CPU Comparison

Where Each One Wins

The AMD EPYC 7643 and Intel Core i3-13100 occupy completely different performance strata, and the benchmark data makes the separation unambiguous. The EPYC 7643 wins all six head-to-head Cinebench comparisons, with every victory coming by a margin of roughly 439% or greater. The most extreme gap is in Cinebench R15 single-core, where the EPYC scores 919 against the i3’s 170, a 440.6% advantage. That is not a typo; the server chip’s single-core result is over five times higher than the desktop chip’s.

The i3-13100’s only statistical claim to relevance is its overall percentile ranking. It sits at the 72nd percentile among all CPUs, while the EPYC 7643 sits at the 73rd. That near-identical percentile, however, masks the fact that the EPYC’s average benchmark score is 18,697 versus the i3’s 18,380. The i3’s average is buoyed by its PassMark results, which the EPYC does not report. In the Cinebench suite alone, the EPYC dominates every metric.

For use-case segmentation, the EPYC 7643 is the clear choice for multi-threaded, server-class workloads. Its 48 cores and 96 threads produce a Cinebench R23 multi-core score of 64,642, which is more than five times the i3’s 11,986. The i3-13100, with 4 cores and 8 threads, is a desktop part designed for single-thread responsiveness and light multitasking. Its PassMark single-thread score of 3,460 is respectable for its class, but it has no Cinebench victories to claim.

The i3’s wins, if any, would come in workloads not covered by the head-to-head list. Its PassMark data compression score of 161,424 and integer math score of 41,313 show that it handles everyday desktop tasks competently. But the EPYC’s absence from those tests means no direct comparison is possible. In the tests where both chips appear, the EPYC is never challenged.

Architecture Differences

The two processors are built on fundamentally different architectures, targeting different market segments. The EPYC 7643 is a Zen 3 part, codenamed Milan, fabricated on TSMC’s 7 nm process. It uses the AMD Socket SP3 platform and is classified as Server/Workstation. The i3-13100 is a Raptor Lake-S desktop chip, built on Intel’s 10 nm process, using Intel Socket 1700.

The core configuration could not be more divergent. The EPYC packs 48 cores and 96 threads, with a base clock of 2.30 GHz and boost clock of 3.60 GHz. The i3 offers 4 cores and 8 threads, with a base clock of 3.40 GHz and boost of 4.50 GHz. The i3’s higher clocks reflect its desktop orientation, but the EPYC’s massive core count overwhelms that advantage in multi-threaded tests.

Cache hierarchies differ substantially. The EPYC has 64 KB of L1 per core, 512 KB of L2 per core, and a shared 256 MB L3 cache. The i3 has 80 KB of L1 per core, 1.25 MB of L2 per core, and only 12 MB of shared L3. The EPYC’s L3 cache is over 21 times larger, which is critical for server workloads with large working sets.

Memory support also splits them. The EPYC uses DDR4 with an eight-channel memory bus and a bandwidth of 204.8 GB/s. The i3 supports both DDR4 and DDR5 but uses a dual-channel bus, and its memory bandwidth is not specified in the data. ECC memory is supported on the EPYC but not on the i3. The EPYC provides 128 PCIe Gen 4 lanes, while the i3 offers 16 PCIe Gen 5 lanes. The i3 includes integrated UHD Graphics 730; the EPYC has no integrated graphics.

The die sizes reflect their purposes. The EPYC uses eight chiplets, each 81 mm², totaling 33,200 million transistors. The i3 is a monolithic 163 mm² die with no transistor count listed. The EPYC’s die area and transistor budget are typical of a high-core-count server part, while the i3’s smaller footprint suits its desktop role.

FAQ

Q: Which CPU has more cores and threads?

A: The AMD EPYC 7643 has 48 cores and 96 threads. The Intel Core i3-13100 has 4 cores and 8 threads.

Q: What is the single-core performance difference in Cinebench R23?

A: The EPYC scores 9,126 in Cinebench R23 single-core, while the i3 scores 1,692. The EPYC leads by 439.4%.

Q: Does the Intel Core i3-13100 support ECC memory?

A: No. The i3-13100 does not support ECC memory. The EPYC 7643 does support ECC memory.

Q: Which processor has a higher boost clock?

A: The Intel Core i3-13100 has a boost clock of 4.50 GHz, higher than the EPYC 7643’s boost clock of 3.60 GHz.

Q: How do their average benchmark scores compare?

A: The EPYC 7643 has an average benchmark score of 18,697, while the i3-13100 has an average of 18,380. The EPYC is higher, but the i3’s nearest rival includes the Intel Core 7 360 with a delta of 0%.

Q: Which CPU has integrated graphics?

A: The Intel Core i3-13100 includes UHD Graphics 730. The AMD EPYC 7643 does not have integrated graphics.

Specification Differences

| Field | AMD EPYC 7643 | Intel Core i3-13100 |

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

| Cores | 48 | 4 |

| Threads | 96 | 8 |

| Base Clock | 2.30 GHz | 3.40 GHz |

| Boost Clock | 3.60 GHz | 4.50 GHz |

| TDP | 225 W | 60 W |

| Socket | AMD Socket SP3 | Intel Socket 1700 |

| Architecture | Zen 3 | Raptor Lake |

| Codename | Milan | Raptor Lake-S |

| Process Node | 7 nm | 10 nm |

| Foundry | TSMC | Intel |

| Die Size | 8x 81 mm² | 163 mm² |

| Transistors | 33,200 million | Not specified |

| 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 specified |

| ECC Memory | Yes | No |

| 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 | 2023-01-03 |

| Launch MSRP | $4995 | $134 |

| Multiplier Unlocked | No | No |

Head-to-Head Benchmarks

The head-to-head data is stark. The AMD EPYC 7643 wins all six benchmarks, with margins ranging from 439.3% to 440.6%. There is no single metric where the Intel Core i3-13100 comes close.

Start with multi-core performance. In Cinebench R15 multi-core, the EPYC scores 6,515 against the i3’s 1,208, a 439.3% lead. The R20 multi-core test shows the same pattern: 27,149 versus 5,034, again a 439.3% delta. In R23 multi-core, the EPYC hits 64,642, while the i3 manages 11,986, with the same 439.3% margin. The consistency of that percentage across all three multi-core tests indicates a fixed performance ratio, driven by the core count difference.

Single-core results tell a similar story, but with slightly larger margins. In Cinebench R15 single-core, the EPYC scores 919 versus 170, a 440.6% lead. R20 single-core shows 3,832 against 710, a 439.7% delta. R23 single-core has the EPYC at 9,126 and the i3 at 1,692, a 439.4% gap. The fact that the EPYC wins single-core tests by over 400% is notable because single-core performance typically favors higher-clocked desktop chips. Here, the i3’s 4.50 GHz boost clock does not compensate for the EPYC’s architectural efficiency and larger cache.

The i3-13100’s PassMark results provide context for its desktop role, but they are not compared head-to-head. Its multithread score is 13,726, its single-thread score is 3,460, and its floating-point math score is 32,325. These numbers show a capable entry-level desktop processor, but they do not alter the head-to-head outcome.

The EPYC 7643’s wins are absolute. Every benchmark in the head-to-head list goes to the AMD part, with no exceptions. The i3-13100’s zero wins in this comparison reflect its positioning as a low-power, budget desktop chip against a high-core-count server processor. The data does not support any scenario where the i3 outperforms the EPYC in Cinebench workloads.

For buyers, the choice is straightforward. The EPYC 7643 is for server and workstation environments where multi-threaded throughput and memory bandwidth (204.8 GB/s) matter. The i3-13100 is for desktop builds where its 60 W TDP and integrated graphics make it an efficient, compact option. The benchmark data confirms that these are not competitors; they are tools for different jobs.