Intel Pentium 4 HT 551

The Intel Pentium 4 HT 551 is a desktop processor manufactured by Intel on a 90 nm process, containing 125 million transistors on a 109 mm² die. It is based on the NetBurst architecture under the Prescott codename, and the generation field identifies it as Pentium 4 HT (Prescott). The CPU has 1 core and 2 threads, a base clock of 3.40 GHz, and a cache hierarchy of 16 KB L1 and 1 MB L2. The part number is SL8J5, the release date is 2005-06-11, and the production status is end-of-life.

Platform and Compatibility

The processor is built for Intel Socket 775, which is the only socket listed in the fact pack. Memory support is recorded as DDR1, DDR2, and DDR3 over a dual-channel memory bus, though no memory bandwidth figure is provided. The absence of a memory bandwidth number means the practical throughput of those memory generations cannot be quantified from this profile. ECC memory is not supported, so configurations requiring error-correcting memory are excluded by the data.

The PCIe interface is Gen 2, but the fact pack does not specify a lane count. Consequently, expansion bandwidth is not defined beyond the interface generation. Integrated graphics is listed as “On certain motherboards (Chipset feature)”, meaning the processor package itself does not carry an integrated graphics block in the recorded specification; graphics capability depends on the motherboard chipset rather than on the CPU. The multiplier is not unlocked, and no boost clock is recorded, so the 3.40 GHz base clock is the only frequency point in the data.

The thermal design power is 115 W, which is a platform constraint for power delivery and cooling. The market segment is Desktop, and the production status is end-of-life. No series grouping is assigned in the fact pack, and no other compatible processors are listed, so the upgrade path is not documented beyond the Socket 775 and memory support already stated. The combination of Socket 775, DDR1/DDR2/DDR3 memory support, and PCIe Gen 2 defines the platform context, but without a list of compatible boards or processors, further platform expansion cannot be established from this data alone.

Who Should Consider It

The fact pack contains no benchmark scores, so any recommendation must be grounded in the physical and logical configuration rather than in measured application results. The CPU records 1 core and 2 threads, a 3.40 GHz base clock, 16 KB L1 cache, and 1 MB L2 cache. That configuration is most closely aligned with workloads that rely on a single thread and can also use a second logical thread for background or auxiliary scheduling. It is not a high-core-count part; the data explicitly records only 1 physical core, so workloads that require many physical cores have no support in this specification.

Because the benchmarks array is empty and the average benchmark score is 0, there is no score-based evidence for gaming, content-creation, or office productivity performance. A user considering this processor for gaming cannot be directed by any benchmark result in this profile. Likewise, creation workloads that scale across multiple cores cannot be evaluated because the part has 1 core and because no creation benchmark appears in the data. Office-style workloads are a plausible fit for a 1-core, 2-thread processor, but the fact pack has no office score to confirm that expectation.

The 50th-percentile rank against all CPUs is the only comparative signal in the data. It places the processor at the median of the database’s CPU distribution, which is a broad positional statement rather than a workload-specific measurement. For a user already on a Socket 775 platform with DDR1/DDR2/DDR3 memory and a PCIe Gen 2 motherboard, this processor could be considered if the workload profile is limited to a single core with an additional logical thread. For anyone expecting multicore performance or measured gaming and creation scores, the data provides no basis for such an expectation.

Benchmark Performance

The benchmark data for this processor is entirely absent. The benchmarks field is an empty array, and the average benchmark score is 0. That zero is not a measured performance result; it is the value recorded when no benchmark samples exist. The fact pack also lists no nearest rivals, so there are no deltaPct values and no comparative scores against any named processor.

The only quantitative comparative field is percentileVsAllCpus, which is 50. This places the processor at the median of the database’s all-CPU distribution. A median position is a rank, not a benchmark outcome. It does not indicate success or failure in any application, nor does it identify any rival that the processor beats or loses to. Because there are no scores in the benchmarks array, no throughput, latency, or efficiency conclusion can be drawn from the fact pack. The 3.40 GHz base clock and 1 MB L2 cache are configuration facts, not performance measurements, and they cannot substitute for missing benchmark samples.

In short, the data permits only two statements about benchmark performance: there are no collected benchmark scores, and the all-CPU percentile is 50. Any attempt to say that this processor performs at a particular level relative to a rival would require values that are not present in the fact pack.

How It Compares

The nearestRivals field is empty. There are no rival names, no rival scores, and no deltaPct percentages in the data. As a result, no head-to-head comparison with any specific processor can be written. The absence of nearest rivals means the normal comparative language used in benchmark analysis — such as a percentage lead or deficit against a named part — cannot be applied here.

The only comparative value is percentileVsAllCpus = 50. This is an aggregate rank against all CPUs in the database, not a comparison with a single competitor. It cannot be used to say that this processor is ahead of one model or behind another, because the identities of those models are not provided. In the absence of nearestRivals, the Pentium 4 HT 551 has no documented rival positions. The comparison section is therefore limited to the observation that the data contains no rival objects and one all-CPU percentile value.

Single-Thread vs Multi-Thread Behavior

The processor’s core topology is straightforward: 1 core and 2 threads. The HT designation in the product name is consistent with the 2-thread count, and the fact pack records no additional physical cores. This means the processor offers one set of physical execution resources, with an extra logical thread available to software.

In a single-thread workload, the one core can operate at the listed 3.40 GHz base clock, with 16 KB of L1 cache and 1 MB of L2 cache available. No boost clock is recorded, so the frequency ceiling in the data is the base clock itself. The locked multiplier reinforces that the processor does not provide frequency scaling via multiplier changes in the recorded specification. A single-threaded application that fits within the 1 MB L2 cache has a relatively large cache footprint for a single core, but the fact pack does not include any score that measures the benefit of that cache.

In a multi-thread workload, the two logical threads share the same physical core. The fact pack does not provide separate single-thread and multi-thread scores, so the scaling benefit of the second thread is unknown. What can be said from the data is that the second thread does not add a second physical core, a second L1 cache, or a second L2 cache. The cache hierarchy listed is 16 KB L1 and 1 MB L2, and since there is only 1 core, those caches are the caches of that single core. The real-world split between single-thread and multi-thread performance is therefore dominated by the 1-core, 2-thread design, but its magnitude is not quantified anywhere in the fact pack.