consideration for system assembly, as a discrete graphics card is technically optional only if the motherboard includes an integrated GPU.

PCIe support is not listed, which is consistent with its release era; the platform would have utilized AGP or PCI slots for expansion cards. The upgrade path is inherently limited by the end-of-life production status. The only potential upgrade within the same socket would be a higher-clocked Pentium 4 Willamette or later Northwood model, but no such models are listed in the data. The part numbers SL5TJSL5N8SL59VSL6BASL62YSL5UF identify specific stepping versions of this chip. The release date of 2001-08-26 marks the initial availability for this desktop processor.