Intel Core i5-4258U vs Intel Xeon W3540 Comparison

Head-to-Head Benchmarks

The benchmark database records five head-to-head comparisons between the Intel Xeon W3540 and the Intel Core i5-4258U, all in Cinebench workloads. The Xeon W3540 wins every single test, with a remarkably consistent margin. In Cinebench R15 multi-core, the Xeon scores 267 against the Core i5's 222, a 20.3% advantage. That gap persists across newer Cinebench versions: R20 multi-core shows 1113 versus 929, a 19.8% delta, and R23 multi-core shows 2652 versus 2213, also a 19.8% delta. The single-core tests tell the same story. In Cinebench R20 single-core, the Xeon posts 157 against 131, another 19.8% gap. Cinebench R23 single-core narrows it slightly to 19.9%, with scores of 374 and 312.

The consistency of the margin is striking. Across all five tests, the Xeon W3540 leads by roughly 20% every time, regardless of whether the workload is heavily threaded or purely single-threaded. This suggests the advantage is not tied to core count scaling but to a fundamental per-thread performance edge. The Core i5-4258U does have one benchmark the Xeon cannot match: Geekbench. The database includes Geekbench multi-core and single-core results for the i5-4258U, scoring 1664 and 844 respectively, but no corresponding Geekbench scores are recorded for the Xeon W3540. So in the tests where both processors have data, the Xeon is ahead in all five, and the i5-4258U has no head-to-head wins.

The average benchmark score tells a similar tale, though the gap narrows. The Xeon W3540 averages 913 points across its recorded benchmarks, while the i5-4258U averages 902. That is only a 1.2% difference in aggregate, but the aggregate includes Geekbench results for the i5 that have no Xeon counterpart. In the shared Cinebench tests, the Xeon's lead is consistent at roughly 20%. The percentile rankings are identical: both processors sit at the 24th percentile among all CPUs in the database. That means both are in the lower-middle range of recorded performance, but the Xeon is the stronger part within that tier.

FAQ

Q: Which processor wins in multi-threaded workloads?

A: The Intel Xeon W3540 wins decisively. In Cinebench R23 multi-core, it scores 2652 against the Core i5-4258U's 2213, a 19.8% advantage. The R20 multi-core test shows the same margin, with the Xeon at 1113 and the i5 at 929.

Q: Is the single-core performance gap the same as the multi-core gap?

A: Yes, nearly identical. The Xeon W3540 leads by 19.8% in Cinebench R20 single-core (157 versus 131) and by 19.9% in Cinebench R23 single-core (374 versus 312). This indicates the Xeon's advantage is not dependent on thread count.

Q: Does the Core i5-4258U have any benchmark where it beats the Xeon?

A: In the recorded head-to-head data, no. The Xeon W3540 wins all five Cinebench comparisons. However, the database includes Geekbench scores for the i5-4258U (1664 multi-core, 844 single-core) with no corresponding Xeon results, so a direct comparison in Geekbench is not possible from the recorded data.

Q: How do these processors compare to their nearest rivals?

A: The Xeon W3540 sits within 0.5% of its nearest rivals. It is 0.2% behind the Intel Pentium Gold G6405T (915 versus 913), 0.3% ahead of the AMD PRO A12-9800E (910), and 0.5% behind the AMD Athlon Silver 3050U (917). The Core i5-4258U is similarly close to its rivals: 0.1% behind the Intel Core i5-5350U (903), 0.2% behind the Intel Core i7-940 (903), and 0.7% behind the Intel Core i3-4330T (908).

Q: Which processor has the higher TDP?

A: The Intel Xeon W3540 has a TDP of 130 watts, while the Intel Core i5-4258U has a TDP of 28 watts. This makes the i5-4258U far more power-efficient, though it comes at the cost of performance.

Q: What is the release date difference?

A: The Xeon W3540 was released in 2009, and the Core i5-4258U was released in 2013. The i5-4258U is four years newer, built on a smaller process node, yet it still trails the older Xeon by about 20% in every shared benchmark.

The Verdict

The data points to a clear winner for raw compute: the Intel Xeon W3540. It outperforms the Core i5-4258U by approximately 20% in every Cinebench test, both single-core and multi-core. The Xeon achieves this with four cores and eight threads, while the i5-4258U only has two cores and four threads. For anyone running CPU-bound workloads, the Xeon is the stronger choice based strictly on recorded performance.

However, the verdict is not one-sided. The Core i5-4258U has a TDP of 28 watts compared to the Xeon's 130 watts. That is a 102-watt difference, and it reflects the fundamental design goals of each chip. The Xeon is a server and workstation part from 2009, built for raw throughput in a powered environment. The i5-4258U is a mobile part from 2013, built for battery life and thermal constraints. If power draw matters more than performance, the i5-4258U is the sensible pick. If performance per watt is the metric, the i5-4258U is roughly 20% slower while using roughly 78% less power.

The average benchmark scores are nearly identical (913 versus 902), but that is misleading. The Xeon's average includes only Cinebench results, while the i5's average includes Geekbench results as well. In the tests where both have data, the Xeon wins every time. The percentile ranking is the same for both at 24%, so neither chip is a standout in the broader database. The practical advice is simple: choose the Xeon W3540 for compute-heavy tasks, choose the Core i5-4258U for low-power or mobile scenarios.

Specification Differences

The two processors differ in nearly every core specification. The Xeon W3540 has 4 cores and 8 threads, while the Core i5-4258U has 2 cores and 4 threads. Base clocks are 2.93 GHz for the Xeon and 2.40 GHz for the i5, with boost clocks of 3.20 GHz and 2.90 GHz respectively. The Xeon has a 130-watt TDP, the i5 has a 28-watt TDP. The Xeon uses the Intel Socket 1366 platform, while the i5 uses Intel BGA 1168, meaning the Xeon is socketed and the i5 is soldered. The Xeon supports ECC memory, the i5 does not. The Xeon has triple-channel memory support, while the i5's memory bus is not specified in the database. The Xeon supports PCIe Gen 2, while the i5's PCIe specification is not listed. The i5-4258U includes integrated graphics (Intel HD 5100), while the Xeon has no integrated graphics. Both processors have locked multipliers. The Xeon's part number is SLBEX, the i5's is SR18A.

Architecture Differences

The architectural gap between these two is substantial. The Xeon W3540 is built on the Nehalem architecture, codenamed Bloomfield, on a 45 nm process node. It contains 731 million transistors on a 263 mm² die. The Core i5-4258U is built on the Haswell architecture, also codenamed Haswell, on a 22 nm process node. It contains 1,400 million transistors on a 118 mm² die. The i5 packs nearly twice as many transistors into less than half the die area, a direct result of the newer manufacturing process.

Cache configurations differ as well. Both have 64 KB of L1 cache per core and 256 KB of L2 cache per core. The L3 cache is where they diverge: the Xeon has 8 MB of shared L3, while the i5 has 3 MB of shared L3. The Xeon's larger cache is a legacy of its server design, but the i5's smaller die and newer architecture partially compensate. The Xeon is from the Xeon Bloomfield generation, the i5 is from the Core i5 Haswell generation. Both support DDR3 memory, but the Xeon uses triple-channel while the i5's memory bus details are not recorded. The Xeon is marked as end-of-life production status, while the i5's status is not specified. The Xeon targets the server and workstation market, the i5 targets the mobile market.

Where Each One Wins

The benchmark results create a clear separation. The Intel Xeon W3540 wins in every scenario where compute performance is the priority. Its 20% lead in single-core Cinebench tests means even lightly-threaded applications will run faster on the Xeon. Its 20% lead in multi-core tests means heavily-threaded workloads, rendering, compilation, and simulation, will also favor the Xeon. The Xeon's 8 MB of L3 cache and 8 threads give it headroom for parallel tasks that the i5-4258U cannot match. The Xeon also supports ECC memory, which is a requirement for certain workstation and server use cases, and it uses a socketed platform, allowing upgrades or replacements without re-soldering.

The Core i5-4258U wins in power-constrained environments. Its 28-watt TDP makes it suitable for thin-and-light laptops, fanless designs, or any system where heat dissipation is limited. The Xeon's 130-watt TDP requires a robust cooling solution and a power supply capable of sustained high draw. The i5 also includes integrated graphics, so it can drive a display without a separate GPU, which is impossible with the Xeon. For mobile users, the i5's 2.90 GHz boost clock and Haswell architecture provide adequate performance for everyday tasks while preserving battery life. The i5's newer process node, 22 nm versus 45 nm, means less heat generated per unit of work, which is critical in compact chassis.

In the broader database context, both processors sit at the 24th percentile, meaning neither is a high-performance part by modern standards. But within this direct comparison, the Xeon W3540 is the compute winner in all five recorded tests, while the i5-4258U is the efficiency and integration winner. The choice depends entirely on whether the system prioritizes raw throughput or power economy. For a desktop or server that stays plugged in, the Xeon is the data-backed pick. For a laptop or low-power mini PC, the i5 is the only viable option.