AMD Athlon 64 X2 6400+ BE

The AMD Athlon 64 X2 6400+ BE is a desktop processor built for AMD Socket AM2. It has 2 cores, 2 threads, a 3.20 GHz base clock, and no boost clock listed in the data. The architecture is K8, the codename is Windsor, and the generation is listed as “Athlon 64 X2 (Windsor).” Fabricated on a 90 nm process, the die contains 227 million transistors and measures 230 mm². The cache hierarchy is 256 KB of L1 and 1 MB of L2, with no L3 cache. The TDP is 125 W, the memory bus is dual-channel, ECC memory is false, the PCIe interface is Gen 2, and the production status is end-of-life. The release date is 2007-08-19.

Single-Thread vs Multi-Thread Behavior — what the split means for real workloads

Threads are exactly equal to cores on this part: 2 and 2. There is no additional thread per core, so the CPU can handle 2 simultaneous hardware threads. For serial or lightly threaded software, the 3.20 GHz base clock is the only clock speed listed; there is no boost clock in the specification to add headroom under load. The K8 architecture and Windsor codename are the microarchitecture identifiers that describe the core design. The cache block lists 256 KB of L1 cache and 1 MB of L2 cache, and the L3 fields are null, so the processor has a shallow cache hierarchy that ends at L2.

A workload that can split into 2 threads will utilize both cores. A workload that needs more than 2 threads has no further hardware parallelism to draw from. Single-thread performance is therefore tied to the 3.20 GHz clock and the K8 core design, while multi-thread performance is limited to what 2 cores can do without any form of per-core dual-threading. The practical consequence is that this processor fits applications designed for the dual-core desktop era. Heavily threaded workloads that expect more than 2 hardware threads will not see scaling beyond the available cores. The absence of a boost clock also means the data offers no automatic frequency increase; the listed operating point is the 3.20 GHz base clock.

Power and Thermals — TDP class, what cooling tier it implies

The TDP is 125 W. That places this processor in the 125 W thermal class, which is not a low-power desktop segment. The physical context behind that TDP is a 90 nm process, 227 million transistors, and a 230 mm² die. These are the only power and physical figures in the FACT PACK; no maximum temperature is listed, and no bundled cooler is described. Builders planning a system around this CPU need to account for a 125 W-class heat load. The data does not specify whether the stock cooling solution is sufficient, so the cooler must be selected from the 125 W thermal class. Because the production status is end-of-life, current retail cooler guidance is not part of this record.

The die size and process node put the 6400+ BE in a specific physical envelope: 230 mm² on 90 nm with 227 million transistors. That combination is relevant for thermal density, but the only concrete thermal number is the 125 W TDP. A 125 W TDP is the thermal limit to plan around. The fact pack does not offer a lower-power mode or any additional power management figures, so the cooling decision should be conservative for the 125 W class.

Benchmark Performance — analyze scores vs rivals with exact % deltas

The FACT PACK contains no individual benchmark entries. The avgBenchmarkScore field is 0, and percentileVsAllCpus is 50. A 50th percentile is a midpoint position in the database: entries above and below are evenly split around this CPU. Because there are no benchmark scores behind the average, the 0 value is an empty data field rather than a measured performance result. The nearestRivals array is also empty, so no rival names, rival scores, or deltaPct values exist for this processor. This means the data cannot support any percentage-based comparison such as “ahead of X by Y%” or “behind Z by W points.”

The only usable ranking information is the 50th percentile. That places the 6400+ BE in the middle of the database distribution, but the absence of measured scores prevents a direct single-thread or multi-thread benchmark statement. Without nearestRivals and without benchmark entries, performance conclusions must be drawn from the architectural data: 2 cores, 2 threads, 3.20 GHz base clock, K8 architecture, and the cache configuration. No exact deltaPct values are available, so no rival comparison percentages can be reported.

Platform and Compatibility — socket, memory support, PCIe, upgrade path

The platform anchor is AMD Socket AM2. The memory bus is dual-channel, but the memorySupport field is null, so the data does not specify supported memory types, speeds, or capacities. ECC memory is listed as false, so ECC support is not present in this record. The PCIe interface is Gen 2. Integrated graphics are described as “On certain motherboards (Chipset feature),” which places graphics capability on the motherboard chipset rather than in the processor itself. The multiplier is unlocked, which indicates that the CPU frequency multiplier can be adjusted if the surrounding platform supports it.

The part number is ADX6400IAA6CZ. The release date is 2007-08-19, and the production status is end-of-life. For upgrade planning, the socket and chipset are the main compatibility gate: a motherboard must be Socket AM2. Memory selection cannot be confirmed from this CPU entry because memorySupport is null. The memoryBandwidth field is also null, so the data does not provide a bandwidth target. The L3 cache and vCache3d fields are null, so no extra cache layer beyond L2 is listed. Unlocked multiplier support makes the part a candidate for frequency adjustment, but board-level support determines what the platform can actually deliver.

How It Compares — position vs each nearest rival, one short paragraph per rival

The nearestRivals field is empty. There are no competitor names, scores, or deltaPct values in the data, so no rival-by-rival comparison can be constructed. The only comparative signal is percentileVsAllCpus equal to 50, which places this SKU in the middle of all CPUs in the database. The avgBenchmarkScore of 0 does not contribute a usable comparative figure because the benchmark array is empty. Accordingly, the data supports no statement about being ahead of or behind any specific processor.

FAQ — 4-6 Q&A pairs, each answerable from FACT PACK data

Q: What socket does the AMD Athlon 64 X2 6400+ BE use?

A: AMD Socket AM2.

Q: How many cores and threads does it have?

A: It has 2 cores and 2 threads; the core count and thread count are equal.

Q: What is the TDP?

A: The TDP is 125 W.

Q: What are the cache specifications?

A: The FACT PACK lists 256 KB of L1 cache and 1 MB of L2 cache; no L3 cache is listed.

Q: Does the processor include integrated graphics?

A: Integrated graphics are listed as “On certain motherboards (Chipset feature),” which means the capability comes from the motherboard chipset rather than from the CPU in this data.

Q: Is the multiplier unlocked?

A: Yes, multiplierUnlocked is true.