AMD Ryzen 9 9900X3D vs Intel Core 7 251E Comparison

Where Each One Wins

The AMD Ryzen 9 9900X3D and Intel Core 7 251E occupy different performance tiers, and the recorded data shows a clear split in where each processor delivers its strengths. The AMD part sits in the 91st percentile among all CPUs in the database, with an average benchmark score of 54,762. The Intel part, by contrast, holds the 50th percentile and has no recorded benchmark scores in the database, which limits direct comparisons to the synthetic suites where the AMD was measured.

For the AMD Ryzen 9 9900X3D, the data indicates dominance across every benchmark category where scores exist. In multi-threaded workloads, the chip delivers strong results: Cinebench R23 multicore reaches 47,737, Geekbench multicore hits 22,884, and PassMark multithread scores 56,154. The 3DMark suite shows a similar pattern, with the 16-thread test scoring 12,490 and the max-thread test reaching 13,795. These figures position the chip as a high-end desktop part suited for heavily threaded rendering, encoding, and simulation tasks.

The Intel Core 7 251E, with 24 cores and 32 threads, appears designed for a different role. It has a 65W TDP versus the AMD's 120W, and it supports both DDR4 and DDR5 memory, suggesting flexibility for systems where power efficiency and memory compatibility matter more than raw throughput. Without benchmark scores in the database, the Intel part's performance can only be inferred from its specifications: a 2.10 GHz base clock, a 5.60 GHz boost clock, and 36 MB of shared L3 cache. Those figures point to a processor that can reach high single-thread boost speeds, but the lack of measured results prevents any definitive statement about its actual performance in the database.

Architecture Differences

The two processors come from different architectural lineages, and the database records several key differences. The AMD Ryzen 9 9900X3D uses the Zen 5 architecture, codenamed Granite Ridge, built on a 4 nm process at TSMC. It integrates 12 cores and 24 threads, with a base clock of 4.40 GHz and a boost clock of 5.50 GHz. The L3 cache sits at 128 MB, a figure that far exceeds the Intel part's 36 MB. The AMD chip uses a dual-chiplet design with two 70.6 mm² dies and a total transistor count of 16,630 million. Its integrated graphics are Radeon Graphics, and it supports DDR5 memory in a dual-channel configuration with 89.6 GB/s bandwidth. The socket is AMD Socket AM5, and the multiplier is unlocked.

The Intel Core 7 251E, codenamed Bartlett Lake, uses a 10 nm process at Intel's own foundry. It has 24 cores and 32 threads, with a base clock of 2.10 GHz and a boost clock of 5.60 GHz. The L1 cache is 80 KB per core, matching the AMD part, but the L2 cache is 2 MB per core, double the AMD's 1 MB per core. The L3 cache is 36 MB shared. The Intel die is significantly larger at 257 mm², and there is no transistor count recorded. It supports both DDR4 and DDR5 memory, also in a dual-channel configuration with 89.6 GB/s bandwidth. Its integrated graphics are UHD Graphics 770, and it uses Intel Socket 1700. The multiplier is locked, meaning overclocking is not available on this part.

The architectural differences are substantial. The AMD chip uses a smaller process node (4 nm versus 10 nm), which typically enables higher transistor density and better power efficiency. The AMD part also has far more L3 cache (128 MB versus 36 MB), a feature that benefits workloads with large working sets. The Intel part counters with more cores (24 versus 12), more threads (32 versus 24), and a higher boost clock (5.60 GHz versus 5.50 GHz). The Intel chip also supports older DDR4 memory, which could be relevant for systems that reuse existing memory modules. The TDP difference is notable: 120W for AMD and 65W for Intel, suggesting the Intel part targets lower-power builds.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251E has 24 cores and 32 threads, while the AMD Ryzen 9 9900X3D has 12 cores and 24 threads.

Q: What is the L3 cache size for each processor?

A: The AMD Ryzen 9 9900X3D has 128 MB of L3 cache, while the Intel Core 7 251E has 36 MB of shared L3 cache.

Q: Which processor supports DDR4 memory?

A: The Intel Core 7 251E supports both DDR4 and DDR5, while the AMD Ryzen 9 9900X3D supports only DDR5.

Q: What are the TDP ratings for the two processors?

A: The AMD Ryzen 9 9900X3D has a TDP of 120W, and the Intel Core 7 251E has a TDP of 65W.

Q: Which processor has a higher boost clock?

A: The Intel Core 7 251E has a boost clock of 5.60 GHz, slightly higher than the AMD Ryzen 9 9900X3D's 5.50 GHz.

Q: Are both processors currently in production?

A: Yes, both the AMD Ryzen 9 9900X3D and the Intel Core 7 251E have an active production status in the database.

Specification Differences

| Field | AMD Ryzen 9 9900X3D | Intel Core 7 251E |

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

| Cores | 12 | 24 |

| Threads | 24 | 32 |

| Base Clock | 4.40 GHz | 2.10 GHz |

| Boost Clock | 5.50 GHz | 5.60 GHz |

| TDP | 120W | 65W |

| Socket | AMD Socket AM5 | Intel Socket 1700 |

| Process Node | 4 nm (TSMC) | 10 nm (Intel) |

| Die Size | 2x 70.6 mm² | 257 mm² |

| Transistors | 16,630 million | Not recorded |

| L2 Cache | 1 MB per core | 2 MB per core |

| L3 Cache | 128 MB | 36 MB shared |

| Memory Support | DDR5 | DDR4, DDR5 |

| Integrated Graphics | Radeon Graphics | UHD Graphics 770 |

| PCIe Lanes | Gen 5, 24 lanes (CPU only) | Gen 5, 16 lanes (CPU only) |

| Multiplier | Unlocked | Locked |

| Launch MSRP | $599 | $384 |

Head-to-Head Benchmarks

The database contains benchmark scores only for the AMD Ryzen 9 9900X3D; the Intel Core 7 251E has no recorded scores. This means a direct numerical comparison across the same tests is not possible from the recorded data. However, the AMD part's scores can be interpreted against its nearest rivals in the database, which include several Intel parts. The AMD's average benchmark score of 54,762 sits 0.6% below the Intel Core Ultra 5 245KF (average score 55,093), 1.3% above the Intel Core Ultra 5 245K (average score 54,053), 2.0% above the Intel Xeon 6505P (average score 53,701), and 2.1% above the Intel Core i7-14700F (average score 53,620).

Looking at the AMD's measured results, the Cinebench R23 multicore score of 47,737 and the Geekbench multicore score of 22,884 indicate strong performance in parallel workloads. The PassMark multithread score of 56,154 reinforces this pattern. In single-threaded tasks, the AMD reaches 6,739 in Cinebench R23 singlecore and 3,041 in Geekbench singlecore, with a PassMark single-thread score of 4,646. The 3DMark suite shows scaling from 2,512 in the 2-thread test to 13,795 in the max-thread test, indicating that the chip continues to gain performance as thread count increases, though the gains taper off beyond 16 threads (12,490 in the 16-thread test versus 13,795 in max threads).

The Intel Core 7 251E, with no benchmark scores, cannot be placed in this comparison directly. Its specification sheet suggests a different design point: 24 cores at a lower base clock, a higher boost clock, and a much larger L2 cache per core. The 65W TDP is nearly half the AMD's 120W, and the support for DDR4 memory could make it a candidate for systems that do not require the latest memory standard. The locked multiplier also indicates a non-overclocking target audience.

The nearest-rival data for the AMD part shows that its performance is tightly clustered with several Intel desktop chips. The 0.6% gap to the Intel Core Ultra 5 245KF is within a small margin, while the 2.1% lead over the Core i7-14700F is more decisive. These deltas indicate that the AMD Ryzen 9 9900X3D competes directly with upper-mid-range Intel parts, and its 91st percentile ranking places it above most CPUs in the database. For the Intel Core 7 251E, the 50th percentile ranking and zero measured scores mean it occupies a lower tier in the recorded data, though its core count and boost clock suggest it could handle multi-threaded workloads if the architecture delivers on those specifications.