AMD Ryzen 5 8400F vs Intel Core 7 251E Comparison

The Verdict

The recorded data places these two processors in different tiers despite both carrying a 65 W TDP. The AMD Ryzen 5 8400F holds an average benchmark score of 25005, placing it in the 77th percentile among all CPUs in the database. The Intel Core 7 251E has no recorded benchmark scores, an average score of 0, and sits in the 50th percentile. For users seeking verified performance data, the AMD processor is the only one with measurable results. The Intel part, with its 24 cores and 32 threads, targets a different workload profile, but the absence of benchmark entries means its real-world standing cannot be confirmed from the database. The AMD Ryzen 5 8400F is the pick for anyone who needs documented, tested performance. The Intel Core 7 251E suits those who require its specific feature set, namely ECC memory support and integrated graphics, and who are willing to accept unverified performance.

Architecture Differences

The AMD Ryzen 5 8400F uses the Zen 4 architecture on the Phoenix codename, built on a 4 nm process at TSMC. It integrates 25,000 million transistors on a 178 mm² die. The Intel Core 7 251E uses the Bartlett Lake codename on a 10 nm process at Intel, with a 257 mm² die size. Intel does not list a transistor count for this part.

Cache structures differ substantially. The AMD part provides 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The Intel part provides 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3. Intel's larger shared cache is consistent with its higher core count.

Memory support splits cleanly. AMD supports only DDR5 with dual-channel access and 83.2 GB/s bandwidth. Intel supports both DDR4 and DDR5, also dual-channel, with 89.6 GB/s bandwidth. Intel additionally supports ECC memory, while AMD does not. The AMD processor offers PCIe Gen 4 with 20 CPU lanes. Intel offers PCIe Gen 5 with 16 CPU lanes. Intel includes UHD Graphics 770 integrated graphics; AMD has no integrated graphics.

The AMD processor has an unlocked multiplier. Intel's multiplier is locked. Both use different sockets: AMD Socket AM5 versus Intel Socket 1700. The AMD part released on 2024-03-31, while Intel's release date is 2025-01-12.

Where Each One Wins

Benchmark wins can only be assessed for the AMD Ryzen 5 8400F because the Intel Core 7 251E has no recorded benchmark entries. The AMD processor's results cover 3DMark, Cinebench, and Passmark suites.

The AMD part demonstrates strong multi-threaded performance in Cinebench R23 with a score of 20851 and a single-core score of 2943. Its 3DMark max threads score reaches 6165. Passmark multithread scores 24389. The data shows balanced scaling from 2 threads (1874 in 3DMark) to 16 threads (6091) and max threads (6165).

For the Intel Core 7 251E, the absence of benchmarks means the database cannot assign any wins. Its specifications suggest capacity for heavy parallel workloads with 24 cores and 32 threads, but no measured data supports a definitive claim. The Intel part also wins on integrated graphics inclusion, ECC support, and memory flexibility with DDR4 and DDR5 compatibility.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core 7 251E boosts to 5.60 GHz, while the AMD Ryzen 5 8400F boosts to 4.70 GHz.

Q: Do both processors support ECC memory?

A: No. The Intel Core 7 251E supports ECC memory, while the AMD Ryzen 5 8400F does not.

Q: Which processor has more cores and threads?

A: The Intel Core 7 251E has 24 cores and 32 threads. The AMD Ryzen 5 8400F has 6 cores and 12 threads.

Q: Does the AMD processor include integrated graphics?

A: No. The AMD Ryzen 5 8400F lists integrated graphics as N/A. The Intel Core 7 251E includes UHD Graphics 770.

Q: Which processor has a higher average benchmark score?

A: The AMD Ryzen 5 8400F has an average benchmark score of 25005. The Intel Core 7 251E has an average score of 0 due to no recorded benchmarks.

Q: Which processor supports PCIe Gen 5?

A: The Intel Core 7 251E supports PCIe Gen 5 with 16 CPU lanes. The AMD Ryzen 5 8400F supports PCIe Gen 4 with 20 CPU lanes.

Head-to-Head Benchmarks

Direct head-to-head comparisons are impossible because the Intel Core 7 251E has no benchmark entries in the database. The head-to-head benchmark array is empty, and neither processor records a win in that category. The analysis therefore relies on the AMD processor's standalone results and its nearest rivals.

The AMD Ryzen 5 8400F's average score of 25005 places it 0.2% above the AMD Ryzen 5 7500F, which scores 24964. It sits 0.3% above the Intel Core i7-11850H at 24935 and 0.4% above the Intel Core i7-13620H at 24911. The AMD EPYC 9474F leads the group with 25103, putting the Ryzen 5 8400F 0.4% behind.

Within its own benchmark suite, the Ryzen 5 8400F shows notable strengths. Cinebench R23 multicore delivers 20851, which is roughly seven times its single-core score of 2943, indicating strong scaling. Passmark integer math reaches 74021, while floating-point math hits 46217. Data compression scores 288158, and data encryption reaches 16646. The extended instructions test scores 22175.

The 3DMark results show thread scaling: 2 threads score 1874, 4 threads score 3563, 8 threads score 5275, 16 threads score 6091, and max threads score 6165. The jump from 8 to 16 threads adds 816 points, while the jump from 16 to max threads adds only 74 points, suggesting the processor reaches its scaling limit near 16 threads.

Cinebench R15 multicore scores 2101 with a single-core score of 296. Cinebench R20 multicore scores 8757 with a single-core score of 1236. These results confirm consistent performance across Cinebench versions.

Passmark single-thread scores 3685, while the find prime numbers test scores 89. Random string sorting reaches 34604, and physics scores 1332. The data shows the AMD processor performs strongest in integer math, data compression, and multi-threaded rendering workloads.

Since the Intel Core 7 251E lacks recorded scores, its nearest rivals list is empty. The database cannot place it relative to any other processor. Its 50th percentile ranking appears to be a default or provisional value, not a measured one. The AMD part's 77th percentile is backed by actual test results.

Specification Differences

The two processors differ across nearly every specification field.

| Specification | AMD Ryzen 5 8400F | Intel Core 7 251E |

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

| Cores | 6 | 24 |

| Threads | 12 | 32 |

| Base clock | 4.20 GHz | 2.10 GHz |

| Boost clock | 4.70 GHz | 5.60 GHz |

| TDP | 65 W | 65 W |

| Socket | AMD Socket AM5 | Intel Socket 1700 |

| Codename | Phoenix | Bartlett Lake |

| Process node | 4 nm | 10 nm |

| Foundry | TSMC | Intel |

| Die size | 178 mm² | 257 mm² |

| Transistors | 25,000 million | Not listed |

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

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

| L3 cache | 16 MB shared | 36 MB shared |

| Memory support | DDR5 | DDR4, DDR5 |

| Memory bandwidth | 83.2 GB/s | 89.6 GB/s |

| ECC memory | No | Yes |

| PCIe | Gen 4, 20 lanes | Gen 5, 16 lanes |

| Integrated graphics | N/A | UHD Graphics 770 |

| Multiplier unlocked | Yes | No |

| Release date | 2024-03-31 | 2025-01-12 |

| Launch MSRP | $170 | $384 |

| Part number | 100-000001591 | SRQDUQ657 |

The AMD part uses a smaller process node, fewer cores, and a higher base clock. The Intel part uses a larger die, more cores, a lower base clock, and a higher boost clock. Intel provides more cache at every level and higher memory bandwidth. AMD provides more PCIe lanes but an older PCIe generation. The launch MSRP values differ by more than two times, with Intel at $384 and AMD at $170.