AMD EPYC 7643 vs Intel Core i3-14100 Comparison

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7643 has 48 cores and 96 threads, while the Intel Core i3-14100 has 4 cores and 8 threads. That is a 12x difference in core count and a 12x difference in thread count.

Q: What are the single-core benchmark results for each processor?

A: In Cinebench R23 single-core, the AMD EPYC 7643 scores 9126, while the Intel Core i3-14100 scores 1809. The EPYC leads by 404.5% in that test. The same pattern appears in Cinebench R20 single-core, where the EPYC scores 3832 versus 759 for the i3, a 404.9% advantage.

Q: How do the two compare in multi-core workloads?

A: The EPYC 7643 dominates multi-core tests. In Cinebench R23 multi-core, it scores 64642 versus 12820 for the i3-14100, a 404.2% lead. In Cinebench R20 multi-core, the scores are 27149 versus 5384, a 404.3% difference.

Q: What is the average benchmark score for each CPU?

A: The AMD EPYC 7643 has an average benchmark score of 18697, while the Intel Core i3-14100 has an average of 18318. The EPYC sits at the 73rd percentile of all CPUs, and the i3 sits at the 72nd percentile.

Q: Do both processors support ECC memory?

A: Yes, both the AMD EPYC 7643 and the Intel Core i3-14100 list ECC memory support as enabled.

Q: What integrated graphics does each processor include?

A: The AMD EPYC 7643 has no integrated graphics. The Intel Core i3-14100 includes UHD Graphics 730.

Architecture Differences

The AMD EPYC 7643 and Intel Core i3-14100 come from opposite ends of the processor spectrum, and their architecture reflects that split. The EPYC 7643 is built on AMD's Zen 3 architecture, codenamed Milan, part of the EPYC 7003 series. It uses a 7 nm process from TSMC and packs 33,200 million transistors across a die layout of 8x 81 mm². The i3-14100 uses Intel's Raptor Lake architecture, specifically Raptor Lake-R, part of the Core 14th Gen family. It is built on a 10 nm process at Intel with a die size of 163 mm².

The gap in core topology is extreme. The EPYC 7643 offers 48 cores and 96 threads, with a base clock of 2.30 GHz and a boost clock of 3.60 GHz. The i3-14100 offers 4 cores and 8 threads, with a base clock of 3.50 GHz and a boost clock of 4.70 GHz. So while the Intel part has higher clocks, it has far fewer physical resources. The EPYC's TDP is 225 watts, versus 60 watts for the i3.

Cache hierarchies differ sharply as well. The EPYC 7643 has 64 KB of L1 cache per core, 512 KB of L2 per core, and a massive 256 MB of shared L3 cache. The i3-14100 has 80 KB of L1 per core, 1.25 MB of L2 per core, and 12 MB of shared L3. The EPYC's shared L3 is more than 21x larger than the i3's.

Memory support also separates the two. The EPYC 7643 uses DDR4 memory across an eight-channel bus, delivering 204.8 GB/s of memory bandwidth. The i3-14100 supports both DDR4 and DDR5 across a dual-channel bus, but no memory bandwidth figure is recorded in the database. The EPYC also offers PCIe Gen 4 with 128 lanes from the CPU, while the i3 offers PCIe Gen 5 with 16 lanes from the CPU.

The socket and market positioning are entirely different. The EPYC 7643 uses AMD Socket SP3 and targets the server/workstation segment. The i3-14100 uses Intel Socket 1700 and targets desktop. The EPYC launched in March 2021 with a launch MSRP of $4995. The i3-14100 launched in January 2024 with a launch MSRP of $134. Neither processor has an unlocked multiplier.

Head-to-Head Benchmarks

The head-to-head data in the database is one-sided. Across six Cinebench tests, the AMD EPYC 7643 wins all six, and the margins are remarkably consistent at roughly 404% to 405%. The Intel Core i3-14100 does not win a single recorded matchup.

In Cinebench R15 multi-core, the EPYC 7643 scores 6515 against 1292 for the i3-14100, a 404.3% advantage. In Cinebench R15 single-core, the EPYC scores 919 against 182, a 404.9% lead. That single-core result is notable because the i3 has a much higher boost clock (4.70 GHz versus 3.60 GHz), yet the EPYC still wins decisively. The database data shows that core count and cache size matter more here than raw clock speed.

Cinebench R20 follows the same pattern. Multi-core: EPYC 27149 versus i3 5384, a 404.3% delta. Single-core: EPYC 3832 versus i3 759, a 404.9% delta. The consistency of the percentage gaps across all six tests suggests the performance difference is structural rather than workload-specific.

Cinebench R23, the most demanding of the three Cinebench versions in the database, shows the EPYC 7643 scoring 64642 in multi-core versus 12820 for the i3-14100, a 404.2% lead. In single-core, the EPYC scores 9126 versus 1809, a 404.5% advantage.

The average benchmark scores tell a similar story, though with a smaller gap. The EPYC 7643 averages 18697, while the i3-14100 averages 18318. That is only about a 2% difference in average score, which reflects the fact that the i3 has additional benchmark data points (Geekbench and PassMark tests) that the EPYC does not have recorded. On the shared Cinebench tests, the EPYC's advantage is overwhelming.

Percentile rankings are close: the EPYC sits at the 73rd percentile of all CPUs, and the i3 sits at the 72nd percentile. That means the i3-14100, despite losing every recorded head-to-head test, still lands near the same overall percentile due to its broader benchmark coverage. The nearest rivals for the EPYC include the Intel Core i5-12400 (average score 18683, 0.1% behind), the Intel Core i7-1355U (18730, 0.2% ahead), the AMD Ryzen AI 5 330 (18811, 0.6% ahead), and the Intel Core i3-14100F (18519, 1% behind). The i3-14100's nearest rivals include the Intel Core 3 305 (18302, 0.1% behind), the Intel Core 5 330 (18345, 0.1% ahead), the Intel Core 7 360 (18374, 0.3% ahead), and the Intel Core i3-13100 (18380, 0.3% ahead).

The Verdict

The data makes the choice straightforward for anyone comparing these two directly. The AMD EPYC 7643 is a server/workstation processor built for high-throughput, multi-threaded workloads. With 48 cores, 96 threads, 256 MB of L3 cache, eight-channel DDR4 memory, and 128 PCIe Gen 4 lanes, it is designed to handle virtualization, database work, and other enterprise tasks that scale with core count and memory bandwidth. Its Cinebench R23 multi-core score of 64642 is roughly 5x the i3-14100's 12820.

The Intel Core i3-14100 is a desktop processor with 4 cores and 8 threads, a 4.70 GHz boost clock, and support for both DDR4 and DDR5. It includes UHD Graphics 730, which the EPYC lacks entirely. For desktop users who need integrated graphics, a lower 60 watt TDP, and a modern socket with PCIe Gen 5, the i3 is the sensible option. Its average benchmark score of 18318 is close to the EPYC's 18697, and its percentile rank of 72 versus 73 shows that in the broader CPU landscape, the two are not as far apart as the Cinebench results might suggest.

But in directly comparable workloads, there is no contest. The EPYC 7643 wins every recorded Cinebench test by over 400%. That margin reflects the fundamental difference in design goals: the EPYC is a 225 watt, 48-core server chip, while the i3 is a 60 watt, 4-core desktop chip. Buyers should pick based on workload. If the task is single-threaded desktop use, light productivity, or media playback with integrated graphics, the i3-14100 covers those needs at a much lower power draw. If the task is heavy multi-threading, server virtualization, or memory-bandwidth-intensive work, the EPYC 7643 is the only one of the two that can deliver.

Specification Differences

| Field | AMD EPYC 7643 | Intel Core i3-14100 |

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

| Series | EPYC 7003 series | Core 14th Gen |

| Cores | 48 | 4 |

| Threads | 96 | 8 |

| Base clock | 2.30 GHz | 3.50 GHz |

| Boost clock | 3.60 GHz | 4.70 GHz |

| TDP | 225 W | 60 W |

| Socket | AMD Socket SP3 | Intel Socket 1700 |

| Architecture | Zen 3 | Raptor Lake |

| Codename | Milan | Raptor Lake-R |

| Process node | 7 nm (TSMC) | 10 nm (Intel) |

| Transistors | 33,200 million | Not listed |

| Die size | 8x 81 mm² | 163 mm² |

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

| L2 cache | 512 KB per core | 1.25 MB per core |

| L3 cache | 256 MB shared | 12 MB shared |

| Memory support | DDR4 | DDR4, DDR5 |

| Memory bus | Eight-channel | Dual-channel |

| Memory bandwidth | 204.8 GB/s | Not listed |

| ECC memory | Yes | Yes |

| PCIe | Gen 4, 128 lanes (CPU only) | Gen 5, 16 lanes (CPU only) |

| Integrated graphics | None | UHD Graphics 730 |

| Market segment | Server/Workstation | Desktop |

| Release date | 2021-03-14 | 2024-01-07 |

| Launch MSRP | $4995 | $134 |

| Multiplier unlocked | No | No |

| Part number | 100-000000326100-100000326WOF | SRMX1 |