AMD EPYC 7543 vs Intel Core i5-9600K Comparison

Where Each One Wins

The recorded data splits this comparison cleanly along workload lines. The AMD EPYC 7543 wins every single benchmark in the head-to-head set, with all six Cinebench tests going its way. The Intel Core i5-9600K does not record a single win in the head-to-head comparisons. This is not a close contest; the EPYC 7543 dominates across both single-core and multi-core tests.

The EPYC 7543 is built for server and workstation workloads. Its 32 cores and 64 threads give it massive parallel throughput, which shows in the multi-core Cinebench results. The i5-9600K, with 6 cores and 6 threads, is a desktop part aimed at mainstream use. The data shows the EPYC 7543 is over 490% ahead in every Cinebench test, meaning the gap is not marginal but fundamental.

The percentile ranking tells a different story for each part. Both CPUs sit at the 69th percentile among all CPUs in the database, but their average benchmark scores differ notably. The EPYC 7543 averages 15477, while the i5-9600K averages 14605. The EPYC 7543 sits within 1.8% of its nearest rivals (like the AMD EPYC 9254 at 15756), while the i5-9600K is within 0.7% of its closest competitor (the AMD Ryzen 5 5500U at 14589). This suggests the i5-9600K is already surrounded by similarly performing parts, whereas the EPYC 7543 has more headroom above its nearest neighbors.

For single-threaded tasks, the EPYC 7543 still wins decisively. Its Cinebench R23 single-core score of 7554 dwarfs the i5-9600K's 1278, a 491.1% advantage. This is notable because the i5-9600K has a higher boost clock (4.60 GHz vs 3.70 GHz). The EPYC 7543's Zen 3 architecture delivers better instruction-level performance despite the lower clock speed.

Architecture Differences

The two processors come from entirely different design philosophies. The EPYC 7543 uses AMD's Zen 3 architecture on a 7 nm TSMC process, codenamed Milan. It is part of the EPYC 7003 series, built for the AMD Socket SP3 platform. The i5-9600K uses Intel's Coffee Lake architecture on a 14 nm process, part of the Core i5 family with Coffee Lake Refresh branding. It fits the Intel Socket 1151.

The transistor count tells the scale story. The EPYC 7543 packs 33,200 million transistors across 8 die chips, each measuring 81 mm². The i5-9600K has no recorded transistor or die size data in the database, but its 14 nm process and 6-core layout indicate a much smaller design.

Cache hierarchies differ sharply. Both have 64 KB of L1 per core, but the EPYC 7543 has 512 KB of L2 per core versus 256 KB per core on the i5-9600K. The L3 cache is the biggest gap: the EPYC 7543 has 256 MB shared L3, while the i5-9600K has only 9 MB shared. That is a 28x difference in L3 capacity, which matters heavily for server workloads with large working sets.

Memory support also diverges. Both use DDR4, but the EPYC 7543 has an eight-channel memory bus with 204.8 GB/s bandwidth, while the i5-9600K has a dual-channel bus with 42.7 GB/s. The EPYC 7543 supports ECC memory; the i5-9600K does not. PCIe connectivity shows the same pattern: the EPYC 7543 offers Gen 4 with 128 lanes, while the i5-9600K has Gen 3 with 16 lanes.

The i5-9600K includes integrated graphics (UHD 630), while the EPYC 7543 has none recorded. The EPYC 7543 is an active production part, while the i5-9600K is end-of-life. The i5-9600K has an unlocked multiplier for overclocking; the EPYC 7543 does not.

Head-to-Head Benchmarks

The Cinebench results show a consistent, almost uniform advantage for the EPYC 7543. In Cinebench R15 multi-core, the EPYC 7543 scores 5393 against the i5-9600K's 912, a delta of 491.3%. Single-core R15 shows 761 versus 128, a 494.5% delta. These are the largest percentage gaps in the set.

Cinebench R20 repeats the pattern. Multi-core: 22473 for the EPYC 7543, 3803 for the i5-9600K, a 490.9% delta. Single-core: 3172 versus 536, a 491.8% delta. Cinebench R23 follows with multi-core at 53509 versus 9055 (490.9%) and single-core at 7554 versus 1278 (491.1%).

The deltas cluster tightly between 490.9% and 494.5%. This uniformity suggests the performance difference is structural, not workload-dependent. The EPYC 7543 does not merely win by having more cores; it also wins single-core tests by a similar margin. The 14 nm vs 7 nm process gap, combined with the Zen 3 microarchitecture, explains why the EPYC 7543's lower clocked cores still deliver far higher per-thread performance.

For context on the i5-9600K's position, its nearest rivals include the AMD Ryzen 5 5500U (avg score 14589, delta 0.1%), the AMD EPYC 7473X (14574, delta 0.2%), and the Intel Xeon 6315P (14574, delta 0.2%). The i5-9600K sits slightly above these parts. The EPYC 7543's rivals include the Intel Core 5 211TE (15370, delta 0.7%), AMD Ryzen 3 7440U (15682, delta -1.3%), and Intel Core i5-11400H (15749, delta -1.7%). The EPYC 7543 underperforms some of these rivals by small margins, but none of them are in the same performance class as the i5-9600K.

Specification Differences

| Specification | AMD EPYC 7543 | Intel Core i5-9600K |

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

| Cores | 32 | 6 |

| Threads | 64 | 6 |

| Base clock | 2.80 GHz | 3.70 GHz |

| Boost clock | 3.70 GHz | 4.60 GHz |

| TDP | 225 W | 95 W |

| Socket | AMD Socket SP3 | Intel Socket 1151 |

| Architecture | Zen 3 | Coffee Lake |

| Codename | Milan | Coffee Lake |

| Process node | 7 nm | 14 nm |

| Foundry | TSMC | Intel |

| L2 cache | 512 KB (per core) | 256 KB (per core) |

| L3 cache | 256 MB (shared) | 9 MB (shared) |

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

| Memory bandwidth | 204.8 GB/s | 42.7 GB/s |

| ECC memory | Yes | No |

| PCIe | Gen 4, 128 lanes | Gen 3, 16 lanes |

| Integrated graphics | None | UHD 630 |

| Market segment | Server/Workstation | Desktop |

| Production status | Active | End-of-life |

| Release date | 2021-03-14 | 2018-10-18 |

| Launch MSRP | $3761 | Not recorded |

| Multiplier unlocked | No | Yes |

The TDP difference is substantial: 225 W for the EPYC 7543 versus 95 W for the i5-9600K. That power budget buys 32 cores, eight-channel memory, and 128 PCIe lanes. The i5-9600K's lower TDP reflects its desktop role, but the data shows the power difference does not translate into any performance advantage.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7543 has 32 cores and 64 threads. The Intel Core i5-9600K has 6 cores and 6 threads.

Q: Is the EPYC 7543 faster in single-core tests?

A: Yes, by a wide margin. In Cinebench R23 single-core, the EPYC 7543 scores 7554 versus 1278 for the i5-9600K, a 491.1% advantage. The same pattern holds across all Cinebench single-core tests.

Q: What is the memory bandwidth difference?

A: The EPYC 7543 has an eight-channel memory bus with 204.8 GB/s bandwidth. The i5-9600K has a dual-channel bus with 42.7 GB/s, roughly one-fifth the bandwidth.

Q: Does either processor support ECC memory?

A: The EPYC 7543 supports ECC memory. The i5-9600K does not.

Q: Which processor has integrated graphics?

A: The Intel Core i5-9600K includes UHD 630 integrated graphics. The AMD EPYC 7543 has no integrated graphics recorded in the database.

Q: What is the PCIe lane count for each?

A: The EPYC 7543 offers Gen 4 with 128 lanes. The i5-9600K offers Gen 3 with 16 lanes.