Intel Core 5 315 vs Intel Core Ultra 3 205 Comparison

Where Each One Wins

The benchmark data delivers a decisive and one-sided picture: the Intel Core Ultra 3 205 wins all 17 recorded head-to-head comparisons. The Intel Core 5 315 does not register a single victory in any of the Cinebench or PassMark workloads tracked in the database. This is not a close contest with trade-offs; the Ultra 3 205 is consistently faster across every metric, from single-thread responsiveness to heavily threaded rendering.

The most significant separation appears in multithreaded workloads. In Cinebench R23 multicore, the Ultra 3 205 scores 19,856 versus 12,981 for the Core 5 315, a 34.6% advantage. PassMark multithread shows a similar gap, with the Ultra 3 205 at 26,167 and the Core 5 315 at 15,272, a 41.6% difference. The Ultra 3 205 also dominates in integer math (54,755 vs 31,690, a 42.1% lead) and floating-point math (75,136 vs 42,441, a 43.5% lead). These are workloads where core count, cache size, and memory bandwidth matter, and the Ultra 3 205 has advantages in all three.

The single-thread picture is closer but still favors the Ultra 3 205. PassMark single-thread scores are 4,575 for the Ultra 3 205 against 4,021 for the Core 5 315, a 12.1% lead. The Cinebench R23 single-core gap is larger, 2,803 versus 1,832, a 34.6% difference. The Ultra 3 205's higher boost clock and newer architecture explain the edge.

There is no use case in the recorded data where the Core 5 315 competes. Its best relative showing is single-thread PassMark, where the deficit is only 12.1%, but even there the Ultra 3 205 remains ahead. The only area where the two look comparable is in the nearest-rival context: the Core 5 315 sits at the 72nd percentile among all CPUs, while the Ultra 3 205 reaches the 82nd percentile. That 10-percentile gap reflects the average benchmark score difference, 18,188 against 31,473.

Architecture Differences

Both processors are built on a 3 nm process node, but they diverge sharply in nearly every other architectural trait. The Intel Core 5 315 uses Intel's own foundry, while the Intel Core Ultra 3 205 is fabricated by TSMC. The Core 5 315 belongs to the Wildcat Lake codename family, part of the Core 5 generation. The Ultra 3 205 uses the Arrow Lake-S codename, sits in the Core Ultra Series 2 lineup, and carries the Arrow Lake architecture designation.

The core counts differ meaningfully. The Core 5 315 has 6 cores and 6 threads, with no hyperthreading. The Ultra 3 205 has 8 cores and 8 threads, also without hyperthreading. This 2-core advantage directly contributes to the multicore performance gap. Clock speeds favor the Ultra 3 205 as well: its base clock is 3.80 GHz versus 1.50 GHz, and its boost clock is 4.90 GHz versus 4.40 GHz.

Cache hierarchies are substantially different. The Core 5 315 has 192 KB of L1 cache, 2.5 MB of L2, and 6 MB of shared L3 cache. The Ultra 3 205 lists L1 as 192 KB per core, L2 as 3 MB per core, and 15 MB of shared L3 cache. The L3 capacity alone is 2.5 times larger on the Ultra 3 205, which helps with data-heavy workloads. The Ultra 3 205 also carries a much larger transistor count at 17,800 million and a die size of 243 mm², figures not recorded for the Core 5 315.

Memory support separates the two as well. The Core 5 315 supports DDR5 and LPDDR5X over a single-channel memory bus with 59.7 GB/s of bandwidth. The Ultra 3 205 supports only DDR5 but uses a dual-channel bus with 102.4 GB/s, nearly 72% more memory bandwidth. PCIe connectivity also differs: the Core 5 315 offers Gen 4 with 6 lanes, while the Ultra 3 205 provides Gen 5 with 20 lanes.

Integrated graphics are distinct. The Core 5 315 uses Intel Xe3 Graphics with 2 Xe cores. The Ultra 3 205 uses Arc Xe-LPG Graphics with 16 execution units. Neither supports ECC memory. The Core 5 315 is a mobile part on Intel BGA 1516, while the Ultra 3 205 is a desktop part on Intel Socket 1851. The Core 5 315 launched April 15, 2026, and the Ultra 3 205 launched July 31, 2025.

Head-to-Head Benchmarks

The data shows the Ultra 3 205 winning every recorded test, with deltas ranging from 12.1% to 58.2%. The single-thread PassMark test is the closest contest. The Ultra 3 205 scores 4,575 against 4,021, a 12.1% margin. This indicates that in lightly threaded tasks, the Core 5 315 is not completely outclassed, but the Ultra 3 205 still holds a clear lead.

The largest single delta appears in PassMark find prime numbers. The Ultra 3 205 scores 268 versus 112, a 58.2% advantage. This workload is highly sensitive to integer execution efficiency and clock speed, both of which favor the Ultra 3 205. PassMark extended instructions shows a 41.8% gap, with the Ultra 3 205 at 22,578 and the Core 5 315 at 13,143.

Cinebench results are remarkably consistent in their deltas. The R15, R20, and R23 multicore tests all show roughly 34.6% advantages for the Ultra 3 205. The single-core variants of those tests show similar deltas around 34.6% to 34.8%. The consistency across Cinebench versions indicates a stable architectural advantage rather than workload-specific variance.

PassMark multithread shows a 41.6% gap, with the Ultra 3 205 at 26,167 and the Core 5 315 at 15,272. PassMark physics delivers a 42.3% lead for the Ultra 3 205, scoring 2,016 against 1,163. Data compression shows a 43.9% gap, with the Ultra 3 205 at 260,651 and the Core 5 315 at 146,143. Data encryption is 40.8% faster on the Ultra 3 205, at 18,772 versus 11,119.

The average benchmark score reinforces the overall picture. The Ultra 3 205 averages 31,473 across all tests, while the Core 5 315 averages 18,188. That is a 73% higher average score for the Ultra 3 205. The nearest rivals for each chip confirm the class difference: the Core 5 315 trades blows with the AMD EPYC 9274F, Intel Core i7-9700, Intel Core i7-1365U, and AMD Ryzen 7 5700U, all within 0.1% of its average. The Ultra 3 205 matches the Intel Core 7 240H, AMD Ryzen 9 5980HX, Intel Core Ultra 5 225H, and Intel Core i5-13500, also within 0.1%.

Specification Differences

The two processors differ in every major specification field except process node, ECC support, and unlocked multiplier status. Both use 3 nm silicon, neither supports ECC memory, and neither has an unlocked multiplier.

| Specification | Intel Core 5 315 | Intel Core Ultra 3 205 |

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

| Cores | 6 | 8 |

| Threads | 6 | 8 |

| Base clock | 1.50 GHz | 3.80 GHz |

| Boost clock | 4.40 GHz | 4.90 GHz |

| TDP | 15 W | 57 W |

| Socket | Intel BGA 1516 | Intel Socket 1851 |

| Codename | Wildcat Lake | Arrow Lake-S |

| Foundry | Intel | TSMC |

| L2 cache | 2.5 MB | 3 MB per core |

| L3 cache | 6 MB shared | 15 MB shared |

| Memory support | DDR5, LPDDR5X | DDR5 |

| Memory bus | Single-channel | Dual-channel |

| Memory bandwidth | 59.7 GB/s | 102.4 GB/s |

| PCIe | Gen 4, 6 lanes | Gen 5, 20 lanes |

| Integrated graphics | Intel Xe3 (2 Xe) | Arc Xe-LPG 16EU |

| Market segment | Mobile | Desktop |

| Launch MSRP | $340 | $140 |

The TDP difference is substantial: 15 watts for the Core 5 315 versus 57 watts for the Ultra 3 205. The mobile part is designed for power efficiency, while the desktop part uses its higher power budget for sustained performance. The socket difference (BGA 1516 versus Socket 1851) means the two are not interchangeable in any system. The Core 5 315's memory bandwidth is only 58% of the Ultra 3 205's, which limits memory-bound workloads.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra 3 205 has 8 cores and 8 threads, while the Intel Core 5 315 has 6 cores and 6 threads.

Q: How much faster is the Ultra 3 205 in Cinebench R23 multicore?

A: The Ultra 3 205 scores 19,856 versus 12,981 for the Core 5 315, a 34.6% advantage.

Q: What is the memory bandwidth difference?

A: The Ultra 3 205 provides 102.4 GB/s over a dual-channel bus, while the Core 5 315 provides 59.7 GB/s over a single-channel bus.

Q: Are both processors on the same process node?

A: Yes, both use a 3 nm process node, but the Core 5 315 is fabricated by Intel and the Ultra 3 205 by TSMC.

Q: Which processor has a higher boost clock?

A: The Ultra 3 205 boosts to 4.90 GHz, while the Core 5 315 boosts to 4.40 GHz.

Q: What is the average benchmark score for each?

A: The Ultra 3 205 averages 31,473, and the Core 5 315 averages 18,188.

The Verdict

The recorded data leaves no ambiguity. The Intel Core Ultra 3 205 outperforms the Intel Core 5 315 in every single benchmark, with margins ranging from 12.1% in PassMark single-thread to 58.2% in PassMark find prime numbers. The Ultra 3 205 also carries an 82nd percentile ranking versus 72nd for the Core 5 315, and its average benchmark score is 73% higher.

The Core 5 315 is a mobile processor with a 15-watt TDP, designed for low-power devices. The Ultra 3 205 is a desktop processor with a 57-watt TDP, designed for sustained performance. The architectural advantages of the Ultra 3 205, including 2 more cores, a larger L3 cache (15 MB versus 6 MB), dual-channel memory, and a higher boost clock, all translate directly into the measured performance gaps.

For any workload captured in the database, the Ultra 3 205 is the faster choice. The Core 5 315's only relative strength is its lower power envelope and mobile form factor, but the benchmark data shows no performance scenario where it leads. The launch MSRP of $140 for the Ultra 3 205 versus $340 for the Core 5 315 further reflects the positioning, but the performance data alone is sufficient to guide selection. Users seeking single-thread speed, multithreaded throughput, or memory-heavy compute should take the Ultra 3 205. The Core 5 315 remains an option only where the 15-watt power budget and mobile socket are mandatory requirements.