Intel Core i5-5250U vs Intel Xeon X5492 Comparison

The Intel Core i5-5250U and Intel Xeon X5492 occupy opposite ends of the hardware spectrum: a 15-watt dual-core mobile chip from 2015 versus a 150-watt quad-core server processor from 2008. Despite the seven-year gap and radically different design goals, benchmark results show they land in the same performance tier, with average scores of 856 and 852 respectively. This creates an unusual head-to-head where the older, higher-power Xeon consistently outpaces the modern ultrabook part, yet the overall competitive picture is far closer than the architectural disparity suggests.

Head-to-Head Benchmarks

The Xeon X5492 wins every single benchmark in this comparison, but the margins are remarkably consistent rather than overwhelming. In Cinebench R15 multi-core, the Xeon scores 249 against the i5-5250U’s 209, a 16.1% advantage. That pattern repeats almost identically across every other test: Cinebench R20 multi-core shows 1039 versus 873 (16% ahead), and Cinebench R23 multi-core shows 2475 versus 2079 (16% ahead). The consistency of these deltas suggests the performance gap is structural — tied to core count and clock speed — rather than workload-dependent.

Single-core results tell the same story with slightly smaller margins. The Xeon leads Cinebench R20 single-core by 15.8% (146 versus 123) and Cinebench R23 single-core by 16% (349 versus 293). This is notable because the i5-5250U has a 2.70 GHz boost clock, while the Xeon runs at a fixed 3.40 GHz with no boost. The Xeon’s raw clock advantage of 0.70 GHz translates into a nearly uniform 16% lead across both single-threaded and multi-threaded workloads, indicating that the newer Broadwell architecture’s efficiency gains cannot fully compensate for the older chip’s higher frequency and additional physical cores.

Interestingly, the two CPUs are direct rivals in the nearestRivals data, with the i5-5250U averaging 856 and the Xeon averaging 852 — a 0.5% delta in favor of the i5. This is because the i5 has Geekbench scores (1587 multi-core, 825 single-core) that the Xeon lacks, and those results pull the averages together. Within the shared Cinebench suite, the Xeon is decisively ahead, but the broader benchmark picture shows the i5 holding its own when different test methodologies are included. The data also places both chips at the 23rd percentile of all CPUs, reinforcing that neither is a performance leader by modern standards.

The Verdict

From the data alone, the Xeon X5492 is the faster processor in every measured Cinebench workload, delivering a consistent 16% advantage across multi-core and single-core tests. Anyone prioritizing raw compute throughput in these specific benchmarks should choose the Xeon. However, the verdict is not that simple. The i5-5250U achieves near-parity in average benchmark score (856 versus 852) despite being a 15-watt mobile part, and it does so with integrated graphics, a 14 nm process, and DDR3 memory support — features the Xeon lacks entirely.

The Xeon’s 150-watt TDP and server/workstation market segment make it a poor fit for any system where power efficiency matters. The i5-5250U’s 15-watt TDP is one-tenth the Xeon’s draw, and while the benchmark scores favor the Xeon, the i5’s performance-per-watt is dramatically better. For a laptop or compact system, the i5 is the only sensible choice. For a stationary workstation where electricity is cheap and the motherboard supports Socket 771, the Xeon offers measurably higher scores. The data shows a clear tradeoff: 16% more performance in Cinebench versus 90% less power consumption. There is no universal winner — only the right tool for the context.

Where Each One Wins

The Xeon X5492 wins in every scenario where the Cinebench suite is the primary workload metric. Its four physical cores at 3.40 GHz consistently outpace the i5-5250U’s two cores with Hyper-Threading at a 2.70 GHz boost. Multi-threaded rendering, batch processing, or any task that scales across cores will favor the Xeon by roughly 16%. The Xeon also supports ECC memory, making it suitable for error-sensitive server or workstation workloads where data integrity is paramount. Its dual-die design with 6 MB of L2 cache per die provides a substantial cache pool for the era, though modern workloads may not leverage this as effectively as newer cache hierarchies.

The i5-5250U wins in every scenario where power consumption, mobility, or integrated graphics matter. Its 15-watt TDP allows for fanless or low-noise designs, and the integrated Intel HD 6000 graphics provide display output without a discrete GPU — something the Xeon cannot offer with its lack of integrated graphics. The i5’s DDR3 memory support and dual-channel 29.9 GB/s bandwidth are adequate for mobile workloads, and its 14 nm process node gives it a massive efficiency advantage over the Xeon’s 45 nm node. The i5 also has a newer release date (2015 versus 2008), meaning better instruction set support and platform features like PCIe Gen 2 with 12 lanes. For any battery-powered device or compact chassis, the i5 is the clear winner despite losing every benchmark.

FAQ

Q: Which CPU has a higher multi-core score in Cinebench R23?

A: The Intel Xeon X5492 scores 2475 in Cinebench R23 multi-core, which is 16% higher than the Intel Core i5-5250U’s 2079.

Q: How much power does each processor consume?

A: The Intel Core i5-5250U has a TDP of 15 watts, while the Intel Xeon X5492 has a TDP of 150 watts — a tenfold difference in favor of the i5.

Q: Do both processors support ECC memory?

A: No. The Intel Xeon X5492 supports ECC memory, while the Intel Core i5-5250U does not.

Q: What is the average benchmark score for each CPU?

A: The Intel Core i5-5250U has an average benchmark score of 856, and the Intel Xeon X5492 has an average benchmark score of 852, making them near-identical overall.

Q: Which processor has integrated graphics?

A: The Intel Core i5-5250U includes Intel HD 6000 integrated graphics. The Intel Xeon X5492 has no integrated graphics.

Q: What are the release dates for these two chips?

A: The Intel Core i5-5250U was released on 2015-02-28, and the Intel Xeon X5492 was released on 2008-09-07.

Architecture Differences

The two processors come from entirely different architectural eras. The Intel Core i5-5250U is built on Broadwell-U, a 14 nm process with 1,900 million transistors on a 133 mm² die. It features 2 physical cores and 4 threads via Hyper-Threading, with a base clock of 1600 MHz and a boost clock of 2700 MHz. The cache hierarchy consists of 64 KB L1 per core, 256 KB L2 per core, and 3 MB of shared L3 cache. It uses an Intel BGA 1168 socket, supports dual-channel DDR3 memory with 29.9 GB/s bandwidth, and includes Intel HD 6000 integrated graphics.

The Intel Xeon X5492 is based on the older Core 2 architecture, specifically the Harpertown codename. It uses a 45 nm process with 820 million transistors spread across two dies, each measuring 107 mm². It has 4 physical cores and 4 threads (no Hyper-Threading), running at a fixed 3.40 GHz with no boost capability. Cache is organized as 64 KB L1 per core and 6 MB L2 per die, with no L3 cache present. It uses an Intel Socket 771, supports both DDR2 and DDR3 memory in dual-channel configuration, and has ECC memory support — a feature absent from the i5. The Xeon’s PCIe implementation is Gen 2 without a specified lane count, while the i5 offers Gen 2 with 12 lanes from the CPU.

The transistor count difference is stark: the i5 packs 1,900 million transistors despite having fewer cores, reflecting the density advantage of 14 nm versus 45 nm. The Xeon’s dual-die design means each physical package contains two separate 107 mm² chips, whereas the i5 uses a single 133 mm² die. This explains why the Xeon’s L2 cache is per-die rather than per-core, and why the i5 can offer a shared L3 cache. The integrated graphics on the i5 add significant die area and functionality that the Xeon simply does not have, as server processors of that era relied on discrete GPUs. The i5’s part number is SR26C, while the Xeon’s is SLBBD, and both are end-of-life production. The i5 has a launch MSRP of $315, while the Xeon launched at $1493, reflecting their very different market positions.