Intel Core Ultra 5 125U vs Intel Core Ultra 7 258V Comparison

The Intel Core Ultra 7 258V and Intel Core Ultra 5 125U are both mobile processors from Intel, but they target different priorities. The 258V, built on the Lunar Lake architecture, is a newer design focused on efficiency and single-thread performance. The 125U, from the Meteor Lake generation, offers more physical cores and threads. Benchmark data shows a clear split: the 258V wins 15 of 19 head-to-head tests, while the 125U takes 4. However, the average benchmark scores are very close, with the 125U at 20826 and the 258V at 20454. This indicates that while the 258V dominates in most tasks, the 125U holds its own in specific workloads, making the choice heavily dependent on the intended use case.

The Verdict

The data points to a decisive overall win for the Intel Core Ultra 7 258V. Its 15 benchmark victories against the 125U's 4 are a clear indicator of superior performance in most scenarios. The 258V’s single-thread leadership is its strongest asset, with a 40.7% lead in Geekbench single-core and a 25.6% lead in Cinebench R15 single-core. For users whose applications rely heavily on single-threaded speed—such as typical office productivity, web browsing, and many legacy applications—the 258V is the clear choice.

However, the 125U is not without merit. It wins in PassMark integer math, data compression, and random string sorting, with its biggest victory being a 24.8% lead in integer math. This suggests that for specific, highly parallel integer workloads, the 125U’s higher core and thread count provides an advantage. The 125U also has a slightly higher average benchmark score (20826 vs 20454), though this is within a negligible 1.8% margin and likely reflects the impact of its wins in memory-intensive tasks.

The verdict is straightforward: pick the 258V for general-purpose performance, especially if single-threaded responsiveness is a priority. Pick the 125U only if your workflow is dominated by the specific multi-threaded integer operations where it excels, such as certain types of data processing or compression tasks. The 258V’s 47.8% lead in Geekbench multi-core is particularly telling, as this is a broader measure of overall multi-threaded capability.

Where Each One Wins

The benchmark results reveal a clear division of labor. The 258V excels in nearly every category, but its most significant wins are in single-thread and floating-point workloads. It leads by 40.7% in Geekbench single-core, 38.8% in PassMark floating-point math, and 29.8% in PassMark extended instructions. These results indicate a substantial advantage in tasks like scientific computing, 3D rendering, and any application that benefits from strong per-core efficiency.

The 258V also dominates in multi-threaded tests that are not purely integer-based, such as Geekbench multi-core (47.8% ahead) and Cinebench R20 multi-core (12.7% ahead). This suggests that its architectural efficiency, despite having fewer cores (8 vs 12) and threads (8 vs 14), allows it to outperform the 125U in general multi-core workloads. It also wins in PassMark physics, with a 44.6% lead, which is relevant for gaming physics simulations.

The 125U’s wins are concentrated in memory-related and integer-heavy tasks. Its 11.1% lead in data compression and 1.3% lead in random string sorting suggest a potential advantage in memory bandwidth utilization for these specific operations. Its biggest win, a 24.8% lead in integer math, indicates that its 12 cores and 14 threads can be fully utilized in raw integer arithmetic. These wins point to a specific use case: server-like or data-processing workloads where massive parallel integer throughput is more important than single-thread speed or floating-point performance.

Architecture Differences

The two processors come from different architectural generations, which explains their performance profiles. The 258V is built on the Lunar Lake architecture using a 3 nm process node from TSMC. The 125U uses the Meteor Lake architecture on a 7 nm node from Intel. This process difference is a likely contributor to the 258V’s superior efficiency and higher clock speeds.

Core configurations differ significantly. The 258V has 8 cores and 8 threads, with no hyperthreading. The 125U has 12 cores and 14 threads, indicating a hybrid layout with some cores supporting hyperthreading. The 258V compensates with a higher boost clock of 4.80 GHz compared to the 125U’s 4.30 GHz. Base clocks are listed oddly for the 125U, but the boost clock is the more relevant figure for peak performance.

Cache hierarchies also differ. The 258V has 192 KB of L1 cache per core and 2.5 MB of L2 per core, while the 125U has 112 KB of L1 and 2 MB of L2 per core. Both share 12 MB of L3 cache. The larger per-core cache on the 258V likely contributes to its single-thread performance advantage.

Memory support is another major differentiator. The 258V supports LPDDR5X memory with a bandwidth of 136.5 GB/s. The 125U supports DDR5 (dependent on motherboard) with a bandwidth of 89.6 GB/s. The 258V’s memory bandwidth is 52.3% higher, which is a significant factor in its performance wins. The 258V also uses a newer PCIe interface (Gen 5, 4 lanes) compared to the 125U (Gen 4, 12 lanes).

The integrated graphics differ as well: the 258V features Arc 140V graphics, while the 125U has Arc Xe-LPG 64EU. The 258V has a TDP of 17W, slightly higher than the 125U’s 15W, despite being on a more advanced process node.

FAQ

Q: Which CPU has better single-core performance?

A: The Intel Core Ultra 7 258V is significantly better in single-core tests. It leads by 25.6% in Cinebench R15 single-core, 19.9% in Cinebench R23 single-core, 40.7% in Geekbench single-core, and 21.9% in PassMark single-thread.

Q: Does the Core Ultra 5 125U win in any benchmarks?

A: Yes, the 125U wins in 4 out of 19 head-to-head tests. Its victories include PassMark integer math (24.8% ahead), PassMark data compression (11.1% ahead), PassMark random string sorting (1.3% ahead), and Cinebench R15 multi-core (2.7% ahead).

Q: How does the multi-core performance compare?

A: The 258V wins most multi-core tests despite having fewer cores and threads. It leads by 47.8% in Geekbench multi-core, 12.7% in Cinebench R20 multi-core, and 5.1% in Cinebench R23 multi-core. The 125U only wins in Cinebench R15 multi-core by 2.7%.

Q: What are the architectural differences between the two?

A: The 258V uses Lunar Lake architecture on a 3 nm TSMC process, while the 125U uses Meteor Lake on a 7 nm Intel process. The 258V has 8 cores and 8 threads, while the 125U has 12 cores and 14 threads. The 258V has higher memory bandwidth (136.5 GB/s vs 89.6 GB/s).

Q: Which CPU has a higher boost clock?

A: The 258V has a boost clock of 4.80 GHz, while the 125U boosts to 4.30 GHz. This contributes to the 258V’s single-thread performance advantage.

Q: What is the average benchmark score for each?

A: The 258V has an average benchmark score of 20454, while the 125U has a slightly higher average of 20826. Both are in the 74th percentile of all CPUs.

Head-to-Head Benchmarks

The most dramatic victory for the 258V comes in PassMark find prime numbers, where it scores 185 versus the 125U’s 64, a massive 189.1% lead. This is a pure integer test, and the 258V’s superior per-core efficiency is clear. Similarly, in Geekbench multi-core, the 258V scores 9325 against the 125U’s 6308, a 47.8% advantage. This is the largest multi-core delta and suggests that the 258V’s architecture handles parallel workloads much more efficiently.

The 258V also shows strong single-core dominance. In Geekbench single-core, it scores 2100 versus 1493, a 40.7% lead. Cinebench R23 single-core shows a 19.9% lead (1872 vs 1561), and Cinebench R15 single-core is 25.6% ahead (285 vs 227). These results consistently point to a major IPC (instructions per clock) advantage for the Lunar Lake design.

In floating-point operations, the 258V is also superior. PassMark floating-point math shows the 258V at 57372 versus 41331, a 38.8% lead. PassMark extended instructions, which includes SIMD workloads, is 29.8% ahead (14717 vs 11340). PassMark physics is 44.6% higher (1565 vs 1082), which is relevant for gaming and simulation workloads.

The 125U’s wins, while fewer, are still notable. Its biggest victory is in PassMark integer math, scoring 57046 versus the 258V’s 42889, a 24.8% lead. This is a significant delta and shows that for raw integer arithmetic across many threads, the 125U’s 12 cores can be leveraged effectively. In PassMark data compression, the 125U scores 198858 versus 176686, an 11.1% lead. Random string sorting is close, with the 125U winning by 1.3% (21872 vs 21580). The 125U also narrowly wins Cinebench R15 multi-core by 2.7% (1640 vs 1596.5).

The overall pattern is clear. The 258V wins by large margins in most tests, with its smallest wins being 5.1% (Cinebench R23 multi-core) and 8.4% (PassMark multithread). The 125U’s wins are either narrow (1.3% and 2.7%) or highly specific (11.1% in data compression, 24.8% in integer math). The 258V’s 47.8% lead in Geekbench multi-core is particularly striking, as it demonstrates that architectural efficiency can overcome a core-count disadvantage in many scenarios. For users seeking a balanced, high-performance mobile processor, the 258V is the data-backed choice.