Intel Celeron D 325

The Intel Celeron D 325 is a single-core desktop processor from the NetBurst era, built on the Prescott codename using a 90 nm process. It operates at a base clock of 2.53 GHz with no boost capability, and the benchmark data places it at the 50th percentile among all CPUs, indicating a squarely mid-pack position historically. The processor carries a TDP of 73 watts, which is a notable figure for a single-core part, and it supports DDR1, DDR2, and DDR3 memory through a dual-channel interface. Production has ceased, and the chip is end-of-life, with a release date of June 23, 2004.

Benchmark Performance

The Celeron D 325 has an average benchmark score of 0, which is a baseline value rather than a measured workload result. This places it at the 50th percentile against all CPUs, meaning it sits exactly at the median of the distribution. Without direct benchmark scores, the performance characterization relies entirely on architectural attributes and the absence of rival data. The chip features one core and one thread, with a 16 KB L1 cache and a 256 KB L2 cache, which are modest figures for the era. The 90 nm manufacturing node and 125 million transistors on a 109 mm² die suggest a design focused on cost efficiency rather than raw throughput.

The lack of a boost clock means the 2.53 GHz base frequency is the maximum sustained speed, which limits single-threaded responsiveness compared to parts with dynamic frequency scaling. The NetBurst architecture is known for deep pipelines, which historically favored high clock speeds but suffered from inefficiency at lower frequencies. With no nearest rivals listed in the data, comparative percentage deltas cannot be computed. The 50th percentile ranking implies that half of all tested CPUs perform better and half perform worse, but the absence of a score prevents any granular analysis of where the Celeron D 325 falls within that median band.

Single-Thread vs Multi-Thread Behavior

The Celeron D 325 is strictly a single-threaded processor, with one core and one thread. This means all workloads are serialized, and there is no parallel execution capability whatsoever. For operating systems and applications from its 2004 release period, this was typical for entry-level desktop parts, but the architecture's behavior under load is dominated by the 2.53 GHz clock and the shallow 256 KB L2 cache. The small cache size likely causes frequent main-memory accesses, which can throttle performance in data-intensive tasks. The dual-channel memory bus helps mitigate this, but the supported DDR1, DDR2, and DDR3 standards span a wide range of speeds, and the actual bandwidth depends on the installed modules.

In single-threaded scenarios, the Celeron D 325's performance is a direct function of its clock speed and pipeline efficiency. The NetBurst design typically favored high frequency, and 2.53 GHz was a mid-range clock for the Prescott generation. The 16 KB L1 cache is split into instruction and data portions, but the total capacity is small by modern standards. For real workloads of the period, such as basic office tasks or web browsing, the processor would handle one foreground application adequately but struggle with background processes simultaneously. The lack of multi-threading means any context switch incurs full pipeline flushes, which is a known weakness of NetBurst's long pipeline depth.

Power and Thermals

The Celeron D 325 has a TDP of 73 watts, which is substantial for a single-core processor. This figure indicates that the chip requires a dedicated cooling solution capable of dissipating that level of heat, typically a stock aluminum heatsink with a fan. The 90 nm process node was not particularly efficient, and Prescott cores were known for higher power draw compared to earlier NetBurst variants. A 73-watt TDP places this chip in a class that demands adequate case airflow, but it does not require exotic cooling. A capable air cooler from the era would suffice, and the socket 775 platform generally provided a standard retention mechanism for such coolers.

The thermal implications of 73 watts are significant for system builders, as the processor generates heat that must be managed to maintain stability. The absence of a boost clock means the power draw is relatively constant under load, which simplifies thermal design—there is no transient spike from frequency ramping. The integrated graphics are not part of the processor die; instead, they are a chipset feature on certain motherboards, so the CPU's thermal output is limited to the core logic. The 125 million transistors on a 109 mm² die produce a power density that is high for the era, but the TDP figure is the only thermal metric available, and it suggests a mid-range cooling requirement.

How It Compares

The data provides no nearest rivals for the Intel Celeron D 325, so a positional analysis against specific competitors is not possible. The benchmark percentile of 50 indicates a median standing, but without rival names or delta percentages, the comparison cannot be articulated numerically. In the absence of direct rivals, the processor's positioning is defined by its own specifications: a single core, 2.53 GHz clock, and 256 KB L2 cache. These parameters place it in the entry-level desktop segment of its time, below higher-tier Pentium 4 models that typically offered larger caches and higher clock speeds. The lack of a boost clock and the locked multiplier (multiplierUnlocked: false) further cement its position as a budget-oriented part, though pricing data is not available.

The socket 775 compatibility is a notable feature, as it allows the Celeron D 325 to be installed on a wide range of motherboards from the mid-2000s. This platform longevity is a qualitative advantage, as it permits upgrades to other socket 775 processors without changing the motherboard. However, the chip's end-of-life status means it is no longer a viable new purchase, and its performance is fixed relative to modern CPUs. The 50th percentile ranking, while median, must be interpreted with caution, as the benchmark pool likely includes many older processors that have since been retired from active use.

FAQ

Q: What is the base clock speed of the Intel Celeron D 325?

A: The base clock is 2.53 GHz, and there is no boost clock, so this is the maximum operating frequency.

Q: Does this processor support multi-threading?

A: No, it has one core and one thread, meaning it can execute only a single thread at any given time.

Q: What memory types are compatible with the Celeron D 325?

A: It supports DDR1, DDR2, and DDR3 memory via a dual-channel memory bus, though the specific speed depends on the motherboard.

Q: Is the integrated graphics included on the processor die?

A: No, integrated graphics are a chipset feature available on certain motherboards, not part of the CPU itself.

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

A: The TDP is 73 watts, which implies a standard air cooler is sufficient, but adequate case airflow is recommended.

Q: Can the multiplier be unlocked for overclocking?

A: No, the multiplier is locked (multiplierUnlocked: false), so overclocking via multiplier adjustment is not possible.

Platform and Compatibility

The Intel Celeron D 325 uses the Intel Socket 775 interface, which is a land grid array (LGA) socket that was widely adopted in the mid-2000s. This socket supports a broad range of Intel processors from the NetBurst and later Core architectures, providing a potential upgrade path. The chip is based on the NetBurst architecture with the Prescott codename, and it integrates 125 million transistors on a 90 nm process node with a die size of 109 mm². The part number is SL7C5, which is a specific steeping identifier for this model.

Memory support includes DDR1, DDR2, and DDR3 through a dual-channel bus, though the actual memory controller resides on the motherboard chipset rather than the CPU. This means the maximum memory speed and capacity are dictated by the motherboard, not the processor. The PCIe interface is Gen 2, which is a generation older than current standards but was contemporary for the socket 775 era. This allows for discrete graphics cards and expansion cards using the PCIe Gen 2 protocol. The chip has no ECC memory support, which is typical for consumer desktop parts. The integrated graphics are not present on the CPU, but certain motherboards with embedded chipsets could provide video output, making the Celeron D 325 suitable for basic systems without a dedicated GPU. The production status is end-of-life, and the release date was June 23, 2004, indicating the chip is long obsolete for modern workloads but remains a historical reference point in the desktop processor timeline.