Intel Core 2 Duo E6400

The Intel Core 2 Duo E6400 is a desktop processor from Intel's Core 2 architecture, fabricated by Intel on the 65 nm Conroe design with 291 million transistors and a 143 mm² die. It has 2 cores and 2 threads, a 2.13 GHz base clock, no listed boost clock, 64 KB of L1 cache, and 2 MB of L2 cache. It uses Intel Socket 775, supports dual-channel DDR1, DDR2, and DDR3 memory, and is rated at a 65 W TDP. The product was released on 2006-07-26, is end-of-life, and carries the part number SL9S9. In the database, its percentile versus all CPUs is 50, while its benchmark list is empty and its average benchmark score field is 0.

Benchmark Performance

Benchmark data for the E6400 is not present. The benchmarks array is empty, the average benchmark score is 0, and nearestRivals is an empty list. Therefore, this page cannot quote exact percentage deltas or rival scores; there are no rival deltas in the fact pack. The only relative figure supplied is percentileVsAllCpus: 50. That places the entry at the midpoint of all CPUs in the database, but with no benchmark score behind it, the percentile should be treated as a database marker rather than as a measured performance rating.

What can be assessed from the specification sheet is the shape of the processor. 2 cores and 2 threads set a hard ceiling on parallel work. The 2.13 GHz base clock is the clock figure supplied; no boost clock is listed, so there is no higher turbo state in the record. The 64 KB L1 and 2 MB L2 define the cache footprint, and the dual-channel memory bus feeds both cores. From these facts, the expected behavior is a modest dual-core desktop part, but no score, frame rate, or render time can be assigned from this dataset. Any comparison to named rivals would require the nearestRivals data that is absent here.

Power and Thermals

The TDP is 65 W. This is the only power figure in the fact pack, and it places the CPU in a modest desktop power class. The process node is 65 nm, the transistor count is 291 million, and the die size is 143 mm². Those physical figures are part of the thermal picture, but the TDP figure is the direct thermal design target. No boost clock is listed, so there is no documented higher-power operating state to account for in cooling. The implied cooling tier is a capable air cooler; nothing in the data suggests the need for a large liquid system. Because the socket is Intel Socket 775, thermal solutions must match that mounting interface, but the 65 W class keeps the bar low. The 65 W TDP, the 65 nm process, and the 143 mm² die are all listed characteristics; no other power or thermal figures appear in the fact pack. The end-of-life status does not change the thermal requirement; it only affects availability of replacement parts.

Single-Thread vs Multi-Thread Behavior

The E6400 has 2 cores and 2 threads. Since the thread count equals the core count, there is a single logical thread per core in the supplied data; no extra logical threads are documented. The single-thread ceiling is therefore defined by the 2.13 GHz base clock, with 64 KB L1 and 2 MB L2 as the cache resources. There is no boost clock listed, so a single active core cannot rely on a turbo uplift setting. The multi-thread ceiling is defined by 2 cores at 2.13 GHz; a dual-channel memory bus helps move data to both cores, and the 2 MB L2 is the only L2 figure in the record.

For real applications, the split is straightforward. A program with a single main thread will use a single core and cap at 2.13 GHz. A program that can split into 2 threads can use both cores. A program that needs more than 2 threads will not find them on this part; the operating system must timeslice the 2 available cores. This makes the processor behavior more aligned with lightly threaded applications than with heavily threaded workloads. The lack of a boost clock is the most important single-thread limitation in the record: there is nothing to temporarily raise the clock above 2.13 GHz.

FAQ

Q: What socket does the Intel Core 2 Duo E6400 use?

A: It uses Intel Socket 775.

Q: Does the processor support ECC memory?

A: No. The fact pack lists ECC memory support as false.

Q: What memory types are supported?

A: DDR1, DDR2, and DDR3 are listed, over a dual-channel memory bus.

Q: Does the CPU have integrated graphics?

A: Integrated graphics are described as "On certain motherboards (Chipset feature)" rather than as a CPU specification.

Q: Is the multiplier unlocked?

A: No, the multiplier unlocked field is false.

Q: What was the launch MSRP?

A: The launch MSRP was $183.

Who Should Consider It

With no benchmark scores recorded, the suitability analysis must be inferred from the listed core, thread, clock, cache, memory, and TDP fields. The E6400 is a 65 W, 2-core, 2-thread Socket 775 processor with a 2.13 GHz base clock. That combination is usable for workloads that are satisfied by 2 threads and do not require a boost clock. For gaming, the processor can execute 2-thread game logic, but titles or engines that expect more than 2 active threads will be constrained by the 2-thread ceiling. For creation, applications that are written to use multiple cores will at most use 2; heavily threaded rendering or encoding will show the missing thread count more than the base clock. For office-style productivity, the 2.13 GHz core speed and 2 MB L2 are enough for document handling, but the end-of-life status means this is a maintenance part rather than a new-build recommendation. Because the average benchmark score is 0, no measured workload category can be assigned; users should rely on the structural limits of 2 threads and no boost clock.

Platform and Compatibility

The E6400 is an Intel Socket 775 part. The market segment is Desktop. Memory support includes DDR1, DDR2, and DDR3, with a dual-channel memory bus. ECC memory is not supported. The PCIe interface is listed as Gen 2. The processor itself is not listed with integrated graphics; the integrated graphics field is marked "On certain motherboards (Chipset feature)," meaning the motherboard chipset determines whether any display output exists. The multiplier is locked, as the multiplier-unlocked field is false. The production status is end-of-life, and the release date is 2006-07-26. Released on that date and now listed as end-of-life, this is a legacy desktop part within the dataset. The part number is SL9S9.

For an upgrade path, the fact pack contains no nearest-rival processors and only lists this CPU by part number; the only documented platform anchor is Intel Socket 775. The 65 nm process, 291 million transistor count, and 143 mm² die are fixed characteristics of this specific part. The absence of ECC and the locked multiplier define the platform as a mainstream desktop configuration rather than a workstation or enthusiast part. The PCIe Gen 2 interface means add-in boards are matched to that generation; nothing in the fact pack supports a higher revision. No L3 cache is listed, so the cache hierarchy is 64 KB L1 and 2 MB L2. DDR1, DDR2, and DDR3 support means the memory choice is tied to the motherboard's slots; the CPU record does not specify a preferred module type beyond those three.