Intel Core Ultra 7 356H vs Intel Processor U300L Comparison

Head-to-Head Benchmarks

The Intel Core Ultra 7 356H and the Intel Processor U300L occupy very different positions in the database, and the recorded benchmark data reflects that gap clearly. The Core Ultra 7 356H has a full suite of 17 benchmark results, while the U300L has no recorded benchmark scores at all. This absence of data is itself a significant finding: the U300L cannot be positioned against the 356H on any measured workload, so comparisons must rely on the architectural and specification data available.

The 356H delivers a multi-core Cinebench R23 score of 18395, a single-core R23 score of 2040, and a Cinebench R20 multi-core score of 12153. Its PassMark multi-thread score reaches 33978, with a single-thread score of 4072. The U300L has no comparable entries in the database, so every head-to-head comparison in terms of measured performance is one-sided. The 356H also posts an average benchmark score of 41215, placing it at the 87th percentile among all CPUs in the database. The U300L sits at the 50th percentile with an average score of 0, which indicates that its benchmark profile has not been populated.

The nearest rivals for the 356H provide useful context. The AMD Ryzen AI 5 PRO 440 scores an average of 41208, essentially identical at a delta of 0 percent. The Intel Core Ultra 7 366H scores 41263, a 0.1 percent difference in favor of that chip. The AMD Ryzen 9 5900X scores 41376, 0.4 percent higher, and the Intel Core Ultra X7 358H scores 40967, 0.6 percent lower. These small deltas suggest the 356H is tightly clustered with its immediate competition, but the U300L has no such reference points. The data shows no measured workload where the U300L leads, because no measured workload exists for it.

Where Each One Wins

The 356H wins in every category where data is recorded. Its Cinebench R15 multi-core score of 3055 and single-core score of 303 indicate strong performance in both short and sustained rendering tasks. The R20 results, 12153 multi-core and 1715 single-core, reinforce that pattern. PassMark workloads show particular strengths: data compression at 336177, data encryption at 26345, extended instructions at 27898, floating point math at 103128, and integer math at 83111. The random string sorting score of 40990 and the find prime numbers score of 327 further demonstrate capability across mixed instruction types.

The physics score of 2895 and the single-thread score of 4072 round out the picture. These numbers suggest the 356H handles compute-heavy mobile workloads with consistent results across rendering, encryption, compression, and general arithmetic tasks. The U300L has no recorded wins in any category, so the database cannot confirm any workload where it would outperform the 356H. The specification gap, however, hints at where the U300L might be intended: its lower core count, lower clocks, and smaller cache imply a more limited role, likely for basic productivity rather than intensive parallel work.

The percentile data supports this split. The 356H at the 87th percentile sits well above the median, while the U300L at the 50th percentile is exactly at the midpoint of all CPUs in the database. That difference in percentile ranking suggests the 356H is designed for demanding mobile computing, whereas the U300L targets mainstream or entry-level tasks where moderate performance is sufficient.

Architecture Differences

The two processors come from different architectural lineages. The 356H uses Panther Lake, built on a 3 nm process at Intel's foundry. The U300L uses Raptor Lake, built on a 10 nm process, also at Intel. The node difference is substantial and likely explains much of the efficiency and performance gap. The 356H belongs to the Core Ultra Series 3 generation, specifically the Ultra 7 Panther Lake-H family. The U300L belongs to the Intel Processor generation under the Raptor Lake codename.

Core and thread counts differ sharply. The 356H has 16 cores and 16 threads, all with equal thread allocation. The U300L has 5 cores and 6 threads, indicating a hybrid configuration where one core likely supports an extra thread. The cache hierarchy reflects the core count difference. The 356H has 192 KB of L1 cache per core, 2.5 MB of L2 per core, and 18 MB of shared L3 cache. The U300L has 80 KB of L1 per core, 1.25 MB of L2 per core, and 8 MB of shared L3. The 356H's larger per-core caches and more than double the L3 capacity give it a clear advantage in data-heavy workloads.

Clock speeds also differ. The 356H has a base clock of 1.90 GHz and a boost clock of 4.70 GHz. The U300L has a base clock of 1.20 GHz and a boost clock of 4.40 GHz. The 356H boosts 0.30 GHz higher, and its base clock is 0.70 GHz higher. Power envelopes diverge as well: the 356H has a TDP of 25 watts, while the U300L has a TDP of 15 watts. The 356H uses more power but delivers substantially more compute. Memory support differs too. The 356H supports DDR5 and LPDDR5X, while the U300L supports DDR4 and DDR5. The 356H has a recorded memory bandwidth of 115.2 GB/s, while the U300L has no bandwidth figure in the database. Both use dual-channel memory buses, and neither supports ECC memory.

PCIe capabilities are not equal. The 356H uses Gen 5 with 12 lanes from the CPU, while the U300L uses Gen 4 with 8 lanes. The integrated graphics also differ: the 356H has Intel Xe3 Graphics, while the U300L has UHD Graphics 48EU. The sockets are different as well. The 356H uses Intel BGA 2540, and the U300L uses Intel Socket 1700. Release dates are separated by roughly 21 months, with the 356H launching on 2026-01-04 and the U300L on 2024-04-07. Both are active production parts, and neither has an unlocked multiplier.

FAQ

Q: Why does the Intel Core Ultra 7 356H have more benchmark entries than the Intel Processor U300L?

A: The database records 17 benchmark results for the 356H, including Cinebench R15, R20, R23, and multiple PassMark workloads. The U300L has no recorded benchmark scores, so its average benchmark score is 0 and its percentile is 50.

Q: How does the 356H compare to its nearest rivals in average score?

A: The 356H has an average score of 41215. The AMD Ryzen AI 5 PRO 440 scores 41208 with a delta of 0 percent, the Intel Core Ultra 7 366H scores 41263 with a delta of -0.1 percent, the AMD Ryzen 9 5900X scores 41376 with a delta of -0.4 percent, and the Intel Core Ultra X7 358H scores 40967 with a delta of 0.6 percent.

Q: What is the core and thread difference between the two processors?

A: The 356H has 16 cores and 16 threads. The U300L has 5 cores and 6 threads. The 356H also has more cache per core and a larger shared L3 cache of 18 MB versus 8 MB.

Q: Which processor has higher clock speeds?

A: The 356H has a base clock of 1.90 GHz and a boost clock of 4.70 GHz. The U300L has a base clock of 1.20 GHz and a boost clock of 4.40 GHz.

Q: What memory types does each processor support?

A: The 356H supports DDR5 and LPDDR5X with a memory bandwidth of 115.2 GB/s. The U300L supports DDR4 and DDR5, and its memory bandwidth is not listed in the database.

Q: Are both processors currently in production?

A: Yes, both the 356H and the U300L have an active production status in the database. The 356H was released on 2026-01-04, and the U300L was released on 2024-04-07.

Specification Differences

| Specification | Intel Core Ultra 7 356H | Intel Processor U300L |

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

| Cores | 16 | 5 |

| Threads | 16 | 6 |

| Base Clock | 1.90 GHz | 1.20 GHz |

| Boost Clock | 4.70 GHz | 4.40 GHz |

| TDP | 25 W | 15 W |

| Socket | Intel BGA 2540 | Intel Socket 1700 |

| Architecture | Panther Lake | Raptor Lake |

| Codename | Panther Lake | Raptor Lake-PS |

| Generation | Ultra 7 (Panther Lake-H) | Intel Processor (Raptor Lake) |

| Process Node | 3 nm | 10 nm |

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

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

| L3 Cache | 18 MB (shared) | 8 MB (shared) |

| Memory Support | DDR5, LPDDR5X | DDR4, DDR5 |

| Memory Bandwidth | 115.2 GB/s | Not listed |

| PCIe | Gen 5, 12 Lanes (CPU only) | Gen 4, 8 Lanes (CPU only) |

| Integrated Graphics | Intel Xe3 Graphics | UHD Graphics 48EU |

| Release Date | 2026-01-04 | 2024-04-07 |

| Launch MSRP | Not listed | $107 |

| Part Number | SA4RGQ9EU | SRPEKSRPEM |

The Verdict

The data points to a clear split in intended use. The Intel Core Ultra 7 356H, with 16 cores, 16 threads, a 4.70 GHz boost clock, 18 MB of L3 cache, and a 3 nm process node, is built for sustained multi-threaded mobile workloads. Its benchmark scores confirm this: Cinebench R23 multi-core at 18395, PassMark multi-thread at 33978, and an average score of 41215 at the 87th percentile. The 356H also supports faster memory with a recorded bandwidth of 115.2 GB/s and PCIe Gen 5 with 12 lanes, which suits platforms that need high data throughput.

The Intel Processor U300L is a different class of part. With 5 cores, 6 threads, a 4.40 GHz boost clock, 8 MB of L3 cache, and a 10 nm process node, it targets lighter duties. Its 15 W TDP and support for DDR4 as well as DDR5 give it flexibility in simpler systems. The launch MSRP of $107 positions it as an entry-level mobile processor, though the database does not include any benchmark scores for it. The 50th percentile ranking reflects that absence of measured data rather than a measured performance level.

The architecture gap is decisive. The 356H uses Panther Lake on 3 nm, while the U300L uses Raptor Lake on 10 nm. The 356H has more than three times the cores, more than double the L3 cache, a higher boost clock, and a larger power envelope. The U300L is a lower-power, lower-core-count part for systems that do not need the 356H's compute capacity. Users who need multi-core rendering, encryption, compression, and floating point performance should look to the 356H. Users who need a modest mobile processor with flexible memory support and a smaller footprint should consider the U300L. The recorded data supports the 356H as the stronger performer in every measured category, while the U300L remains a specification-defined option without benchmark validation.