AMD Ryzen 9 3900X vs Intel Core i7-13700K Comparison

The Intel Core i7-13700K and AMD Ryzen 9 3900X represent two distinct eras of desktop computing, with the former launching in late 2022 and the latter in mid-2019. The benchmark data reveals a decisive generational shift: the i7-13700K secures 16 wins out of 17 head-to-head comparisons, with an average benchmark score of 46881 against the Ryzen’s 46487. Both processors sit at the 89th percentile among all CPUs, but the Intel part achieves that standing with a 10.7% deficit in only one test, while dominating every other workload by margins ranging from 16.3% to 96.6%.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i7-13700K has 16 cores and 24 threads, while the AMD Ryzen 9 3900X has 12 cores and 24 threads. Both offer the same thread count, but Intel achieves it with 4 additional physical cores.

Q: How significant is the single-core performance gap?

A: The i7-13700K leads by 54.5% in Cinebench R23 single-core (2116 vs 1370) and by 60.3% in PassMark single-thread (4333 vs 2703). This is the largest single-core advantage in the entire comparison, reflecting the substantial IPC and clock speed differences.

Q: Does the Ryzen 9 3900X win any benchmark?

A: Yes, the AMD part wins exactly one test: PassMark find prime numbers, scoring 214 versus Intel’s 191, a 10.7% advantage. This is the only workload where the older architecture outperforms the newer one.

Q: What is the difference in memory bandwidth specifications?

A: The Ryzen 9 3900X lists a memory bandwidth of 51.2 GB/s, while the i7-13700K has no bandwidth figure in the data. The Intel part supports both DDR4 and DDR5, whereas the AMD part supports only DDR4.

Q: Which processor has a larger L3 cache?

A: The AMD Ryzen 9 3900X has 64 MB of L3 cache, more than double the Intel’s 30 MB shared L3. However, the Intel part compensates with a larger per-core L2 cache of 2 MB versus AMD’s 512 KB.

Q: How do the launch MSRPs compare?

A: The Intel Core i7-13700K had a launch MSRP of $409, while the AMD Ryzen 9 3900X launched at $499. The newer Intel part launched at a lower price point despite its higher benchmark scores.

Architecture Differences

The fundamental architectural divide is node technology: Intel fabricates the i7-13700K on a 10 nm process at its own foundry, while AMD uses TSMC’s 7 nm process for the Ryzen 9 3900X. This process advantage helps AMD pack 7,600 million transistors across two 74 mm² dies, whereas Intel’s single die measures 257 mm². The i7-13700K uses the Raptor Lake-S architecture (Raptor Lake generation), while the Ryzen 9 3900X is built on Zen 2 (Matisse codename). Intel’s newer design delivers a base clock of 3.40 GHz and a boost clock of 5.40 GHz, compared to AMD’s 3.80 GHz base and 4.60 GHz boost. Despite the lower base clock, Intel’s higher boost clock and architectural improvements yield superior performance.

Cache hierarchies differ substantially. The i7-13700K allocates 80 KB L1 and 2 MB L2 per core, with 30 MB shared L3. The 3900X uses 64 KB L1 and 512 KB L2 per core, but a much larger 64 MB L3. This larger L3 on AMD may help in cache-sensitive workloads, yet the benchmark data shows Intel winning most such tests. Memory support also diverges: Intel supports both DDR4 and DDR5 in dual-channel configuration, while AMD is limited to DDR4. The i7-13700K includes integrated UHD Graphics 770, whereas the 3900X has no integrated graphics. PCIe capabilities differ as well: Intel offers Gen 5 with 20 lanes, AMD provides Gen 4 with 24 lanes. Both CPUs have unlocked multipliers, but their sockets are incompatible — Intel Socket 1700 versus AMD Socket AM4.

Where Each One Wins

The Intel Core i7-13700K wins across virtually every workload category. In multi-threaded productivity, it leads Cinebench R23 multicore by 61.8% (30745 vs 19000) and Geekbench multicore by 62.6% (19429 vs 11948). For floating-point math, the Intel part scores 114867 versus 58434, a 96.6% advantage — the largest margin in the entire dataset. Integer math shows a 55% lead (154446 vs 99628). Memory-intensive tasks like data compression favor Intel by 32.6% (595292 vs 448906), and random string sorting by 29.8% (62670 vs 48300). Encryption, extended instructions, and physics simulations all go to Intel with margins of 16.3%, 25.3%, and 51.4% respectively.

The AMD Ryzen 9 3900X wins only one specific test: PassMark find prime numbers, scoring 214 versus Intel’s 191. This suggests a niche advantage in prime-number computation, possibly related to its larger L3 cache or specific instruction scheduling. Outside that single workload, the 3900X is consistently behind. The data indicates that for general desktop use, content creation, or gaming-adjacent workloads, the i7-13700K is the stronger choice. The Ryzen’s only realistic use case would be applications heavily reliant on prime-number generation, which is a narrow and uncommon requirement.

Specification Differences

The two processors differ across nearly every major specification. Core counts: 16 (Intel) versus 12 (AMD). Thread counts are identical at 24. Base clocks: 3.40 GHz (Intel) versus 3.80 GHz (AMD). Boost clocks: 5.40 GHz (Intel) versus 4.60 GHz (AMD). TDP: 125 W (Intel) versus 105 W (AMD). Sockets: Intel Socket 1700 versus AMD Socket AM4. Process nodes: 10 nm (Intel) versus 7 nm (AMD). Foundries: Intel versus TSMC. Die sizes: 257 mm² (Intel) versus 2x 74 mm² (AMD). Transistors: not listed for Intel, 7,600 million for AMD. L1 cache: 80 KB per core (Intel) versus 64 KB per core (AMD). L2 cache: 2 MB per core (Intel) versus 512 KB per core (AMD). L3 cache: 30 MB shared (Intel) versus 64 MB (AMD). Memory support: DDR4/DDR5 (Intel) versus DDR4 (AMD). Memory bandwidth: not listed for Intel, 51.2 GB/s for AMD. ECC support: yes (Intel) versus no (AMD). PCIe: Gen 5, 20 lanes (Intel) versus Gen 4, 24 lanes (AMD). Integrated graphics: UHD Graphics 770 (Intel) versus none (AMD). Release dates: 2022-09-26 (Intel) versus 2019-07-06 (AMD). Launch MSRP: $409 (Intel) versus $499 (AMD).

Head-to-Head Benchmarks

The Cinebench R23 multicore test shows the starkest performance gap: Intel scores 30745 against AMD’s 19000, a 61.8% delta. This is the second-largest margin in the comparison and highlights Intel’s advantage in heavily threaded rendering workloads. Geekbench multicore follows closely with a 62.6% lead (19429 vs 11948), reinforcing the multi-threaded dominance. In floating-point math, Intel’s 114867 versus 58434 represents a 96.6% delta, the largest single benchmark win. This suggests the Raptor Lake architecture handles FP calculations far more efficiently than Zen 2.

Single-core tests tell a similar story. Cinebench R23 single-core shows Intel at 2116 versus 1370, a 54.5% delta. Geekbench single-core gives Intel 2529 versus 1664, a 52% advantage. PassMark single-thread shows 4333 versus 2703, a 60.3% delta. The consistency across these different single-threaded benchmarks confirms that Intel’s IPC and clock speed advantages are not test-specific but fundamental. Cinebench R15 tests show smaller but still significant gaps: multicore 4507.5 versus 3049 (47.8%) and single-core 303 versus 207 (46.4%).

In memory and data workloads, Intel maintains its lead but with smaller margins. Data compression: 595292 versus 448906 (32.6%). Data encryption: 33249 versus 28586 (16.3%). Random string sorting: 62670 versus 48300 (29.8%). Extended instructions: 36625 versus 29221 (25.3%). These results indicate that while AMD’s larger L3 cache helps narrow the gap, it does not overcome Intel’s architectural superiority. Physics simulation shows Intel at 2716 versus 1794, a 51.4% delta. PassMark multithread gives Intel 45887 versus 32544, a 41% lead. Integer math: 154446 versus 99628, a 55% delta.

The sole AMD victory in PassMark find prime numbers (214 vs 191, -10.7% for Intel) is an outlier. This test likely benefits from AMD’s larger L3 cache or specific integer division circuitry. However, this single win does not offset the overwhelming trend: the i7-13700K wins 16 of 17 benchmarks, with an average score of 46881 versus 46487 for the 3900X. The data conclusively shows that Intel’s newer architecture delivers superior performance across nearly all measurable workloads, with margins that grow particularly large in floating-point and multi-threaded scenarios.