Intel Pentium D 925

The Intel Pentium D 925 is a desktop processor built on Intel's NetBurst architecture, specifically the Presler codename. It features 2 physical cores and 2 threads, running at a fixed base clock of 3.00 GHz with no boost clock. The part is manufactured on a 65 nm process node at Intel's foundry, containing 376 million transistors across a dual-die configuration with a die size of 2x 81 mm². Released on 2006-09-30 with a launch MSRP of $74, it is now end-of-life. The database records no benchmark scores for this unit (avgBenchmarkScore is 0), but its percentileVsAllCpus field places it at the 50th percentile, indicating a median position within the tracked CPU population.

Benchmark Performance

Benchmark results for the Pentium D 925 are absent from the database. The avgBenchmarkScore field is 0, and the nearestRivals array is empty, so no direct percentage deltas against other processors can be computed from this data set. The only performance-related metric available is the percentileVsAllCpus value of 50, which places this part exactly at the midpoint of the database's CPU distribution. This suggests that, historically, the Pentium D 925 occupied a middle-tier position rather than a high-end or entry-level slot. The absence of recorded scores means that any quantitative comparison must rely on the architectural parameters provided. The 3.00 GHz base clock is the highest frequency listed for this part, and with 2 cores and 2 threads, the processing capacity is defined by two independent execution units. The 65 nm process node and 376 million transistor count indicate a mature manufacturing step for its generation. Without rival scores, the 50th percentile is the sole benchmark-derived signal, pointing to a processor that was neither a performance leader nor a laggard in the overall CPU landscape. The dual-die design, with each die carrying its own 2 MB of L2 cache, further defines the performance envelope, as the two cores do not share a unified cache. This configuration means that workloads that fit within a single core's 2 MB L2 can operate with minimal external memory traffic, while those exceeding that capacity will rely on the dual-channel memory bus. The lack of any boost clock also means that the processor's performance is entirely static; it cannot temporarily elevate its frequency to handle short bursts of activity. Consequently, the benchmark profile of this part is one of steady, predictable execution rather than variable responsiveness.

Single-Thread vs Multi-Thread Behavior

The Pentium D 925 offers 2 cores and 2 threads, meaning there is no simultaneous multithreading (SMT) support. Each core operates at a base clock of 3.00 GHz, and the processor has no boost clock, so the frequency is constant under load. The cache hierarchy is split per core: each core has 16 KB of L1 cache, and each die carries 2 MB of L2 cache. Since the die size is 2x 81 mm², the processor is a dual-die design, and the L2 caches are per die rather than shared. This means that single-threaded workloads have access to one core with its own 2 MB L2, while multi-threaded workloads can utilize both cores, each with its own L2. The lack of SMT limits multi-threaded scaling to exactly two threads. For applications that are heavily single-threaded, the 3.00 GHz clock provides a fixed execution rate. For multi-threaded tasks, the second core doubles the available execution resources, but the absence of shared cache means inter-core communication relies on the external memory bus. The dual-channel memory bus supports DDR1, DDR2, and DDR3 depending on the motherboard, which influences how quickly data can be fed to the cores. In real-world terms, the single-thread vs multi-thread split is straightforward: two independent cores at 3.00 GHz, each with a private 2 MB L2, and no boost or SMT to complicate the picture. Single-threaded performance is thus entirely dependent on the core's ability to execute instructions at 3.00 GHz, with a 16 KB L1 and 2 MB L2 providing local data storage. Multi-threaded performance, meanwhile, is capped at two concurrent threads, and the per-die cache means that each thread operates within its own cache domain. This design is well-suited for workloads that can be cleanly partitioned into two independent streams, but it struggles with tasks that require frequent data sharing between cores, as that data must traverse the memory bus.

Platform and Compatibility

The Pentium D 925 is designed for the Intel Socket 775 platform. Memory support is flexible but motherboard-dependent, with the processor capable of using DDR1, DDR2, or DDR3 memory modules, depending on the specific board's memory controller implementation. The memory bus is dual-channel, which allows for higher bandwidth when two matching modules are installed. ECC memory is not supported, so the processor is not targeted at error-correcting workloads. Integrated graphics are not present on the CPU itself; however, the fact pack notes that graphics are available "on certain motherboards (Chipset feature)", meaning that the chipset on the motherboard can provide a display output. The processor has a locked multiplier, so overclocking via multiplier adjustment is not possible. The production status is end-of-life, and the release date is 2006-09-30. The part number is SL9D9SL9KA. For upgrade paths, the Socket 775 platform historically supported a range of processors, but the end-of-life status means that new purchases are not possible, and users would be limited to existing boards. The dual-die design with 2x 81 mm² die size and 376 million transistors indicates a specific physical footprint that must be accommodated by the motherboard's socket and power delivery. The memory support across three generations of DDR standards is notable, as it gives system builders flexibility when selecting memory modules, though the motherboard is the ultimate arbiter of which type is accepted. The lack of ECC support further narrows the use case to consumer or non-critical applications. The locked multiplier is a significant constraint for enthusiasts, as it removes the ability to adjust the CPU's clock multiplier to achieve higher frequencies; any overclocking would have to be done through the base clock, which is not a straightforward path given the architecture. The end-of-life status also means that firmware updates or new board compatibility are unlikely, so users must rely on existing hardware.

Who Should Consider It

Given the absence of benchmark scores and the 50th percentile placement, the Pentium D 925 is best considered for workloads that align with its dual-core, dual-thread configuration. For basic office productivity, such as word processing, spreadsheet work, and web browsing, the 3.00 GHz base clock across two cores provides adequate responsiveness for single-threaded applications. The 2 MB L2 per die means each core has a reasonably sized private cache for its data. For gaming, the processor's 2 threads limit it to older or less demanding titles; modern games that rely on more than two threads would see limited performance, but the 50th percentile suggests it is not at the very bottom of the performance range. For content creation, the lack of SMT and the absence of a boost clock mean that multi-threaded rendering or video encoding tasks would only utilize two threads, which is a significant constraint. The locked multiplier prevents enthusiast tuning, so users must accept the stock 3.00 GHz frequency. The end-of-life status means that this processor is only relevant for legacy systems or as a drop-in replacement for an existing Socket 775 motherboard. The dual-channel memory support and DDR1/DDR2/DDR3 flexibility allow for some memory configuration choices, but the motherboard dictates which type is usable. Overall, the Pentium D 925 is suited for users with a compatible Socket 775 board who need a basic dual-core processor for everyday tasks, not for high-performance computing or modern multi-threaded software. The 50th percentile position implies that, in the broader context of all CPUs tracked, it sits in the middle of the pack, adequate for its era but not exceptional. For users running legacy applications that are single-threaded or lightly threaded, the 3.00 GHz clock provides a stable baseline. For those considering a purchase, the end-of-life status and lack of ECC support are important caveats, as are the locked multiplier and the motherboard-dependent memory support.

Power and Thermals

The Pentium D 925 carries a TDP of 95 watts. This is the only thermal specification provided in the fact pack. A 95W TDP class implies that a capable air cooler is required to maintain safe operating temperatures under sustained load. The processor is built on a 65 nm process node, which is a relatively mature lithography for the time, and the dual-die configuration (2x 81 mm²) means that heat is generated across two separate silicon dies. The 376 million transistor count distributed across these dies contributes to the thermal load. Since there is no boost clock, the thermal envelope is driven by the constant 3.00 GHz operating frequency. For a system builder or maintainer, a 95W TDP processor typically requires a mid-range cooling solution, such as a tower-style air cooler, rather than a low-profile or stock Intel cooler, though the specific cooler choice is not specified in the data. The locked multiplier means that users cannot reduce the voltage or clock through multiplier adjustments to lower thermals, so cooling must be selected based on the stock 95W envelope. The end-of-life status means that replacement coolers may be sourced from the aftermarket, but the thermal requirement remains fixed at 95W. The dual-die design also implies that heat is not concentrated in a single spot but rather spread across two physical locations, which can affect how a cooler's heat pipes or base plate contact the processor. The 65 nm process node, while older, is a factor in the power draw; smaller process nodes typically reduce leakage current, but the 95W TDP is a fixed target for this part. For users in thermally constrained environments, the 95W TDP is a moderate figure, suggesting that a standard desktop chassis with adequate airflow would suffice. However, without a boost clock, the processor does not experience transient thermal spikes, which simplifies cooling design. The absence of ECC memory also reduces the overall system power footprint, as ECC modules typically draw more power than non-ECC modules. In summary, the Pentium D 925's 95W TDP places it in a mainstream thermal class, requiring a standard aftermarket or high-quality stock cooler to operate reliably.