Intel Core i5-5250U vs Intel Xeon X3460 Comparison

The Intel Xeon X3460 and Intel Core i5-5250U represent two very different design philosophies from Intel, separated by nearly six years of process technology evolution. The Xeon is a server-oriented quad-core part built on 45 nm Nehalem architecture, while the i5 is a mobile-focused dual-core Broadwell-U chip on 14 nm. Despite the generational gap, both processors land in the same performance percentile, which makes their head-to-head results particularly instructive for understanding how core count versus architectural efficiency plays out in real workloads.

Head-to-Head Benchmarks

The benchmark data shows a consistent and decisive victory for the Intel Xeon X3460 across every Cinebench test in the comparison. The Xeon wins all five head-to-head matchups, with the Core i5-5250U failing to take a single test. This is a clean sweep, but the margins reveal an interesting pattern: the Xeon's advantage is nearly identical across both multi-core and single-core workloads.

In Cinebench R15 multi-core, the Xeon posts a score of 253 against the i5's 209, a delta of 21.1 percent. The R20 multi-core test shows the same 21.1 percent gap, with the Xeon scoring 1057 versus 873. Moving to R23 multi-core, the Xeon's 2518 beats the i5's 2079 by the same 21.1 percent margin. This consistency across generations of the Cinebench suite suggests that the performance differential is structural rather than workload-specific.

The single-core results tell the same story. In R20 single-core, the Xeon scores 149 against the i5's 123, again a 21.1 percent lead. The R23 single-core test shows the Xeon at 355 versus 293, a slightly larger 21.2 percent advantage. This is notable because the i5-5250U has a newer architecture and a higher boost clock relative to its base, yet it still cannot overcome the Xeon's raw clock speed and older but more powerful core design.

The Xeon's average benchmark score of 866 places it just 0.1 percent behind the Intel Core i7-3540M (867) and 0.3 percent ahead of the Intel Core i5-3470T (863). The i5-5250U's average score of 856 puts it exactly level with the Intel Core i5-2500T (856) and 0.4 percent behind the Intel Core i7-4500U (859). Both chips sit at the 23rd percentile among all CPUs, confirming that they are closely matched in overall performance despite the Xeon's dominance in the specific Cinebench tests.

The Xeon's 21.1 percent lead in multi-core is direct evidence of its two extra cores and four extra threads. The i5-5250U's two cores and four threads simply cannot match the Xeon's four cores and eight threads in heavily threaded workloads. However, the single-core margin is equally telling—it shows that the Xeon's 3.47 GHz boost clock provides more raw single-thread throughput than the i5's 2.70 GHz boost, despite the i5's newer 14 nm process.

FAQ

Q: Which processor wins the majority of the head-to-head benchmark comparisons?

A: The Intel Xeon X3460 wins all five head-to-head benchmarks against the Intel Core i5-5250U. The wins cover Cinebench R15, R20, and R23 in both multi-core and single-core tests, with the Xeon taking a 5-0 lead in the matchup.

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

A: The Xeon X3460 scores 2518 in Cinebench R23 multi-core, while the i5-5250U scores 2079. This gives the Xeon a 21.1 percent advantage in that specific test.

Q: How does the single-core performance compare between the two chips?

A: The Xeon leads in single-core as well. In Cinebench R23 single-core, the Xeon scores 355 against the i5's 293, resulting in a 21.2 percent lead. The R20 single-core test shows the same 21.1 percent gap, with scores of 149 and 123 respectively.

Q: Are these processors in the same performance tier overall?

A: Yes, both chips sit at the 23rd percentile among all CPUs. The Xeon's average benchmark score is 866, while the i5's is 856, a difference of just 1.2 percent. This places them in essentially the same overall performance bracket.

Q: What are the closest rivals to the Xeon X3460?

A: The Xeon's nearest rival is the Intel Core i7-3540M with an average score of 867, which is 0.1 percent higher. The Intel Atom C5315 scores 871 (0.6 percent higher), while the Intel Core i5-3470T scores 863 (0.3 percent lower) and the Intel Xeon W3520 scores 862 (0.5 percent lower).

Q: What are the closest rivals to the i5-5250U?

A: The i5's nearest rival is the Intel Core i5-2500T with an identical average score of 856. The Intel Core i7-4500U scores 859 (0.4 percent higher), the AMD A8-7650K scores 860 (0.5 percent higher), and the Intel Xeon X5492 scores 852 (0.5 percent lower).

Architecture Differences

The architectural divide between these two processors is substantial. 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 into a 296 mm² die. The i5-5250U uses the Broadwell architecture on the Broadwell-U codename, built on a 14 nm process, with 1,900 million transistors in a much smaller 133 mm² die. The transistor density difference is stark—the newer chip fits more than twice as many transistors into less than half the silicon area.

Core configuration is a major differentiator. The Xeon has four cores and eight threads, while the i5 has two cores and four threads. Both use a 64 KB L1 cache per core and 256 KB L2 cache per core, but the shared L3 cache differs dramatically: the Xeon has 8 MB shared, while the i5 has only 3 MB shared. This larger cache pool on the Xeon helps compensate for its older architecture.

Memory support is similar in type but differs in bandwidth. Both support DDR3 memory on a dual-channel bus, but the Xeon delivers 21.3 GB/s of memory bandwidth while the i5 reaches 29.9 GB/s. The i5's newer memory controller provides a 40 percent bandwidth advantage, which helps offset its lower core count in some workloads.

The Xeon supports ECC memory, a feature absent from the i5. This makes the Xeon suitable for server and workstation environments where data integrity is critical. The i5 instead includes integrated graphics in the form of Intel HD 6000, which the Xeon lacks entirely. This is a meaningful distinction for system builders—the Xeon requires a discrete GPU, while the i5 can drive a display on its own.

PCIe connectivity also differs. The Xeon provides Gen 2 with 16 lanes from the CPU, while the i5 provides Gen 2 with 12 lanes. The Xeon's additional four lanes offer more expansion headroom for add-in cards. The Xeon's socket is Intel Socket 1156, while the i5 uses Intel BGA 1168, which is soldered and not upgradeable. The Xeon's market segment is Server/Workstation, while the i5 targets Mobile.

The Verdict

The data supports a clear choice for each use case. The Intel Xeon X3460 is the better performer in every benchmark test recorded, with a 21.1 percent or greater lead across all Cinebench workloads. Its four cores and eight threads, combined with a 3.47 GHz boost clock and 8 MB of L3 cache, make it the stronger option for multi-threaded applications and for single-threaded tasks that benefit from higher clock speeds.

The Xeon's ECC memory support and larger PCIe lane count (16 versus 12) further cement its position as a workstation or server part. It carries a 95 W TDP, which is high but appropriate for a socketed desktop platform. Its launch MSRP was $316. The Xeon's nearest rivals include the Intel Core i7-3540M, which edges it by 0.1 percent in average score, and the Intel Atom C5315, which is 0.6 percent ahead—both are within a rounding error of the Xeon's performance.

The Intel Core i5-5250U is the lower-performing chip in this comparison, but it serves a completely different purpose. Its 15 W TDP makes it suitable for thin-and-light laptops where power efficiency is paramount. It includes integrated graphics, which the Xeon lacks, and it delivers higher memory bandwidth at 29.9 GB/s. Its launch MSRP was $315. The i5's nearest rival is the Intel Core i5-2500T, which matches its average score exactly, and the Intel Core i7-4500U, which sits just 0.4 percent higher.

For a user building a desktop workstation with a discrete GPU and needing ECC memory or maximum multi-threaded throughput, the Xeon X3460 is the logical pick from the data. For a mobile system where integrated graphics, low power draw, and a compact BGA package are priorities, the i5-5250U is the only viable option of the two. The Xeon's 21.1 percent performance advantage in every tested metric is decisive, but it comes at the cost of a much higher power envelope and the need for external graphics.

Specification Differences

The following specifications differ between the Intel Xeon X3460 and the Intel Core i5-5250U:

• Cores: The Xeon has 4 cores, while the i5 has 2 cores.
• Threads: The Xeon has 8 threads, while the i5 has 4 threads.
• Base Clock: The Xeon runs at 2.80 GHz, while the i5 runs at 1600.00 MHz.
• Boost Clock: The Xeon boosts to 3.47 GHz, while the i5 boosts to 2.70 GHz.
• TDP: The Xeon has a 95 W TDP, while the i5 has a 15 W TDP.
• Socket: The Xeon uses Intel Socket 1156, while the i5 uses Intel BGA 1168.
• Architecture: The Xeon uses Nehalem, while the i5 uses Broadwell.
• Codename: The Xeon uses Lynnfield, while the i5 uses Broadwell-U.
• Process Node: The Xeon is built on 45 nm, while the i5 is built on 14 nm.
• Transistors: The Xeon has 774 million transistors, while the i5 has 1,900 million.
• Die Size: The Xeon has a 296 mm² die, while the i5 has a 133 mm² die.
• L3 Cache: The Xeon has 8 MB shared, while the i5 has 3 MB shared.
• Memory Bandwidth: The Xeon provides 21.3 GB/s, while the i5 provides 29.9 GB/s.
• ECC Memory: The Xeon supports ECC, while the i5 does not.
• PCIe: The Xeon has Gen 2 with 16 lanes, while the i5 has Gen 2 with 12 lanes.
• Integrated Graphics: The Xeon has none, while the i5 includes Intel HD 6000.
• Market Segment: The Xeon targets Server/Workstation, while the i5 targets Mobile.
• Release Date: The Xeon released on 2009-09-07, while the i5 released on 2015-02-28.
• Part Number: The Xeon is SLBJK, while the i5 is SR26C.