AMD Ryzen 9 7945HX3D vs Intel Core i9-13900T Comparison

The Intel Core i9-13900T and AMD Ryzen 9 7945HX3D are both high-end processors that occupy the 92nd percentile of all CPUs in the database. The Intel part is a desktop chip with 24 cores and 32 threads, while the AMD part is a mobile chip with 16 cores and 32 threads. Benchmark results show a clear split: Intel dominates single-thread performance and one multi-thread test, while AMD wins the majority of multi-thread and data-processing workloads. The overall average benchmark score favors Intel, 61723 to 59641, but the head-to-head record is 10 wins for AMD and 5 for Intel.

Head-to-Head Benchmarks

Intel’s most decisive victory is in Cinebench R23 single-core, where it scores 5155 against AMD’s 1935, a 166.4% advantage. In Cinebench R15 single-core, Intel leads 519 to 311, a 66.9% margin. Intel also wins Cinebench R23 multi-core, 36517 to 32782, an 11.4% lead, and Passmark single-thread, 4177 to 4050, a 3.1% edge. These wins are concentrated in single-thread tests and one modern multi-thread workload.

AMD’s largest win is in Passmark find prime numbers, 446 to 175, a 60.8% advantage. It also leads in extended instructions by 43.2% (52310 vs 29719), physics by 42.2% (4321 vs 2497), and Cinebench R15 multi-core by 34.3% (5600 vs 3680). Other AMD wins include data compression (699988 vs 538254, 23.1% ahead), integer math (201217 vs 157324, 21.8%), multithread (57476 vs 43036, 25.1%), random string sorting (83919 vs 63358, 24.5%), data encryption (42367 vs 34415, 18.8%), and floating point math (121619 vs 108779, 10.6%). The pattern is consistent: AMD takes 10 of 15 head-to-head tests, with particularly large margins in prime number finding, extended instructions, and physics.

The data suggests that AMD’s 128MB L3 cache and 5nm process contribute to its strength in data-heavy and parallel workloads, while Intel’s higher single-thread scores come from its 5.3 GHz boost and Raptor Lake architecture. However, the cause is not directly measured; the recorded scores are the evidence.

The Verdict

Based on the recorded data, the Intel Core i9-13900T is the better choice for workloads that rely on single-thread performance, such as legacy applications or lightly threaded tasks. Its Cinebench R23 single-core score is 166.4% higher than the AMD part, and its Passmark single-thread score is 3.1% higher. For multi-threaded and data-intensive workloads, the AMD Ryzen 9 7945HX3D is the stronger performer, winning 10 of 15 head-to-head tests, including data compression, encryption, and integer math.

The Intel part has a higher average benchmark score overall (61723 vs 59641) and sits in the same 92nd percentile. Its nearest rivals include the Core i9-13900K (delta -0.1%) and Core i9-13900KF (delta -0.2%), while the AMD part is 0.6% behind the Core i9-14900F and 0.8% behind the Ryzen 9 7945HX. The AMD part is a mobile processor with an unlocked multiplier, while the Intel part is a locked desktop chip. Users who need a desktop CPU with strong single-thread performance and a 35W TDP should consider the Intel, while those who prioritize multi-thread throughput and have a mobile platform should look to the AMD.

FAQ

Q: Which processor has higher single-thread performance?

A: Intel wins all single-thread tests: Cinebench R15 single (519 vs 311), Cinebench R23 single (5155 vs 1935), and Passmark single-thread (4177 vs 4050).

Q: Which processor has more cores?

A: Intel has 24 cores, AMD has 16, but both have 32 threads.

Q: Which has more L3 cache?

A: AMD has 128MB shared L3 plus a 64MB 3D V-Cache slice, while Intel has 36MB shared L3.

Q: Which supports DDR4 memory?

A: Intel supports DDR4 and DDR5, AMD supports only DDR5.

Q: Which has a higher boost clock?

A: AMD has 5.4 GHz, Intel has 5.3 GHz.

Q: Which is unlocked?

A: AMD has an unlocked multiplier, Intel is locked.

Specification Differences

| Feature | Intel Core i9-13900T | AMD Ryzen 9 7945HX3D |

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

| Cores | 24 | 16 |

| Threads | 32 | 32 |

| Base clock | 1.1 GHz | 2.3 GHz |

| Boost clock | 5.3 GHz | 5.4 GHz |

| TDP | 35 W | 55 W |

| Socket | Intel Socket 1700 | AMD Socket FL1 |

| Process node | 10 nm | 5 nm |

| Foundry | Intel | TSMC |

| Die size | 257 mm² | 2x 71 mm² |

| Transistors | Not listed | 17,840 million |

| L1 cache (per core) | 80 KB | 64 KB |

| L2 cache (per core) | 2 MB | 1 MB |

| L3 cache (shared) | 36 MB | 128 MB |

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

| Memory support | DDR4, DDR5 | DDR5 only |

| Memory bandwidth | Not listed | 83.2 GB/s |

| PCIe lanes (CPU) | Gen 5, 20 lanes | Gen 5, 28 lanes |

| Integrated graphics | UHD Graphics 770 | Radeon 610M |

| Market segment | Desktop | Mobile |

| Release date | 2023-01-03 | 2023-07-26 |

| Launch MSRP | $549 | Not listed |

| Multiplier unlocked | No | Yes |

| Part number | Not listed | 100-000001086 |

Architecture Differences

The Intel part is built on Intel’s 10nm process (Raptor Lake) with a die size of 257 mm². The AMD part uses TSMC’s 5nm process (Zen 4, Dragon Range) with two 71 mm² dies, totaling 17,840 million transistors. Intel has 24 cores and 32 threads, AMD has 16 cores and 32 threads. Cache configurations differ significantly: Intel provides 80KB L1 and 2MB L2 per core, with 36MB shared L3. AMD provides 64KB L1 and 1MB L2 per core, with 128MB shared L3 plus a 64MB 3D V-Cache slice.

Memory support: Intel supports DDR4 and DDR5, AMD only DDR5. AMD has a higher memory bandwidth of 83.2 GB/s, while Intel’s is not listed. PCIe: Intel has 20 Gen5 lanes, AMD has 28. Integrated graphics: Intel UHD Graphics 770, AMD Radeon 610M. The AMD part is mobile, Intel desktop. AMD has an unlocked multiplier, Intel is locked. AMD’s TDP is 55W, Intel’s is 35W.

Where Each One Wins

Intel wins in single-thread tests: Cinebench R15 single, Cinebench R23 single, and Passmark single-thread. It also wins Cinebench R23 multi-core. AMD wins in all other head-to-head tests: Cinebench R15 multi-core, data compression, data encryption, extended instructions, find prime numbers, floating point math, integer math, multithread, physics, and random string sorting.

Therefore, Intel is suited for applications that are latency-sensitive or lightly threaded, while AMD excels in parallel processing, data manipulation, and physics simulations. The AMD’s larger L3 cache and higher boost clock (5.4 GHz vs 5.3 GHz) may contribute to its multi-thread wins, though the data does not isolate cause. The recorded scores show AMD winning 10 of 15 tests, with the largest margins in prime number finding and extended instructions. For users who need a desktop CPU with strong single-thread performance and a 35W TDP, the Intel part is the clear pick. For those who prioritize multi-thread throughput and have a mobile platform, the AMD part is the better option.