Intel Pentium 4 HT 640

The Intel Pentium 4 HT 640 is a Desktop processor from Intel, built on the 90 nm NetBurst/Prescott generation and released on 2005-02-19. It carries part number SL7Z8 and is listed as end-of-life. The fact pack records no series grouping, no nearest rivals, and an empty benchmarks array; the only aggregate metric is percentileVsAllCpus = 50, and the avgBenchmarkScore is 0. This profile therefore interprets the structural and platform data rather than synthetic scores.

Single-Thread vs Multi-Thread Behavior

The Pentium 4 HT 640 has 1 core and 2 threads, with a base clock of 3.20 GHz and no boost clock listed. That makes the 3.20 GHz base frequency the upper frequency boundary in the data. For single-threaded workloads, the processor presents one execution core running at that fixed reference clock. There is no higher turbo-style state to fall back on, so the workload is tied to the 3.20 GHz figure plus the cache hierarchy. The L1 cache is 28 KB and the L2 cache is 2 MB, with no L3 cache listed.

The 2-thread portion of the specification means the operating system can schedule two logical threads, but both threads share the same single physical core. This is not a 2-core arrangement. Multi-threaded work in this configuration is limited to interleaving two instruction streams on one execution pipeline, which can improve utilization when one thread stalls on memory or other resources, but it does not double throughput the way a second physical core would. The data lists the architecture as NetBurst and the codename as Prescott, two facts that define the design generation. The generation is listed as Pentium 4 HT (Prescott).

For real workloads, the split is straightforward: single-threaded code sees one 3.20 GHz core with 2 MB of L2 cache, while code that can split into two threads can occupy both logical threads but must share the resources of that single core. The dual-channel memory bus is a separate trait and does not alter the 1-core/2-thread execution model. No memory bandwidth figure is provided, so the practical effect of dual-channel support cannot be quantified from the data.

Who Should Consider It

The only performance-class ranking supplied is percentileVsAllCpus = 50, placing this processor exactly at the midpoint of the database’s CPU distribution. That position is neither a bottom-tier nor a top-tier signal; it is a neutral placement. The absence of benchmark scores means workload recommendations have to be drawn from the core, thread, clock, and memory specifications.

For gaming, the data shows 1 core and 2 threads. A workload that needs more than 2 threads is outside what this processor can present to the OS. The 3.20 GHz clock and 2 MB L2 cache are the positive specifications, but the thread ceiling is the limiting factor.

For creation work, the same 2-thread ceiling applies. Lightly threaded tasks could run on the 3.20 GHz core and benefit from the 2 MB L2 cache, but heavily threaded rendering or encoding workloads would need more hardware threads than this processor lists. The fact pack contains no creation-oriented benchmark score, so no stronger claim can be made.

For office and productivity use, the relevant facts are the 3.20 GHz base clock, 2 MB L2 cache, dual-channel memory support, and the listed memory types DDR1, DDR2, and DDR3. ECC memory is not supported, which is a compatibility consideration for environments that require ECC. The market segment is Desktop and the production status is end-of-life, so the intended context is a legacy desktop platform rather than a new system build.

Benchmark Performance

The benchmarks array for this processor is empty. The avgBenchmarkScore is 0, and the nearestRivals list is empty. Because of those three facts, there are no benchmark scores to quote, no percentage deltas to report, and no rival score comparisons to make. The only quantitative aggregate data is percentileVsAllCpus = 50, which indicates a midpoint placement in the tracked CPU population. Since avgBenchmarkScore is 0 and no individual benchmark entries exist, that percentile cannot be validated against raw sample scores.

This is a meaningful data limitation. Statements such as “ahead of X in single-thread” or “30% behind Y in multi-core” cannot be produced, because the fact pack does not contain any such numbers. The absence of nearestRivals also means there are no deltaPct values to work from. Benchmark behavior, in this case, is best summarized as unspecified by the available data, with the midpoint percentile providing only a coarse positional reference.

How It Compares

The nearestRivals list in the fact pack is empty. A comparison against a specific rival requires a rival name, a score, a deltaPct, and usually a rank context. None of those entries are present for the Pentium 4 HT 640. There is no nearest rival to place in a paragraph, and no percentage delta can be calculated. The only comparable position signal in the entire profile is percentileVsAllCpus = 50, which is already noted above. The correct reading of this section is that the database has no recorded rival relationships for this processor, so a positional comparison cannot be constructed from this fact pack.

Power and Thermals

The processor has a TDP of 84 W. That TDP figure is the only thermal envelope number in the data. The chip is built on a 90 nm process, with 169 million transistors on a 109 mm² die. In the context of a Desktop Socket 775 processor, an 84 W TDP class is in the range of conventional active cooling solutions; the data does not specify a cooler, but 84 W does not imply a specialized or exotic cooling tier. The 3.20 GHz base clock is the reference frequency for this thermal specification, since no boost clock is listed. The process node, transistor count, and die size are all raw manufacturing facts, while the TDP is the thermal design point that a motherboard VRM and cooling solution must accommodate. The production status is end-of-life, so the data does not describe a current cooling bundle or ongoing thermal validation.

FAQ

Q: What socket does the Intel Pentium 4 HT 640 use?

A: It uses Intel Socket 775.

Q: What cache does it have?

A: It has 28 KB of L1 cache and 2 MB of L2 cache; no L3 cache is listed.

Q: What memory types are supported?

A: It supports DDR1, DDR2, and DDR3 on a dual-channel memory bus. ECC memory is not supported.

Q: Does the processor include integrated graphics?

A: The integrated graphics field is listed as “On certain motherboards (Chipset feature),” meaning display output is dependent on the motherboard chipset rather than a processor-side graphics block.

Q: Is the multiplier unlocked?

A: No; multiplierUnlocked is false.

Q: Is the processor still in production?

A: No; the production status is end-of-life.

Platform and Compatibility

The Pentium 4 HT 640 is tied to Intel Socket 775 and uses PCIe Gen 2. The memory support list is broad: DDR1, DDR2, and DDR3, all running over a dual-channel bus, with ECC memory disabled. No memory bandwidth figure is included in the data, so the capacity of that dual-channel configuration cannot be quantified here. The integrated graphics situation is chipset-dependent, appearing only on certain motherboards as a chipset feature. The processor was released on 2005-02-19 and carries the part number SL7Z8.

The multiplier is not unlocked, which appears in the data as multiplierUnlocked = false. The production status is end-of-life, and the fact pack lists no upgrade path, no compatible successors, and no nearest rivals. The platform story is therefore a fixed Socket 775 desktop setup with broad memory type support, PCIe Gen 2 connectivity, and no listed forward upgrade path in the database.