Intel Atom C5315 vs Intel Core i5-5250U Comparison

Intel Atom C5315 and Intel Core i5-5250U occupy very different corners of the Intel lineup, yet their benchmark averages land within striking distance. The database shows the Atom C5315 wins every recorded head-to-head benchmark, while the Core i5-5250U counters with a lower power envelope and integrated graphics. The result is a split decision based on workload priority, not a clear overall winner.

Where Each One Wins

The Intel Atom C5315 is the clear winner in raw compute throughput. Across all five shared Cinebench tests, it takes the lead with deltas between 21.1% and 22%. The largest margin is in Cinebench R15 multicore, where it scores 255 against 209 for the Core i5-5250U, a 22% advantage. In Cinebench R23 multicore, the Atom posts 2533 versus 2079, again a 21.8% edge. Even in single-core tests, where the Core i5's higher boost clock might be expected to help, the Atom wins: Cinebench R23 single-core shows 357 versus 293, a 21.8% gap. For any workload that scales with sustained CPU execution, the Atom C5315 is the pick.

The Intel Core i5-5250U wins where the Atom cannot compete: integrated graphics and power consumption. The i5-5250U includes Intel HD 6000 graphics, while the Atom C5315 has no integrated graphics at all. The i5-5250U also carries a 15 W TDP, compared to 38 W for the Atom. That makes the Core i5 suited for compact mobile systems that need display output and modest cooling, while the Atom requires a discrete GPU and a more substantial thermal solution. The i5-5250U is also the only one of the two with a Geekbench result in the database, with a multicore score of 1587 and single-core score of 825, though no Atom Geekbench data exists for direct comparison.

Architecture Differences

The two processors come from different design philosophies. The Intel Atom C5315 is built on a 10 nm process under the Parker Ridge codename, part of the Atom (Tremont) generation. It has 4 cores and 4 threads, with a base clock of 2.40 GHz and no boost clock listed. Its cache layout uses 64 KB of L1 per core and 4.5 MB of L2 per module, with no L3 cache. The Core i5-5250U, in contrast, is a 14 nm Broadwell-U part with 2 cores and 4 threads thanks to Hyper-Threading. It runs at a 1.60 GHz base clock and boosts to 2.70 GHz, with 64 KB L1 per core, 256 KB L2 per core, and 3 MB of shared L3 cache.

Memory support splits them further. The Atom C5315 uses DDR4 memory on a dual-channel bus with 38.4 GB/s bandwidth and ECC support, reflecting its server/workstation positioning. The Core i5-5250U uses DDR3, also dual-channel, with 29.9 GB/s bandwidth and no ECC. PCIe connectivity differs as well: the Atom offers Gen 3 with 8 lanes, while the Core i5 provides Gen 2 with 12 lanes. The Atom is an active product released in June 2022 with a launch MSRP of $213. The Core i5 is end-of-life, released in February 2015 with a launch MSRP of $315, and includes 1,900 million transistors on a 133 mm² die. Both are socketed differently, BGA 2106 for the Atom and BGA 1168 for the Core i5, and neither has an unlocked multiplier.

FAQ

Q: Which CPU is faster in multi-threaded workloads?

A: The Intel Atom C5315 wins every multi-core test in the database. In Cinebench R20 multicore, it scores 1063 versus 873 for the Core i5-5250U, a 21.8% advantage. The R23 multicore result shows the same pattern: 2533 versus 2079.

Q: Does the Atom C5315 have integrated graphics?

A: No. The Atom C5315 lists integrated graphics as N/A. The Core i5-5250U includes Intel HD 6000, which means the Atom system requires a separate graphics card for display output.

Q: Which processor supports ECC memory?

A: The Intel Atom C5315 supports ECC memory. The Intel Core i5-5250U does not support ECC. This makes the Atom suitable for reliability-sensitive server or workstation builds.

Q: How do their power requirements compare?

A: The Core i5-5250U has a 15 W TDP, while the Atom C5315 has a 38 W TDP. The Core i5 is the lower-power part, which suits thin-and-light mobile designs, whereas the Atom needs more substantial cooling.

Q: Is the Core i5-5250U still in production?

A: No, the Core i5-5250U is marked as end-of-life in the database. The Atom C5315 is marked as active production.

Q: Which processor has a higher single-core score?

A: The Atom C5315. In Cinebench R23 single-core, it scores 357 versus 293 for the Core i5-5250U, a 21.8% lead. The R20 single-core test shows 149 versus 123, a 21.1% lead.

Specification Differences

| Specification | Intel Atom C5315 | Intel Core i5-5250U |

| --- | --- | --- |

| Cores | 4 | 2 |

| Threads | 4 | 4 |

| Base clock | 2.40 GHz | 1.60 GHz |

| Boost clock | None listed | 2.70 GHz |

| TDP | 38 W | 15 W |

| Socket | Intel BGA 2106 | Intel BGA 1168 |

| Codename | Parker Ridge | Broadwell-U |

| Generation | Atom (Tremont) | Core i5 (Broadwell-U) |

| Process node | 10 nm | 14 nm |

| Transistors | Not listed | 1,900 million |

| Die size | Not listed | 133 mm² |

| L2 cache | 4.5 MB (per module) | 256 KB (per core) |

| L3 cache | None | 3 MB (shared) |

| Memory support | DDR4 | DDR3 |

| Memory bandwidth | 38.4 GB/s | 29.9 GB/s |

| ECC memory | Yes | No |

| PCIe | Gen 3, 8 lanes | Gen 2, 12 lanes |

| Integrated graphics | N/A | Intel HD 6000 |

| Market segment | Server/Workstation | Mobile |

| Production status | Active | End-of-life |

| Release date | June 2022 | February 2015 |

| Launch MSRP | $213 | $315 |

The specification table highlights a core count and clock trade-off. The Atom has double the cores at a higher base clock but no boost, while the Core i5 has fewer cores, a lower base clock, and a 2.70 GHz boost ceiling. Memory generation differs completely, with DDR4 versus DDR3, and the Atom's ECC support is a differentiator for server duty.

Head-to-Head Benchmarks

Every head-to-head benchmark in the database goes to the Intel Atom C5315. The smallest win comes in Cinebench R20 single-core, where the Atom scores 149 against 123, a 21.1% delta. The R15 multicore test gives the Atom 255 against 209, a 22% margin. The R20 multicore result is 1063 versus 873, a 21.8% lead. Cinebench R23 multicore shows 2533 versus 2079, and R23 single-core shows 357 versus 293, both at 21.8%. Across all five tests, the Atom's advantage stays tightly clustered between 21.1% and 22%, indicating consistent architectural superiority in CPU-bound rendering tasks.

The Core i5-5250U has no benchmark wins in the shared tests, but it does have Geekbench results that the Atom lacks. Its Geekbench multicore score is 1587 and single-core is 825. Without a corresponding Atom Geekbench figure, those numbers stand alone. The Atom's overall average benchmark score is 871, while the Core i5's is 856, a small gap that the nearest rival data puts into context. The Atom's closest rival, the AMD Athlon PRO 3045B, scores 872, just 0.1% higher. The Core i5-5250U's closest rival, the Intel Core i5-2500T, matches it exactly at 856. Both processors sit at the 23rd percentile among all CPUs, meaning they occupy similar overall performance tiers despite their different strengths.

The Verdict

Choose the Intel Atom C5315 if the workload is compute-heavy and a discrete GPU is already part of the plan. It beats the Core i5-5250U in every recorded Cinebench test, with margins from 21.1% to 22%, and it brings ECC memory support, DDR4, and Gen 3 PCIe. It is an active product, currently in production, and its server/workstation positioning matches that profile. The 38 W TDP and lack of integrated graphics are the trade-offs, but for a system that already has a graphics card, the Atom delivers more rendering performance per test.

Choose the Intel Core i5-5250U if the build is a low-power mobile system that needs display output without an add-in GPU. Its 15 W TDP is less than half the Atom's, and Intel HD 6000 graphics provide the integrated display path the Atom lacks. It is end-of-life, so it suits legacy or repurposed system builds rather than new server deployments. The lower memory bandwidth and absence of ECC support are acceptable for typical mobile use, but they rule out the Core i5 for reliability-focused server tasks. The data shows the Atom as the faster CPU, but the Core i5 as the more self-contained, low-power package.