Intel Core i7-12850HX vs Intel Core Ultra 7 356H Comparison

The Intel Core i7-12850HX and Intel Core Ultra 7 356H represent two distinct philosophies in mobile computing, separated by nearly four years of silicon evolution. The data shows a clear generational shift: the Ultra 7 356H, built on a 3 nm process, secures 15 benchmark wins against the older Alder Lake part’s 2, yet the i7-12850HX holds onto specific strengths that reveal where architecture, rather than raw node advantage, still matters. This comparison is less about a total wipeout and more about understanding which workload types reward the newer Panther Lake design’s efficiency and which ones still favor the older chip’s higher thread count and cache hierarchy.

Where Each One Wins

The benchmark results draw a sharp line between two workload categories. The Intel Core Ultra 7 356H dominates in almost every compute-heavy and single-threaded test, winning 15 of the 17 head-to-head comparisons. Its wins span Cinebench render tests, PassMark’s floating-point math, encryption, extended instructions, prime number finding, physics simulation, and even multithreaded throughput. The data indicates this is the superior processor for almost any task that relies on raw execution speed per core or modern instruction set efficiency.

The Intel Core i7-12850HX, by contrast, wins only two tests, but they are telling. It takes PassMark’s data compression with a score of 365829 against 336177, an 8.8% advantage, and integer math with a 108076 score versus 83111, a commanding 30% lead. These are workload types that historically benefit from higher thread counts and larger shared caches. With 24 threads versus 16, and 25 MB of L3 cache versus 18 MB, the older chip’s design clearly favors these specific parallel integer and compression tasks. For users running compression utilities or integer-heavy processing pipelines, the i7-12850HX remains the more capable option.

Architecture Differences

The architectural gap between these two processors is substantial. The i7-12850HX uses the Alder Lake-HX design on Intel’s 10 nm process, featuring a 215 mm² die. It pairs 16 cores with 24 threads, indicating a hybrid layout of performance and efficiency cores. Its cache structure is notable: 80 KB of L1 per core, 1.25 MB of L2 per core, and 25 MB of shared L3. Memory support includes DDR4 and DDR5, with ECC memory support, and it runs on the Intel BGA 1964 socket. The chip draws a 55 W TDP and includes UHD Graphics 770.

The Core Ultra 7 356H belongs to the Panther Lake generation, built on a 3 nm process, a significant node shrink that explains much of its efficiency and per-clock performance gains. It also has 16 cores but only 16 threads, meaning no hyper-threading, a deliberate design choice that prioritizes single-thread efficiency over parallel thread count. Its cache is different in structure: 192 KB of L1 per core and 2.5 MB of L2 per core, but only 18 MB of shared L3. This larger per-core L1 and L2, combined with a smaller shared pool, suggests a design optimized for fast local data access rather than large shared working sets. It supports DDR5 and LPDDR5X memory with a dual-channel bus and a rated bandwidth of 115.2 GB/s, lacks ECC support, and uses the newer Intel BGA 2540 socket. Its TDP is 25 W, less than half of the i7-12850HX, and it features Intel Xe3 Graphics. The PCIe lane count also differs: the i7-12850HX offers 20 CPU lanes, while the Ultra 7 provides 12.

Head-to-Head Benchmarks

The most dramatic single-threaded gap appears in Cinebench R23 single-core, where the Ultra 7 356H scores 2040 against the i7-12850HX’s 1720.5, a 15.7% advantage. This pattern repeats across all Cinebench versions. In R15 single-core, the margin is 14% (303 vs 260.5), and in R20 single-core, it is 10.3% (1715 vs 1539). The newer chip’s IPC advantage, driven by the 3 nm node and Panther Lake architecture, is consistent and substantial.

Multi-core Cinebench results tell a similar story, albeit with smaller margins. The Ultra 7 wins R15 multi-core with 3055 against 2679 (12.3% ahead), R20 multi-core with 12153 against 10907 (10.3% ahead), and R23 multi-core with 18395 against 16301.5 (11.4% ahead). This is noteworthy because the i7-12850HX has 24 threads versus 16, yet still loses by double digits, underscoring how efficient the newer cores are.

PassMark’s suite reveals the most lopsided result. In the prime number search test, the Ultra 7 scores 327 versus 111, a 66.1% advantage, the largest delta in the entire comparison. Floating-point math also favors the Ultra 7 heavily: 103128 versus 79337, a 23.1% lead. Physics simulation shows a 37.4% gap (2895 vs 1813), and extended instructions are 20.3% better (27898 vs 22227). Data encryption is 19.8% faster (26345 vs 21120), and multithreaded performance is 9.9% higher (33978 vs 30627). Random string sorting is nearly tied, with the Ultra 7 ahead by just 1.6% (40990 vs 40327).

The i7-12850HX’s two victories are the outliers. Its 30% lead in integer math (108076 vs 83111) and 8.8% lead in data compression (365829 vs 336177) are the only areas where the older architecture’s higher thread count and larger L3 cache translate into real-world wins. These are not minor margins; they indicate a fundamental advantage for specific workload types.

FAQ

Q: Why does the Core Ultra 7 356H win so many more benchmarks despite having fewer threads?

A: The data shows the Ultra 7 has a 15.7% lead in Cinebench R23 single-core and a 66.1% lead in prime number search, indicating significantly higher per-core performance. This IPC advantage, enabled by the 3 nm process, more than compensates for its 16 threads versus the i7-12850HX’s 24.

Q: Is the Intel Core i7-12850HX better for any task?

A: Yes. It wins data compression by 8.8% and integer math by 30%. These results suggest its 24 threads and 25 MB of shared L3 cache are better suited for specific parallel integer and compression workloads.

Q: How much more efficient is the Core Ultra 7 356H?

A: The Ultra 7 has a 25 W TDP compared to the i7-12850HX’s 55 W. This lower power draw, combined with higher benchmark scores, indicates a major efficiency improvement per watt.

Q: What is the biggest single performance gap between the two?

A: The largest delta is in PassMark’s find prime numbers test, where the Ultra 7 scores 327 versus 111, a 66.1% advantage. This is followed by a 37.4% lead in physics simulation.

Q: Do they support the same memory and storage?

A: No. The i7-12850HX supports DDR4 and DDR5 with ECC, while the Ultra 7 supports DDR5 and LPDDR5X without ECC. The Ultra 7 has a rated memory bandwidth of 115.2 GB/s, a figure not provided for the older chip.

Q: Which processor has more PCIe lanes?

A: The Intel Core i7-12850HX provides 20 CPU PCIe Gen 5 lanes, while the Core Ultra 7 356H provides 12. This could affect expandability for discrete GPUs or NVMe drives.

The Verdict

The data is unambiguous for most users. The Intel Core Ultra 7 356H is the superior processor in 15 of 17 tests, with wins across every Cinebench iteration, all major PassMark compute tests, and physics simulation. Its smallest win is 1.6% in random string sorting, and its largest is 66.1% in prime number search. It achieves this while drawing 25 W versus 55 W, making it the obvious choice for anyone prioritizing performance per watt, single-thread speed, or modern instruction set efficiency.

However, the Intel Core i7-12850HX is not obsolete. Its 30% lead in integer math and 8.8% lead in data compression are significant margins for those specific workloads. If a user’s primary application is compression-based or relies heavily on integer arithmetic, the older chip’s 24 threads and larger 25 MB L3 cache provide a tangible benefit. It also offers ECC memory support and more PCIe lanes, which are relevant for certain professional or industrial use cases.

The verdict depends on workload. For general productivity, content creation, rendering, and any single-threaded task, the Ultra 7 356H is the clear winner. For specialized integer math and compression pipelines, the i7-12850HX retains a distinct edge. The average benchmark scores reflect this split: the i7-12850HX averages 41779 against the Ultra 7’s 41215, a difference of less than 1.4%, but the distribution of wins is heavily skewed toward the newer chip.

Specification Differences

| Specification | Intel Core i7-12850HX | Intel Core Ultra 7 356H |

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

| Threads | 24 | 16 |

| Base Clock | 2.10 GHz | 1.90 GHz |

| Boost Clock | 4.80 GHz | 4.70 GHz |

| TDP | 55 W | 25 W |

| Process Node | 10 nm | 3 nm |

| Die Size | 215 mm² | Not specified |

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

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

| L3 Cache | 25 MB (shared) | 18 MB (shared) |

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

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

| ECC Memory | Yes | No |

| PCIe Lanes | Gen 5, 20 Lanes (CPU only) | Gen 5, 12 Lanes (CPU only) |

| Integrated Graphics | UHD Graphics 770 | Intel Xe3 Graphics |

| Socket | Intel BGA 1964 | Intel BGA 2540 |

| Architecture | Alder Lake | Panther Lake |

| Release Date | 2022-05-09 | 2026-01-04 |

| Launch MSRP | $428 | Not specified |

| Multiplier Unlocked | Yes | No |