Intel Xeon MP 3.66

The Intel Xeon MP 3.66 is a single-core server/workstation processor from Intel, built on the 90 nm NetBurst process under the Cranford codename in the Xeon MP generation. It has a listed base clock of 3.67 GHz, no boost clock, 1 MB of L2 cache, 16 KB of L1 cache, and a TDP of 135. The part uses Intel Socket 604, supports a dual-channel memory bus with ECC memory, and is marked end-of-life with a release date of 2005-03-28. The database places this processor at the 50th percentile among all CPUs, while its average benchmark score is 0 and the benchmark list is empty, so conclusions must rely on the architectural data present.

Who Should Consider It

The workload profile is defined by one core and one thread. That makes the Intel Xeon MP 3.66 a candidate only for tasks that can operate within a single logical processor. The market segment field is Server/Workstation, so the intended environment is server or workstation infrastructure rather than general client use. For workloads such as legacy single-threaded server processes that depend on a single high-clock request stream, the 3.67 GHz base clock is the relevant performance attribute. The absence of a boost clock means there is no higher listed frequency for peak short-duration workloads; the 3.67 GHz value is the only operating clock given.

For office-style productivity, the single thread is a hard boundary. Applications that use only one thread can run, but any workload that expects thread-level scaling will see no parallel headroom. For creation workloads such as rendering, encoding, or simulation that normally scale across cores, the 1-core/1-thread configuration is a fundamental limit. The ECC memory support points toward data-integrity-sensitive server tasks, where memory errors are less acceptable. However, with an empty benchmark list and no nearest rivals, there are no measured scores to anchor a specific recommendation. The processor is therefore best suited to environments where the workload is known to be single-threaded and the platform is already Socket 604-based.

The end-of-life status further narrows consideration. This is not a part for new system planning. It belongs to an older server/workstation segment, and the data shows no boost mechanism and no unlocked multiplier. Anyone considering it should expect a strictly single-threaded execution model, no overclocking path through the multiplier, and no refresh of production support.

Power and Thermals

The TDP is listed as 135. That places the processor in a power class that requires a cooling solution appropriate for a server/workstation part. The fact pack does not specify cooler size or thermal solution, so no cooler dimensions can be stated. The 90 nm process node and NetBurst architecture are the process-level facts available; together with the single-core design, they indicate that the thermal envelope is concentrated into one active core. The 135 TDP is the only quantitative thermal data point.

Because no boost clock is listed, there is no separate higher-frequency state to consider in thermal planning. The processor’s operating frequency is represented by the single 3.67 GHz base clock. The multiplier is not unlocked, so user-selectable multiplier adjustment is not available. The production status is end-of-life, meaning thermal guidelines would come from an older platform generation. A capable air cooler is the implied cooling tier for a part of this TDP class and market segment, but the exact cooler specification is not present in the fact pack.

Single-Thread vs Multi-Thread Behavior

The behavior is almost entirely defined by the core and thread counts: 1 core and 1 thread. There is no second thread to absorb independent work. Any multi-threaded workload will observe exactly one logical processor. The single-thread behavior is driven by the 3.67 GHz base clock, with no boost clock listed to provide a higher transient frequency. In practical terms, the processor can only execute one instruction stream at a time.

The cache hierarchy is modest: 16 KB of L1 cache and 1 MB of L2 cache. No L3 cache is listed. For a single-threaded part, the 1 MB L2 cache is the largest cache level in the data, and it is available entirely to the one core. Multi-thread performance cannot be inferred because there are no additional cores or threads to measure. The memory bus is dual-channel, and ECC memory is supported, so memory transfers can operate across two channels; however, no memory bandwidth figure or memory support specification is present in the fact pack.

The split between single-thread and multi-thread behavior is therefore one-sided. Single-thread tasks are the only type that can be handled, and the 3.67 GHz base clock is the metric that defines them. Multi-threaded tasks will not scale, because there is no thread-level parallelism available at the processor level.

How It Compares

The nearestRivals array is empty. There are no rival names, scores, or deltaPct values listed for the Intel Xeon MP 3.66. Therefore, a rival-by-rival comparison cannot be produced from the data. The only relative placement available is the percentile field: the processor sits at the 50th percentile among all CPUs in the database. That is a median position, but it is not tied to any benchmark score in the fact pack because the benchmark list is empty and the average benchmark score is 0.

Without nearest-rival entries, no percentage lead or deficit can be stated. The absence of rival data means the comparison section must be limited to what the fact pack provides: an empty rival list and a midpoint percentile. There is no way to say whether the Intel Xeon MP 3.66 is ahead of or behind another specific processor, because no rival records exist. The 50th percentile is the sole available comparative data point, and it indicates that the part falls in the middle of the database’s historical CPU distribution.

FAQ

Q: How many cores and threads does the Intel Xeon MP 3.66 have?

A: It has 1 core and 1 thread.

Q: What is the base clock speed?

A: The listed base clock is 3.67 GHz; no boost clock is listed.

Q: Which socket does the processor use?

A: It uses Intel Socket 604.

Q: Does it support ECC memory?

A: Yes, ECC memory is listed as true, and the memory bus is dual-channel.

Q: What architecture and process node is it built on?

A: It uses the NetBurst architecture with the codename Cranford, built on Intel’s 90 nm process.

Q: Is the multiplier unlocked?

A: No, the multiplier is not unlocked.

Q: Is the processor still in production?

A: No, its production status is end-of-life; its release date is 2005-03-28.

Platform and Compatibility

The socket is Intel Socket 604. This is the physical interface listed for the processor, and it is the major platform compatibility fact in the data. The memory bus is dual-channel, and ECC memory support is listed as true. No memory support field is provided, so memory type, speed, and capacity are not specified in the fact pack. The processor’s generation is listed as “Xeon MP (Cranford),” and the architecture is NetBurst.

No PCIe data is listed, so PCIe generation and lane counts should not be assumed. The integrated graphics field is not populated, meaning no integrated graphics information is available. The multiplier is not unlocked, so the user multiplier path is unavailable. The production status is end-of-life, and the release date is 2005-03-28.

For upgrade considerations, the data does not identify a successor socket or a compatible chipset. The fact pack contains no platform roadmap. The 90 nm process and Xeon MP (Cranford) generation indicate an older server/workstation platform. Any upgrade would have to depart from the Socket 604 platform, but the fact pack does not list an alternative socket. The absence of a boost clock and the locked multiplier further restrict the flexibility of the processor after installation.

Benchmark Performance

The benchmark data is minimal: the benchmarks array is empty, and the average benchmark score is 0. This should not be read as a measured performance result. An empty benchmark list means there are no individual workload scores to aggregate. Consequently, the 0 average is an empty aggregate rather than a meaningful performance figure.

The only relative performance position is the 50th percentile among all CPUs. That places the Intel Xeon MP 3.66 at the midpoint of the database distribution, but it cannot be tied to any specific workload result because no benchmark records are present. The nearestRivals array is also empty, so there are no exact percentage deltas to report. The database does not provide a comparison such as “30% ahead of X in multi-core,” and no such figure can be derived from the available data.

What can be stated from the fact pack is limited to the fixed characteristics: 1 core, 1 thread, 3.67 GHz base clock, 16 KB L1 cache, 1 MB L2 cache, and 135 TDP. These are the values that define the part’s expected single-thread behavior. The absence of a boost clock means there is no higher listed frequency to consider. The absence of L3 cache means no third-level cache figure is available. The 50th percentile is the only comparative benchmark-related number, and with an empty benchmark list it stands as a placement marker rather than a tested score. Any performance analysis beyond these points would require data not present in the fact pack.