AMD Ryzen 9 7950X3D vs Intel Core Ultra 7 265HX Comparison

The AMD Ryzen 9 7950X3D and Intel Core Ultra 7 265HX represent two very different design philosophies: a desktop flagship with 3D V-Cache versus a mobile processor built for efficiency. The database shows the AMD part holds a higher average benchmark score (65,914 vs. 63,173) and wins 9 of the 15 head-to-head tests, but the Intel chip counters with decisive single-thread and floating-point advantages. Both sit in the 93rd percentile of all CPUs, yet their strengths are almost mirror images.

Head-to-Head Benchmarks

The AMD Ryzen 9 7950X3D dominates the integer-heavy and multi-threaded workloads. Its largest win comes in PassMark integer math, where it scores 214,089 against Intel's 126,954, a 68.6% advantage. Physics is even more lopsided: 5,053 vs. 2,978, a 69.7% lead. Data compression shows a 53.4% gap (784,993 vs. 511,817), and random string sorting is 48.6% higher (92,784 vs. 62,458). Extended instructions also favor AMD by 43.6% (58,515 vs. 40,741), and Cinebench R15 multi-core gives AMD a 45.8% edge (5,974 vs. 4,096). PassMark multithread is 30% higher (62,383 vs. 47,985), data encryption 19.3% higher (47,100 vs. 39,472), and find prime numbers 21.9% higher (495 vs. 406).

The Intel Core Ultra 7 265HX wins the single-thread and floating-point battles. In Cinebench R23 single-core, Intel scores 5,737 against AMD's 2,053, meaning AMD is 64.2% lower. Cinebench R15 single-core shows a 43.6% deficit for AMD (326 vs. 578). PassMark single-thread is closer: 4,500 vs. 4,146, a 7.9% gap. Floating-point math goes to Intel by 19.3% (161,605 vs. 130,403). Notably, Intel also wins Cinebench R23 multi-core, scoring 40,642 vs. 36,291, a 10.7% margin, despite having fewer threads (20 vs. 32). That result suggests Intel's newer architecture and higher single-core efficiency carry over into some multi-threaded rendering tasks.

FAQ

Q: Which CPU has more cores and threads?

A: The AMD Ryzen 9 7950X3D has 16 cores and 32 threads. The Intel Core Ultra 7 265HX has 20 cores but only 20 threads, as it does not support simultaneous multithreading.

Q: Which processor has the higher boost clock?

A: AMD's boost clock is 5.70 GHz, while Intel's is 5.30 GHz. AMD also has a higher base clock at 4.20 GHz vs. 2.60 GHz.

Q: How do the cache sizes compare?

A: AMD has 64 KB L1 per core, 1 MB L2 per core, and 128 MB shared L3, including a 64 MB 3D V-Cache slice. Intel has 192 KB L1 per core, 3 MB L2 per core, and 30 MB shared L3, with no V-Cache.

Q: Which CPU supports ECC memory?

A: AMD supports ECC memory; Intel does not.

Q: What is the memory bandwidth difference?

A: Intel offers 102.4 GB/s, while AMD provides 83.2 GB/s. Both use dual-channel DDR5.

Q: Which processor is designed for mobile devices?

A: The Intel Core Ultra 7 265HX is a mobile part (Intel BGA 2114 socket), while the AMD Ryzen 9 7950X3D is a desktop processor (AMD Socket AM5).

Architecture Differences

The two chips come from different architectural generations and process nodes. AMD uses Zen 4 (codenamed Raphael) built on a 5 nm TSMC process, with a die size of 2x 71 mm² and 17,840 million transistors. Intel uses Arrow Lake-HX on a 3 nm TSMC process, with a single 243 mm² die and 17,800 million transistors. The transistor counts are nearly identical, but the process node and die layout differ substantially.

Cache architecture is a major differentiator. AMD's L3 is 128 MB shared, augmented by a 64 MB 3D V-Cache slice, which explains its strength in data-heavy workloads. Intel's L3 is only 30 MB, but its per-core L1 and L2 are larger: 192 KB and 3 MB per core, respectively, versus AMD's 64 KB and 1 MB. This trade-off favors AMD for large working sets and Intel for per-core latency.

Memory support is similar in type (DDR5, dual-channel) but not in bandwidth: Intel's 102.4 GB/s exceeds AMD's 83.2 GB/s. ECC is available only on AMD. PCIe connectivity also differs: AMD provides Gen 5 with 24 lanes (CPU only), while Intel offers Gen 5 with 20 lanes. Integrated graphics are present on both, but AMD uses Radeon Graphics while Intel uses Arc Xe-LPG Graphics with 64 execution units.

Specification Differences

| Specification | AMD Ryzen 9 7950X3D | Intel Core Ultra 7 265HX |

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

| Cores | 16 | 20 |

| Threads | 32 | 20 |

| Base clock | 4.20 GHz | 2.60 GHz |

| Boost clock | 5.70 GHz | 5.30 GHz |

| TDP | 120 W | 55 W |

| Socket | AMD Socket AM5 | Intel BGA 2114 |

| Process node | 5 nm | 3 nm |

| Transistors | 17,840 million | 17,800 million |

| Die size | 2x 71 mm² | 243 mm² |

| L1 cache | 64 KB (per core) | 192 KB (per core) |

| L2 cache | 1 MB (per core) | 3 MB (per core) |

| L3 cache | 128 MB (shared) | 30 MB (shared) |

| 3D V-Cache | 1x 64 MB slice | None |

| Memory bandwidth | 83.2 GB/s | 102.4 GB/s |

| ECC memory | Yes | No |

| PCIe lanes | Gen 5, 24 lanes | Gen 5, 20 lanes |

| Integrated graphics | Radeon Graphics | Arc Xe-LPG Graphics 64EU |

| Market segment | Desktop | Mobile |

| Release date | 2023-01-03 | 2025-01-12 |

| Launch MSRP | $699 | Not available |

| Part number | 100-000000908 | SRVFH |

Both processors have unlocked multipliers, and both are currently in active production.

The Verdict

The data points to a clear split. The AMD Ryzen 9 7950X3D is the stronger overall performer, with a higher average benchmark score (65,914 vs. 63,173) and more head-to-head wins (9 vs. 6). It excels in integer math, physics, compression, encryption, and multithreaded workloads, making it the better choice for desktop users who run heavy compute tasks. Its 128 MB L3 cache and 3D V-Cache provide a substantial edge in data-intensive applications.

The Intel Core Ultra 7 265HX, however, wins in single-thread performance and floating-point math. Its Cinebench R23 single-core score is 5,737, which is 64.2% higher than AMD's 2,053, and it also takes Cinebench R23 multi-core despite having fewer threads. With a TDP of 55 W versus AMD's 120 W, it is far more power-efficient and is designed for mobile platforms. For users who prioritize single-thread responsiveness, floating-point calculations, or battery-conscious mobile systems, the Intel part is the logical pick.

Where Each One Wins

The AMD Ryzen 9 7950X3D wins in integer-heavy and parallel workloads. PassMark integer math (68.6% higher), physics (69.7% higher), data compression (53.4% higher), random string sorting (48.6% higher), extended instructions (43.6% higher), and multithread (30% higher) all favor AMD. It also leads in data encryption (19.3% higher) and find prime numbers (21.9% higher). Cinebench R15 multi-core is another AMD win, with a 45.8% margin.

The Intel Core Ultra 7 265HX wins in single-thread and floating-point tasks. Cinebench R23 single-core (AMD 64.2% lower), Cinebench R15 single-core (43.6% lower), and PassMark single-thread (7.9% lower) all go to Intel. Floating-point math is also Intel's, with a 19.3% advantage. The Intel chip even takes Cinebench R23 multi-core, beating AMD by 10.7%, which suggests its per-core efficiency can overcome its thread deficit in certain rendering workloads.

In summary, the AMD Ryzen 9 7950X3D is the pick for desktop compute-heavy users, while the Intel Core Ultra 7 265HX suits mobile users and those who need top single-thread or floating-point performance.