Intel Core i5-13400 vs Intel Core Ultra 7 266V Comparison

Head-to-Head Benchmarks

The benchmark comparison between the Intel Core Ultra 7 266V and the Intel Core i5-13400 reveals a clear split: the desktop chip wins most multi-threaded workloads, while the mobile chip dominates single-thread performance and specific specialized tasks. Out of 17 recorded head-to-head tests, the Core i5-13400 takes 11 wins, while the Core Ultra 7 266V secures 6.

The largest victory for the Core Ultra 7 266V comes in PassMark's find prime numbers test, where it scores 191 against the i5-13400's 74, a staggering 158.1% advantage. This result suggests the Lunar Lake architecture's integer-heavy pipeline handles this particular algorithm far more efficiently. Another notable single-thread win appears in Cinebench R23 single-core, where the Ultra 7 scores 2335 versus 1786, a 30.7% lead. PassMark single-thread also favors the Ultra 7, with 3943 against 3538, an 11.4% margin.

The Core i5-13400 counters with equally decisive wins in other areas. Its most dramatic advantage is in PassMark integer math, scoring 77721 versus 41558, a 46.5% gap. Data compression shows a 38% lead for the i5-13400 (301481 vs 187050), while random string sorting favors the desktop chip by 25.8% (30851 vs 22905). Cinebench R15 multi-core shows the i5-13400 ahead by 29.3% (2358 vs 1667), and Cinebench R20 multi-core shows an 18.5% lead (8526 vs 6948).

Interestingly, the two chips trade places across Cinebench generations. In Cinebench R23 multi-core, the Ultra 7 266V actually wins, scoring 16544 versus 15953, a 3.7% margin. This contrasts sharply with R15 and R20 results, where the i5-13400 leads significantly. The pattern suggests that newer Cinebench versions may favor the Ultra 7's architecture differently, or that thermal and power characteristics play a larger role in longer sustained workloads.

Other wins for the i5-13400 include PassMark data encryption (15880 vs 13822, 13% lead), extended instructions (19161 vs 15928, 16.9% lead), floating point math (58786 vs 56923, 3.2% lead), and multithread overall (23719 vs 19461, 18% lead). The Ultra 7 also takes PassMark physics with 1608 against 1244, a 29.3% advantage.

Where Each One Wins

The data paints a clear picture of workload segmentation. The Core i5-13400 excels in traditional desktop productivity scenarios: integer math, data compression, encryption, and general multithreaded throughput. Its 10 cores and 16 threads provide a structural advantage for parallel workloads that scale well across many execution units. The 46.5% lead in integer math and 38% lead in data compression indicate that content creation, database operations, and compilation tasks would favor the desktop chip.

The Core Ultra 7 266V shows its strength in single-thread responsiveness and specific algorithmic workloads. The 30.7% lead in Cinebench R23 single-core and 11.4% lead in PassMark single-thread suggest that applications relying on per-core performance, such as legacy software, certain games, or interactive workloads, would feel snappier on the Lunar Lake chip. The 158.1% advantage in prime number finding points to a specialized hardware capability, possibly related to the architecture's integer execution units or cryptographic acceleration features.

The physics test result is particularly interesting: the Ultra 7 leads by 29.3% (1608 vs 1244), which may indicate better handling of physics simulation workloads that combine single-thread logic with moderate parallelism. The Cinebench R23 multi-core win for the Ultra 7, despite losing R15 and R20 multi-core, hints that the newer benchmark version may better reflect the chip's sustained performance characteristics under real-world thermal conditions.

Architecture Differences

The two processors come from fundamentally different design philosophies. The Core Ultra 7 266V uses Lunar Lake architecture on a 3 nm process manufactured by TSMC, while the Core i5-13400 uses Raptor Lake architecture on a 10 nm process from Intel's own fabs. This node difference likely explains much of the efficiency and single-thread performance gap.

Core configuration differs substantially: the Ultra 7 has 8 cores and 8 threads, while the i5-13400 has 10 cores and 16 threads. The i5-13400's hyperthreading capability doubles its thread count, which directly contributes to its multi-threaded benchmark wins. Cache hierarchies also diverge: the Ultra 7 has 192 KB L1 per core and 2.5 MB L2 per core, while the i5-13400 has 80 KB L1 per core and 1.25 MB L2 per core. However, the i5-13400 has a larger shared L3 cache at 20 MB versus 12 MB for the Ultra 7.

Memory support differs meaningfully. The Ultra 7 uses LPDDR5X with bandwidth depending on the motherboard, while the i5-13400 supports both DDR4 and DDR5. The Ultra 7 has a recorded memory bandwidth of 136.5 GB/s, while no bandwidth figure exists for the i5-13400. PCIe lanes also diverge: the Ultra 7 offers Gen 5 with 4 lanes (CPU only), while the i5-13400 provides Gen 5 with 16 lanes (CPU only), giving the desktop chip significantly more expansion headroom.

Integrated graphics differ as well: the Ultra 7 features Arc 140V, while the i5-13400 has UHD Graphics 730. Power envelopes are dramatically different, with the Ultra 7 rated at 17 W TDP versus 65 W for the i5-13400, reflecting their mobile and desktop market positions respectively. The Ultra 7 has a boost clock of 5.00 GHz versus 4.60 GHz for the i5-13400, while base clocks are 2.20 GHz and 2.50 GHz respectively.

The Verdict

The data supports clear use-case recommendations. The Intel Core i5-13400 is the right choice for users who prioritize raw multi-threaded throughput: its 18% lead in PassMark multithread, 46.5% lead in integer math, and 38% lead in data compression make it suitable for video encoding, 3D rendering, scientific computing, and heavy multitasking. Its 16 threads and larger 20 MB L3 cache provide a structural advantage for parallel workloads.

The Intel Core Ultra 7 266V is preferable for single-thread-sensitive applications and power-constrained environments. Its 30.7% lead in Cinebench R23 single-core, 11.4% lead in PassMark single-thread, and 158.1% lead in prime number finding make it compelling for interactive workloads, legacy applications, and specialized mathematical tasks. Its 17 W TDP versus 65 W suggests it belongs in thin-and-light laptops where battery life and thermals matter more than absolute throughput.

For users who need both characteristics, the Cinebench R23 multi-core result (16544 vs 15953, 3.7% lead for the Ultra 7) provides an interesting data point: the mobile chip can match or exceed the desktop chip in at least one modern multi-threaded benchmark, suggesting that architectural efficiency can sometimes compensate for fewer threads. However, the overall benchmark average favors the i5-13400: 24280 versus 23297, a 4.2% difference that aligns with its 11 wins versus 6 wins.

FAQ

Q: Which processor has better single-core performance?

A: The Intel Core Ultra 7 266V wins all three single-thread tests: Cinebench R23 single-core (2335 vs 1786, 30.7% lead), PassMark single-thread (3943 vs 3538, 11.4% lead), and Cinebench R15 single-core (235 vs 257, 8.6% deficit, meaning the i5-13400 wins that one). The Ultra 7 dominates in R23, while the i5-13400 wins R15.

Q: How do they compare in multi-core performance?

A: The Core i5-13400 wins most multi-core tests: Cinebench R15 multi-core (2358 vs 1667, 29.3% lead), R20 multi-core (8526 vs 6948, 18.5% lead), and PassMark multithread (23719 vs 19461, 18% lead). However, the Ultra 7 wins Cinebench R23 multi-core (16544 vs 15953, 3.7% lead).

Q: What is the most significant performance difference?

A: The largest gap is in PassMark find prime numbers, where the Ultra 7 scores 191 versus 74 for the i5-13400, a 158.1% advantage. The second-largest is PassMark integer math, where the i5-13400 leads by 46.5% (77721 vs 41558).

Q: Which chip has more cores and threads?

A: The Core i5-13400 has 10 cores and 16 threads, while the Core Ultra 7 266V has 8 cores and 8 threads. The i5-13400's hyperthreading doubles its thread count.

Q: How do their cache configurations differ?

A: The Ultra 7 has larger per-core caches: 192 KB L1 and 2.5 MB L2 per core, versus 80 KB L1 and 1.25 MB L2 per core for the i5-13400. However, the i5-13400 has a larger shared L3 cache at 20 MB versus 12 MB.

Q: Which processor has a higher boost clock?

A: The Ultra 7 has a boost clock of 5.00 GHz, while the i5-13400 boosts to 4.60 GHz. The i5-13400 has a higher base clock at 2.50 GHz versus 2.20 GHz for the Ultra 7.

Specification Differences

| Specification | Intel Core Ultra 7 266V | Intel Core i5-13400 |

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

| Cores | 8 | 10 |

| Threads | 8 | 16 |

| Base Clock | 2.20 GHz | 2.50 GHz |

| Boost Clock | 5.00 GHz | 4.60 GHz |

| TDP | 17 W | 65 W |

| Socket | Intel BGA 2833 | Intel Socket 1700 |

| Architecture | Lunar Lake | Raptor Lake |

| Process Node | 3 nm | 10 nm |

| Foundry | TSMC | Intel |

| Die Size | Not recorded | 215 mm² |

| L1 Cache (per core) | 192 KB | 80 KB |

| L2 Cache (per core) | 2.5 MB | 1.25 MB |

| L3 Cache (shared) | 12 MB | 20 MB |

| Memory Support | LPDDR5X | DDR4, DDR5 |

| Memory Bandwidth | 136.5 GB/s | Not recorded |

| PCIe | Gen 5, 4 Lanes (CPU only) | Gen 5, 16 Lanes (CPU only) |

| Integrated Graphics | Arc 140V | UHD Graphics 730 |

| Market Segment | Mobile | Desktop |

| Release Date | 2024-09-23 | 2023-01-03 |

| Launch MSRP | Not recorded | $221 |