AMD Ryzen 7 9850X3D vs Intel Core Ultra 7 366H Comparison

AMD Ryzen 7 9850X3D and Intel Core Ultra 7 366H represent two very different approaches to CPU design: one is a high-power desktop processor built for maximum multi-threaded throughput, while the other is a low-power mobile chip optimized for single-core efficiency and integrated graphics. The recorded data shows a clear split in benchmark dominance, with the AMD part winning 10 of 15 head-to-head tests and the Intel part taking 5.

Where Each One Wins

The AMD Ryzen 7 9850X3D dominates in most PassMark workloads, particularly those that stress integer math, compression, and physics calculations. It wins PassMark integer math by 47.1%, data compression by 44.9%, physics by 44.8%, extended instructions by 46%, and find prime numbers by 33.4%. These are classic CPU-heavy tasks where raw core count and cache size matter more than clock speed.

The Intel Core Ultra 7 366H wins in Cinebench single-core tests by a wide margin, taking R15 single-core by 15.3% and R23 single-core by 44.6%. It also wins Cinebench R23 multi-core by 19.9%, a surprising result given its much lower TDP, and PassMark floating-point math by 20.9%. The Intel chip also edges out the AMD part in data encryption by 11.6%, which suggests its architecture handles certain cryptographic workloads more efficiently.

The use-case split is clear: the AMD processor is the choice for integer-heavy, compression, and physics-based workloads, while the Intel processor excels in single-threaded tasks, floating-point math, and encryption. The AMD chip also wins the overall PassMark single-thread test by 16.3%, which contrasts sharply with its Cinebench single-core losses.

Architecture Differences

The two processors differ fundamentally in their construction. The AMD Ryzen 7 9850X3D uses the Zen 5 architecture on a 4 nm TSMC process, with a 70.6 mm² die size and 8,315 million transistors. It has 8 cores and 16 threads, with a base clock of 4.70 GHz and a boost clock of 5.60 GHz. Its TDP is 120 watts, and it sits in an AMD Socket AM5 with 24 PCIe Gen 5 lanes.

The Intel Core Ultra 7 366H uses the Panther Lake architecture on a 3 nm Intel process. It has 16 cores and 16 threads, meaning it relies on a hybrid layout without hyper-threading. Its base clock is 2.00 GHz and boost clock is 4.80 GHz. The TDP is just 25 watts, a fraction of the AMD part's power envelope. It uses Intel BGA 2540 and has 12 PCIe Gen 5 lanes.

Cache configurations diverge sharply. The AMD chip provides 80 KB L1 per core, 1 MB L2 per core, and 96 MB shared L3, a massive pool for its 8 cores. The Intel chip offers 192 KB L1 per core, 2.5 MB L2 per core, but only 18 MB shared L3. The AMD part's 96 MB L3 is 5.3 times larger than Intel's 18 MB, which explains its dominance in cache-sensitive workloads like compression and integer math.

Memory support also differs. Both support DDR5, but Intel adds LPDDR5X and achieves 115.2 GB/s memory bandwidth versus AMD's 89.6 GB/s. AMD supports ECC memory; Intel does not. The AMD processor has an unlocked multiplier, while the Intel part is locked. Integrated graphics differ as well: AMD uses Radeon Graphics, Intel uses Intel Xe3 Graphics.

Head-to-Head Benchmarks

The largest single victory for the AMD Ryzen 7 9850X3D comes in PassMark integer math, where it scores 123,140 against Intel's 83,695, a 47.1% advantage. Data compression shows a similar story: AMD scores 474,501 versus Intel's 327,455, a 44.9% gap. Extended instructions favor AMD by 46%, with scores of 39,272 versus 26,901. Physics tests show AMD winning 4,171 to 2,880, a 44.8% lead. PassMark multithread gives AMD a 23.6% win, scoring 41,318 versus 33,429.

The Intel Core Ultra 7 366H posts its biggest win in Cinebench R23 single-core, scoring 4,020 versus AMD's 2,228, a 44.6% margin. That is an enormous single-thread advantage and suggests the Intel architecture extracts far more instructions per clock at lower power. Cinebench R23 multi-core also goes to Intel, 28,477 versus 22,807, a 19.9% lead. Cinebench R15 single-core favors Intel by 15.3%, scoring 405 versus 343. Floating-point math goes to Intel 103,615 versus 81,998, a 20.9% win. Data encryption also favors Intel, 25,845 versus 22,856, an 11.6% edge.

The AMD part wins Cinebench R15 multi-core by 23.7%, scoring 3,551 versus 2,870. It also takes PassMark single-thread by 16.3%, scoring 4,704 versus 4,043, and random string sorting by 25%, scoring 49,764 versus 39,814. Find prime numbers goes to AMD 435 versus 326, a 33.4% win.

The pattern is consistent: Intel wins heavily in Cinebench single-core and R23 multi-core, while AMD wins almost everything else. The R23 multi-core result is notable because AMD wins R15 multi-core by 23.7% but loses R23 multi-core by 19.9%, indicating the workloads scale differently across Cinebench versions.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra 7 366H has 16 cores, double the AMD Ryzen 7 9850X3D's 8 cores. Both have 16 threads.

Q: Why does the AMD chip win PassMark multithread if Intel has more cores?

A: The AMD part scores 41,318 versus Intel's 33,429 in PassMark multithread, a 23.6% lead. This despite Intel having 16 cores suggests AMD's higher clock speed (5.60 GHz boost versus 4.80 GHz) and much larger L3 cache (96 MB versus 18 MB) compensate for the core count difference.

Q: What explains Intel's massive Cinebench R23 single-core win?

A: Intel scores 4,020 versus AMD's 2,228, a 44.6% margin. The Intel chip's architecture appears far more efficient per clock in single-threaded rendering tasks, despite its lower 4.80 GHz boost clock versus AMD's 5.60 GHz.

Q: How do the memory systems compare?

A: Intel supports both DDR5 and LPDDR5X with 115.2 GB/s bandwidth. AMD supports only DDR5 with 89.6 GB/s. AMD adds ECC memory support, which Intel lacks.

Q: Which processor has the larger L3 cache?

A: The AMD Ryzen 7 9850X3D has 96 MB shared L3, versus Intel's 18 MB shared L3, a 5.3x difference.

Q: What is the power consumption difference?

A: The AMD chip has a 120 watt TDP, while the Intel chip has a 25 watt TDP. The Intel part delivers competitive or better performance in several workloads while drawing a fraction of the power.

Specification Differences

| Specification | AMD Ryzen 7 9850X3D | Intel Core Ultra 7 366H |

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

| Cores | 8 | 16 |

| Threads | 16 | 16 |

| Base Clock | 4.70 GHz | 2.00 GHz |

| Boost Clock | 5.60 GHz | 4.80 GHz |

| TDP | 120 W | 25 W |

| Socket | AMD Socket AM5 | Intel BGA 2540 |

| Architecture | Zen 5 | Panther Lake |

| Process Node | 4 nm (TSMC) | 3 nm (Intel) |

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

| L2 Cache | 1 MB per core | 2.5 MB per core |

| L3 Cache | 96 MB shared | 18 MB shared |

| Memory Support | DDR5 | DDR5, LPDDR5X |

| Memory Bandwidth | 89.6 GB/s | 115.2 GB/s |

| ECC Memory | Yes | No |

| PCIe Lanes | 24 Gen 5 | 12 Gen 5 |

| Integrated Graphics | Radeon Graphics | Intel Xe3 Graphics |

| Multiplier Unlocked | Yes | No |

| Market Segment | Desktop | Mobile |

| Release Date | 2026-01-28 | 2026-01-04 |

| Launch MSRP | $499 | (not available) |

The Verdict

The data paints a picture of two processors optimized for entirely different environments. The AMD Ryzen 7 9850X3D is a desktop part with a 120 watt TDP, 96 MB of L3 cache, and a 5.60 GHz boost clock. Its benchmark profile shows strength in integer math, compression, physics, and multithreaded PassMark workloads, with a 47.1% lead in integer math being its standout result. It also holds a 16.3% win in PassMark single-thread, showing it is not merely a multi-core brute.

The Intel Core Ultra 7 366H is a mobile part with a 25 watt TDP, 18 MB L3, and 4.80 GHz boost. Its Cinebench R23 single-core score of 4,020 is 44.6% higher than AMD's, and its R23 multi-core win by 19.9% is remarkable given the power disparity. Floating-point math, encryption, and memory bandwidth also favor Intel.

The choice comes down to workload and platform. For desktop users running integer-heavy, compression, or physics simulations, the AMD part delivers decisively higher scores in 10 of 15 tests. For mobile users or those prioritizing single-threaded rendering, floating-point math, and encryption, the Intel part offers superior performance per watt and wins the more modern Cinebench multi-core test. The AMD processor's 92nd percentile versus all CPUs, compared to Intel's 87th, reflects its higher average benchmark score of 58,386 versus 41,263. The recorded data does not include any thermal or sustained-load measurements, so conclusions about real-world throttling are not possible from this database alone.