Intel Core i3-5157U vs Intel Xeon X3460 Comparison

The Intel Xeon X3460 and Intel Core i3-5157U represent two very different philosophies in processor design: a high-power, multi-threaded server/workstation part from 2009 versus a low-power, mobile-focused chip from 2015. The benchmark data shows a surprisingly consistent performance hierarchy, with the older Xeon winning every single head-to-head test, yet the two processors land in the same performance percentile overall, telling a nuanced story about generational efficiency versus raw core count.

Head-to-Head Benchmarks

The data is unambiguous in the direct comparisons: the Intel Xeon X3460 wins all five head-to-head Cinebench tests, with no wins for the Core i3-5157U. The margin is remarkably consistent across both single-core and multi-core workloads. In the Cinebench R15 multi-core test, the Xeon scores 253 against the i3's 222, a 14% advantage. That margin expands only slightly in Cinebench R20 multi-core, where the Xeon's 1057 score beats the i3's 925 by 14.3%.

The single-core results follow the same pattern, which is notable because newer architectures typically have superior per-core performance. In Cinebench R20 single-core, the Xeon scores 149 versus 130 for the i3, a 14.6% lead. The Cinebench R23 tests confirm this trend: the Xeon leads by 14.3% in multi-core (2518 vs. 2203) and by 14.1% in single-core (355 vs. 311).

What makes these numbers particularly interesting is that the Xeon achieves these wins with a lower memory bandwidth (21.3 GB/s versus 29.9 GB/s for the i3) and a smaller process node disadvantage (45 nm versus 14 nm). The consistent 14% delta suggests that the Xeon's architectural advantages—specifically its 4 cores/8 threads versus the i3's 2 cores/4 threads—are the primary driver, rather than any single benchmark quirk. The Xeon's boost clock of 3.47 GHz also contributes, though its base clock of 2.80 GHz is only slightly higher than the i3's fixed 2.50 GHz (the i3 has no boost clock).

Architecture Differences

The architectural gap between these two processors is vast, spanning six years of Intel design evolution. The Xeon X3460 uses the Nehalem architecture on the Lynnfield codename, built on a 45 nm process at Intel's foundry. It packs 774 million transistors on a 296 mm² die. The Core i3-5157U, in contrast, uses the Broadwell architecture (Broadwell-U codename) on a 14 nm process, with 1,900 million transistors on a much smaller 133 mm² die. The transistor count is nearly 2.5 times higher on the i3, but the die area is less than half, showcasing the density improvements of the newer process.

Cache configurations differ significantly. The Xeon has 64 KB of L1 cache per core, 256 KB of L2 per core, and a large 8 MB shared L3 cache. The i3 has the same per-core L1 and L2 sizes, but only 3 MB of shared L3. This 5 MB difference in L3 is substantial and likely contributes to the Xeon's consistent performance lead in both single and multi-threaded tests.

Memory support shows a mixed picture. Both use DDR3 with dual-channel memory buses, but the i3 has a higher memory bandwidth at 29.9 GB/s versus 21.3 GB/s for the Xeon. The Xeon supports ECC memory, making it suitable for error-sensitive server workloads, while the i3 does not. PCIe support also differs: the Xeon offers Gen 2 with 16 lanes (CPU only), while the i3 provides Gen 2 with 12 lanes. The i3 includes integrated Intel Iris 6100 graphics; the Xeon has no integrated graphics at all.

The platform targets are fundamentally different. The Xeon uses Intel Socket 1156 and is classified as a Server/Workstation part with a 95 W TDP. The i3 uses Intel BGA 1168, is a Mobile part, and draws just 28 W. The i3's launch MSRP is $315, while the Xeon's launch MSRP is $316.

Where Each One Wins

Based strictly on the benchmark data, the Xeon X3460 wins every workload category tested. Its 14-14.6% lead in single-core tests is particularly noteworthy, as it demonstrates that the older architecture is not merely compensating with extra cores—it genuinely outperforms the newer chip on a per-thread basis in Cinebench. The multi-core results, with leads of 14 to 14.3%, reflect the Xeon's 4-core/8-thread configuration against the i3's 2-core/4-thread setup.

The Core i3-5157U, despite losing every Cinebench test, has its own advantages that the benchmark suite does not capture. Its 28 W TDP versus 95 W for the Xeon makes it dramatically more power-efficient—roughly 3.4 times lower thermal design power. The i3 also has integrated graphics (Intel Iris 6100), which the Xeon lacks entirely, meaning the i3 can power a complete system without a discrete GPU. The i3's higher memory bandwidth (29.9 GB/s) and larger transistor count (1,900 million) indicate architectural sophistication that could benefit other workloads, though the provided data does not include such tests.

For a user with Cinebench-centric workloads, the Xeon is the clear choice. For scenarios requiring integrated graphics, low power consumption, or mobile form factors, the i3 is the only viable option in this comparison—the Xeon's 95 W TDP and lack of iGPU would be disqualifying in those contexts. The i3's 2.50 GHz base clock, with no boost capability, is fixed, while the Xeon can dynamically reach 3.47 GHz.

The Verdict

The data presents a straightforward verdict: the Intel Xeon X3460 outperforms the Intel Core i3-5157U in every measured Cinebench workload, with a consistent 14-14.6% margin across single and multi-core tests. The Xeon's 4 cores/8 threads and larger 8 MB L3 cache give it a decisive advantage that the i3's newer 14 nm process and higher memory bandwidth cannot overcome. The i3-5157U's 2 cores/4 threads and 3 MB L3 cache simply do not compensate in compute-heavy rendering tasks.

However, the verdict is not a blanket endorsement. The Xeon's 95 W TDP, server/workstation market segment, and lack of integrated graphics make it unsuitable for mobile or power-constrained systems. The i3, with its 28 W TDP and Intel Iris 6100, is the only option for thin-and-light laptops or compact desktops without discrete GPUs. The i3's 29.9 GB/s memory bandwidth is also superior, though this does not translate into Cinebench wins.

Both processors share the same 23rd percentile versus all CPUs, and their average benchmark scores are nearly identical (866 for the Xeon, 877 for the i3). This parity in overall standing, despite the Xeon's head-to-head dominance, suggests that the i3's strengths lie outside the tested workloads. The Xeon's nearest rivals include the Intel Core i7-3540M (avg score 867, deltaPct -0.1%) and Intel Xeon W3520 (avg score 862, deltaPct 0.5%). The i3's nearest rivals include the AMD Ryzen 3 2300U (avg score 880, deltaPct -0.3%) and Intel Core i3-1000NG4 (avg score 881, deltaPct -0.4%). These rivalries show both chips are competitive within their respective performance tiers.

Pick the Xeon X3460 for raw multi-threaded rendering performance, ECC memory support, and server-grade reliability. Pick the Core i3-5157U for integrated graphics, dramatically lower power consumption, and mobile deployment.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon X3460 has 4 cores and 8 threads, while the Intel Core i3-5157U has 2 cores and 4 threads.

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

A: The Xeon X3460 scores 2518, which is 14.3% higher than the Core i3-5157U's score of 2203.

Q: Does either processor support ECC memory?

A: Yes, the Intel Xeon X3460 supports ECC memory. The Intel Core i3-5157U does not support ECC memory.

Q: Which processor has integrated graphics?

A: The Intel Core i3-5157U includes Intel Iris 6100 integrated graphics. The Intel Xeon X3460 has no integrated graphics.

Q: What are the TDP ratings for these processors?

A: The Intel Xeon X3460 has a TDP of 95 W, while the Intel Core i3-5157U has a TDP of 28 W.

Q: How does the memory bandwidth compare between the two?

A: The Intel Core i3-5157U has a higher memory bandwidth at 29.9 GB/s, compared to 21.3 GB/s for the Intel Xeon X3460. Both use dual-channel DDR3 memory.