Intel Xeon W3540

The Intel Xeon W3540 is a 4-core, 8-thread server and workstation processor from Intel’s Nehalem architecture, released in early 2009 on the Socket 1366 platform. Built on a 45 nm process with 731 million transistors and a 263 mm² die, this end-of-life part occupies the 23rd percentile of all CPUs in the database, with an average benchmark score of 909.

Benchmark Performance

The benchmark results for the Xeon W3540 reveal a processor that is firmly anchored in the entry-level segment of modern CPU performance. In Cinebench R23, the processor scores 2642 points in the multi-core test and 373 points in the single-core test. The multi-core score of 2642 is roughly seven times the single-core score of 373, reflecting the scaling of its four physical cores and eight threads under a fully parallel workload.

Looking at the average benchmark score of 909, the Xeon W3540 sits in a tight cluster with its nearest rivals. The data shows it trails the Intel Core i3-4330T by a negligible 0.1%, with that rival posting an average score of 910. Similarly, the AMD PRO A12-9800E also scores 910, placing the Xeon 0.2% behind. The Intel Core i5-5300U matches that 911 average score, again a 0.2% gap in favor of the rival. The only competitor the Xeon edges out is the Intel Core i5-4258U, which scores 906, giving the Xeon a 0.3% advantage. These deltas are all within a single percentage point, indicating that the Xeon W3540 delivers performance statistically indistinguishable from these much newer, lower-power parts.

In Cinebench R20, the multi-core score is 1109, while the single-core score is 156. The older Cinebench R15 multi-core test yields a score of 266. These numbers, when viewed against the 23rd percentile ranking, show that the Xeon W3540 is not competitive with modern mainstream processors. It is a chip that was designed for basic server tasks in 2009, and its absolute performance today places it near the bottom quartile of all CPUs tested.

Platform and Compatibility

The Xeon W3540 uses the Intel Socket 1366 interface, which was the premium desktop and entry-level server socket for the Nehalem generation. The architecture is Nehalem, with the codename Bloomfield, and it is manufactured on Intel’s 45 nm process node. The processor supports DDR3 memory through a triple-channel memory bus, which was a distinguishing feature of the Bloomfield platform at the time. ECC memory is supported, aligning with its server and workstation market segment.

The integrated memory controller on the Socket 1366 platform provides a direct connection to memory, and the triple-channel configuration offers substantial memory bandwidth for the era. However, the Xeon W3540 supports PCIe Gen 2, which is two generations behind current standards. The platform is end-of-life, meaning there is no forward upgrade path within the same socket for modern processors. The chip has a 130 W thermal design power, which is high by modern standards, and it is not multiplier unlocked, so overclocking flexibility is limited. The part number for this specific chip is SLBEX.

Who Should Consider It

Given its 23rd percentile ranking and average score of 909, the Xeon W3540 is not suited for modern gaming or demanding creative workloads. In gaming, the single-core score of 373 in Cinebench R23 is a clear indicator of limited performance, as most contemporary games rely heavily on strong single-thread performance. The processor would struggle to maintain high frame rates in current titles, and the lack of modern instruction set extensions further hampers compatibility.

For content creation, the multi-core scores provide a clearer picture. The Cinebench R23 multi-core score of 2642 shows that the chip can complete rendering tasks, but very slowly compared to modern processors. A user working with occasional, light photo editing might find it usable, but video editing or 3D rendering workflows would be painfully slow. The R20 multi-core score of 1109 reinforces this assessment.

Office productivity is the only area where this processor might still function adequately. Basic tasks like word processing, spreadsheets, and web browsing are not heavily multi-threaded, and the single-core score of 373, while low, is sufficient for these undemanding applications. However, the high power draw of 130 W and lack of modern features make it an inefficient choice for such workloads. The processor is best suited for legacy server applications or as a collector’s item for vintage hardware enthusiasts, not for any modern primary workload.

How It Compares

Against the Intel Core i3-4330T, the Xeon W3540 is effectively tied, with the i3-4330T holding a 0.1% higher average score (910 vs. 909). This is remarkable given that the i3-4330T is a much newer, dual-core part from the Haswell generation, while the Xeon is a four-core Nehalem chip. The performance parity suggests that the Xeon’s extra cores do not compensate for its older architecture’s lower IPC.

The AMD PRO A12-9800E comparison shows a similar story. The AMD part, a quad-core APU from the Bristol Ridge generation, scores 910, which is 0.2% ahead of the Xeon. The A12-9800E also has integrated graphics, which the Xeon lacks, making the AMD part a more versatile option despite the negligible performance difference.

Versus the Intel Core i5-5300U, a low-power dual-core Ultrabook processor, the Xeon is 0.2% behind (911 vs. 909). This is a stark illustration of architectural progress: a 15-watt mobile chip from 2015 matches a 130-watt server chip from 2009 in average benchmark score. The i5-5300U achieves this with far lower power consumption and a smaller physical footprint.

The only rival the Xeon leads is the Intel Core i5-4258U, which scores 906. The Xeon’s 0.3% advantage is marginal and well within run-to-run variation. The i5-4258U is another low-power dual-core part, and its presence in this comparison group highlights how far mobile processors have come in closing the gap with older desktop and server parts.

Single-Thread vs Multi-Thread Behavior

The gap between single-thread and multi-thread performance in the Xeon W3540 is substantial, which is typical for a chip with only four physical cores. In Cinebench R23, the multi-core score of 2642 is 7.08 times the single-core score of 373. The theoretical maximum scaling for four cores with eight threads would be 8x, so the achieved scaling of about 7x indicates that the hyper-threading implementation is working efficiently under this workload.

In Cinebench R20, the multi-core score of 1109 against a single-core score of 156 yields a scaling factor of 7.11, nearly identical to the R23 result. This consistency suggests that the processor’s thread scheduling and cache architecture are well-balanced for rendering tasks.

For real-world workloads, this means the Xeon W3540 will show its best relative performance in heavily threaded applications like video encoding or batch image processing, where the 7x scaling can be exploited. In contrast, single-threaded tasks such as web browsing, legacy software, or older games will only access the 373-point single-core performance, which is very weak by modern standards. The 8 MB of shared L3 cache helps mitigate some of the latency penalties of the older architecture, but the fundamental single-core IPC limitation remains the primary bottleneck in everyday use.

FAQ

Q: What is the average benchmark score of the Intel Xeon W3540?

A: The average benchmark score is 909, which places it in the 23rd percentile of all CPUs in the database.

Q: How does the Xeon W3540 compare to the Intel Core i5-4258U?

A: The Xeon W3540 holds a 0.3% advantage in average score (909 vs. 906) over the Core i5-4258U.

Q: What memory configuration does the Xeon W3540 support?

A: It supports DDR3 memory through a triple-channel memory bus, with ECC memory capability.

Q: What is the multi-core performance in Cinebench R23?

A: The Cinebench R23 multi-core score is 2642, while the single-core score is 373.

Q: Does the Xeon W3540 have integrated graphics?

A: No, the integrated graphics field is null, meaning the processor does not include any graphics solution.

Q: What socket does the Xeon W3540 use?

A: It uses the Intel Socket 1366 interface, and the processor is end-of-life with no upgrade path.