AMD Ryzen 9 5900 vs Intel Core i5-14600K Comparison

FAQ

Q: Which processor takes the overall lead in the recorded benchmark suite?

A: The Intel Core i5-14600K wins 12 of the 17 head-to-head benchmark comparisons, while the AMD Ryzen 9 5900 takes 5. The Intel part also posts a higher average benchmark score of 48,618 versus 46,971 for the AMD, and sits at the 90th percentile of all CPUs compared to the Ryzen's 89th.

Q: Does the AMD Ryzen 9 5900 ever win in multi-core rendering?

A: Yes. In Cinebench R23 multi-core, the Ryzen 9 5900 scores 28,834 against the Intel's 24,491, a 15.1% advantage. However, in the older Cinebench R15 and R20 multi-core tests, the Intel i5-14600K leads by 25.3% and 13.2% respectively.

Q: How do the two compare in single-core performance?

A: The results are split by test generation. In Cinebench R15 single-core, the AMD wins with a 27.6% margin (410 vs 297). In Cinebench R20 single-core, the Intel wins by 13.2% (1935 vs 1709). In Cinebench R23 single-core, the AMD posts a massive 49.3% lead (4070 vs 2064). PassMark single-thread favors the Intel at 4270 vs 3439, a 24.2% margin.

Q: Which processor has more cores and threads?

A: The Intel Core i5-14600K has 14 cores and 20 threads. The AMD Ryzen 9 5900 has 12 cores and 24 threads. So the Intel has more physical cores, while the AMD has more threads thanks to simultaneous multithreading on all 12 of its cores.

Q: What are the process node and foundry differences?

A: The Intel Core i5-14600K is built on Intel's 10 nm process at Intel's own foundry. The AMD Ryzen 9 5900 uses TSMC's 7 nm process. The AMD die consists of two 74 mm² chiplets with 8,300 million total transistors, while the Intel part uses a single 257 mm² monolithic die.

Q: Do both processors support ECC memory?

A: Yes, both list ECC memory support as true. The Intel supports both DDR4 and DDR5 memory, while the AMD is limited to DDR4. The AMD has a published memory bandwidth of 51.2 GB/s, while the Intel entry does not list a bandwidth figure.

Architecture Differences

The Intel Core i5-14600K belongs to the Raptor Lake-R generation, part of Intel's Core 14th Gen lineup, and uses the Raptor Lake architecture. It is built on Intel's 10 nm process at Intel's own foundry, with a monolithic die measuring 257 mm². The AMD Ryzen 9 5900 is a Zen 3 part from the 5000 series, codenamed Vermeer, manufactured by TSMC on a 7 nm process. Its physical design is fundamentally different: two 74 mm² chiplets containing a combined 8,300 million transistors.

The core configurations reflect different design philosophies. The Intel part offers 14 cores and 20 threads. The AMD part offers 12 cores and 24 threads. The Intel processor therefore has two more physical cores, while the AMD processor has four more threads, indicating that all 12 AMD cores support simultaneous multithreading while only 6 of the Intel cores do. The Intel base clock is 3.50 GHz with a boost of 5.30 GHz. The AMD runs at a lower 3.00 GHz base and 4.70 GHz boost.

Cache hierarchies also differ substantially. The Intel Core i5-14600K has 80 KB of L1 cache per core, 2 MB of L2 per core, and 24 MB of shared L3 cache. The AMD Ryzen 9 5900 has a smaller 64 KB L1 per core and 512 KB L2 per core, but a much larger 64 MB L3 cache. This gives the AMD a significant total cache advantage, a trait typical of Zen 3's chiplet design with a large shared L3 per CCD.

Memory support is another major divergence. The Intel part supports both DDR4 and DDR5 over a dual-channel bus. The AMD part supports only DDR4, also dual-channel, with a rated bandwidth of 51.2 GB/s. The Intel processor includes integrated graphics in the form of UHD Graphics 770, while the AMD Ryzen 9 5900 has no integrated graphics at all. Both use unlocked multipliers for overclocking.

PCIe connectivity differs as well. The Intel Core i5-14600K provides Gen 5 with 16 CPU lanes. The AMD Ryzen 9 5900 provides Gen 4 with 20 CPU lanes. The Intel socket is LGA 1700, while the AMD uses Socket AM4. The Intel part was released in October 2023, while the AMD arrived in January 2021, making the Ryzen a much older design.

Head-to-Head Benchmarks

The largest Intel win comes in PassMark physics, where the i5-14600K scores 2473 against the Ryzen's 1697, a 45.7% advantage. Floating-point math also strongly favors Intel: 92,794 versus 69,124, a 34.2% margin. Cinebench R15 multi-core shows a 25.3% Intel lead with scores of 3640 and 2906. PassMark single-thread favors Intel by 24.2% (4270 vs 3439), and random string sorting gives Intel a 19.7% edge (51,949 vs 43,386).

Data compression is another Intel win, with 482,020 versus 411,453, a 17.2% gap. PassMark multithread goes to Intel at 38,682 versus 33,969, a 13.9% margin. Cinebench R20 multi-core and single-core both show identical 13.2% Intel leads: 13,709 vs 12,110 for multi, and 1935 vs 1709 for single. Extended instructions favor Intel by 6.3% (28,546 vs 26,859), and data encryption by 4.9% (27,533 vs 26,247).

The AMD Ryzen 9 5900's biggest win is dramatic: Cinebench R23 single-core at 4070 versus 2064, a 49.3% blowout. Cinebench R15 single-core also goes to AMD by 27.6% (410 vs 297). The R23 multi-core test gives AMD a 15.1% win with 28,834 versus 24,491. PassMark find prime numbers favors AMD at 213 versus 162, a 23.9% margin. Finally, integer math is a narrow AMD win: 128,641 versus 125,737, just 2.3%.

The pattern is not simply "Intel wins, AMD loses." The two processors swap leads across different generations of the same benchmark suite. In Cinebench R15, Intel wins multi-core while AMD wins single-core. In R20, Intel wins both. In R23, AMD wins both, with a particularly large single-core margin. This inconsistency suggests that workload characteristics and benchmark versions interact differently with the two architectures.

Specification Differences

| Specification | Intel Core i5-14600K | AMD Ryzen 9 5900 |

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

| Cores | 14 | 12 |

| Threads | 20 | 24 |

| Base clock | 3.50 GHz | 3.00 GHz |

| Boost clock | 5.30 GHz | 4.70 GHz |

| TDP | 125 W | 65 W |

| Process node | 10 nm | 7 nm |

| Foundry | Intel | TSMC |

| Die size | 257 mm² | 2x 74 mm² |

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

| L2 cache | 2 MB (per core) | 512 KB (per core) |

| L3 cache | 24 MB (shared) | 64 MB |

| Memory support | DDR4, DDR5 | DDR4 |

| Memory bandwidth | Not listed | 51.2 GB/s |

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

| Integrated graphics | UHD Graphics 770 | None |

| Socket | Intel Socket 1700 | AMD Socket AM4 |

| Release date | 2023-10-16 | 2021-01-11 |

| Launch MSRP | $319 | Not listed |

The TDP difference is notable: the Intel part is rated at 125 W, nearly double the AMD's 65 W. This aligns with the Intel part's higher clocks and larger monolithic die. The AMD's lower TDP and 7 nm process from TSMC suggest better power efficiency, though the database does not include direct power consumption measurements. The Intel part includes integrated graphics, which the AMD lacks, a meaningful feature for systems without a discrete GPU.

Where Each One Wins

The Intel Core i5-14600K is the choice for workloads that stress physical cores, floating-point math, and data manipulation. Its 45.7% lead in PassMark physics indicates strong performance in physics simulation tasks. The 34.2% advantage in floating-point math makes it well suited to scientific computing, financial modeling, and any workload with heavy FPU usage. Data compression and random string sorting wins of 17.2% and 19.7% respectively point to strengths in data processing, archiving, and database-style operations.

Intel also dominates the PassMark multithread metric by 13.9%, and its Cinebench R15 and R20 multi-core wins suggest strong performance in older rendering workloads. The single-thread PassMark win of 24.2% reinforces Intel's strength in lightly threaded desktop applications that rely on high boost clocks. For users on DDR5 platforms, the Intel processor's dual memory support is a clear advantage. The integrated UHD Graphics 770 also makes the i5-14600K a viable option for systems that need display output without a discrete GPU.

The AMD Ryzen 9 5900 wins in specific, identifiable areas. Its 49.3% Cinebench R23 single-core lead is the largest margin in the entire comparison, making it the stronger part for the latest generation of single-threaded rendering. The R23 multi-core win of 15.1% shows that in current Cinebench versions, the AMD's 24 threads and 64 MB L3 cache overcome the Intel's core count advantage. The 23.9% win in prime number finding indicates that integer-heavy mathematical workloads, especially those with high branch complexity or large working sets, run better on Zen 3.

The Ryzen's narrow 2.3% integer math win and its 27.6% Cinebench R15 single-core victory add to its profile. The 64 MB L3 cache likely benefits workloads with large, reused datasets. The lower 65 W TDP and DDR4-only support make it a better fit for existing AM4 platforms or builds where power draw is a priority. The 20 PCIe Gen 4 lanes provide more total lanes than the Intel's 16 Gen 5 lanes, which may matter for systems with multiple Gen 4 NVMe drives or other expansion cards.

In summary, the Intel i5-14600K is the stronger all-around performer with 12 benchmark wins, a higher average score, and broader platform features. The AMD Ryzen 9 5900 is a specialist that wins in current Cinebench versions and integer-heavy workloads, with a much larger cache and lower TDP. The choice depends on whether the workload aligns with Intel's core-heavy, high-clock design or AMD's thread-heavy, cache-rich chiplet architecture.