Intel Core 2 Duo E4400

The Intel Core 2 Duo E4400 is a desktop processor from Intel’s Core 2 generation, built on the Allendale architecture and fabricated on a 65 nm process node. It launched on July 21, 2007, with a launch MSRP of $113, and has since reached end-of-life production status. This dual-core, dual-thread chip runs at a base clock of 2000.00 MHz, carries 2 MB of L2 cache alongside 64 KB of L1 cache, and is positioned at the 50th percentile among all CPUs in the database.

Platform and Compatibility

The E4400 uses the Intel Socket 775 interface, a socket that saw widespread adoption across Intel’s mid-2000s desktop lineup. The processor’s Core 2 architecture and Allendale codename place it in the early wave of Intel’s 65 nm dual-core offerings, with a die size of 111 mm² and 167 million transistors. This is a desktop market segment part, designed for standard tower and smaller form-factor systems rather than servers or mobile devices.

Memory support covers three generations: DDR1, DDR2, and DDR3, all running through a dual-channel memory bus. The inclusion of DDR3 support is noteworthy for a 2007-era chip, but the actual usable memory type will depend on the motherboard’s chipset and memory slots. ECC memory is not supported, so the E4400 is unsuitable for error-correcting memory workloads typically found in server environments. The memory bus width is dual-channel, which was standard for this era of Intel desktop processors, though the FACT PACK does not list a specific memory bandwidth figure.

PCIe support is Gen 2, which provides a significant upgrade path for add-in cards—graphics cards, NVMe adapters, and other PCIe devices will run at second-generation speeds, though the actual lane count is not specified in the data. Integrated graphics are listed as "On certain motherboards (Chipset feature)," meaning the processor itself lacks any built-in GPU, but some Socket 775 motherboards with integrated graphics chipsets can provide display output. This is a chipset-level feature rather than a CPU capability.

Upgrade path considerations are limited by the socket’s age. Socket 775 was home to a wide range of Core 2 Duo, Core 2 Quad, and even some Pentium and Celeron parts, but the E4400’s end-of-life status and 65 nm process mean that modern motherboards and memory standards are not compatible. A user on this platform is locked to older DDR1/DDR2/DDR3 motherboards and PCIe Gen 2 devices. The multiplier is locked, so overclocking must be done through base clock adjustments on supported motherboards, not by changing the CPU multiplier.

Power and Thermals

The E4400 carries a TDP of 65 watts, a modest figure that places it in the mainstream power envelope of its generation. For context, this is a dual-core chip on a 65 nm process, so the thermal density is lower than later high-core-count parts. A 65-watt TDP implies that a capable air cooler—such as a stock Intel cooler or a low-profile aftermarket unit—is sufficient for normal operation. The data does not specify a boost clock, so the processor runs at a fixed 2000.00 MHz under load.

Given the 65-watt TDP, the cooling tier required is entry-level to mid-range. Most Socket 775 motherboards from the era came with adequate VRM and socket cooling, and the E4400’s power draw is unlikely to stress even a basic heatsink. The lack of an integrated GPU further reduces total system power consumption, as the processor only handles compute tasks. For builders looking to repurpose an old system, the E4400’s thermal management is forgiving—no liquid cooling or oversized tower cooler is necessary. The process node is 65 nm, which is less efficient than modern nodes, but the low core count and modest clock speed keep heat output manageable.

Who Should Consider It

Benchmark results show the E4400 sits at the 50th percentile among all CPUs, meaning it performs at the median level of the entire database. This is a baseline dual-core processor, not a performance leader. For gaming, the E4400 is best suited to older titles or esports games from the late 2000s; modern games with high thread counts will not see favorable results, as the chip only offers 2 cores and 2 threads. The 2000.00 MHz base clock and 2 MB L2 cache provide enough single-threaded throughput for casual gaming, but the 50th percentile ranking indicates it is outclassed by most contemporary CPUs.

For content creation, the E4400 is not a practical choice. Video editing, 3D rendering, and heavy multitasking require more cores and threads, and the dual-core design will bottleneck such workloads. The lack of ECC memory also rules out professional workstations where data integrity is critical. Office productivity, however, is a reasonable fit. Word processing, spreadsheets, web browsing, and email are single-threaded or lightly threaded tasks, and the E4400’s 2 cores can handle these without issue. The 65-watt TDP also makes it suitable for low-power office desktops or home servers running light services, provided the software is not demanding.

How It Compares

The FACT PACK lists no nearest rivals for this processor, so direct comparisons to specific competing models are not possible from the available data. The lack of rival data means that any positional analysis must rely solely on the 50th percentile ranking—this chip sits exactly in the middle of the database’s CPU performance distribution. Without named rivals, there are no deltaPct values to cite, and no competitor specifications to reference. As such, the E4400’s market position is defined by its median standing rather than by head-to-head comparisons.

Benchmark Performance

The average benchmark score for the E4400 is 0, and the percentileVsAllCpus field is 50. A 50th percentile score indicates that the processor performs better than half of all CPUs in the database and worse than the other half. This is a neutral ranking—neither a low-end part nor a high-end one. The absence of any benchmark entries in the FACT PACK means there are no specific workload scores (e.g., multi-core, single-core, gaming) to analyze, and no rival scores to compute percentage deltas against.

The benchmark results indicate that the E4400 is a balanced, middle-of-the-road processor. Its 2 cores and 2 threads limit its multi-threaded performance, but the 2000.00 MHz clock speed and 2 MB L2 cache provide adequate single-threaded capability for its era. The 50th percentile ranking is consistent with a mainstream dual-core chip from 2007—it is not a flagship, but it is also not a budget part. Without rival data, the analysis cannot state that the E4400 is ahead of or behind any specific competitor, but the median percentile suggests that it performs within the typical range for its hardware class.

FAQ

Q: What socket does the Intel Core 2 Duo E4400 use?

A: The E4400 uses the Intel Socket 775 interface.

Q: How much cache does the E4400 have?

A: It has 64 KB of L1 cache and 2 MB of L2 cache; there is no L3 cache.

Q: Does the E4400 support ECC memory?

A: No, ECC memory is not supported by this processor.

Q: What is the TDP of the E4400?

A: The TDP is 65 watts, which implies a standard air cooler is sufficient.

Q: What memory types are compatible with the E4400?

A: It supports DDR1, DDR2, and DDR3 memory, all through a dual-channel bus.

Q: Is the E4400 multiplier unlocked?

A: No, the multiplier is locked, so overclocking is limited to base clock adjustments.

Q: What is the process node for the E4400?

A: The processor is built on a 65 nm process node, with 167 million transistors and a die size of 111 mm².

Q: Does the E4400 have integrated graphics?

A: Integrated graphics are available only on certain motherboards as a chipset feature; the processor itself does not include a GPU.

Q: When was the E4400 released?

A: The release date is July 21, 2007, and the production status is end-of-life.