AMD EPYC 7343 vs Intel Core i9-13900K Comparison

Head-to-Head Benchmarks

The head-to-head data presents a clear split between the AMD EPYC 7343 and the Intel Core i9-13900K. Out of 17 shared benchmark tests, the Intel processor wins 13, while the AMD EPYC 7343 takes 4. The wins are not distributed evenly; they cluster around specific workload types.

The Intel Core i9-13900K dominates in most multi-threaded and throughput-oriented tests. In Cinebench R15 multi-core, it scores 5805.5 against the EPYC 7343's 3739, a 35.6% lead. The margin narrows in Cinebench R20 multi-core, where Intel scores 20740 versus 15580, a 24.9% advantage. In Cinebench R23 multi-core, the gap shrinks further to just 3.1%, with Intel at 38271.5 and AMD at 37097. This trend shows the EPYC 7343 becoming relatively stronger as the workload scales across more iterations or time.

The Intel part also wins decisively in PassMark integer math (207792 vs 156033, 24.9% ahead) and floating-point math (151562 vs 86311, a 43.1% lead). Data compression favors Intel at 793645 vs 589770, a 25.7% margin. Data encryption goes to Intel at 46609 vs 37454, a 19.6% win. Extended instructions, random string sorting, and multithread tests all fall to Intel with deltas ranging from 23% to 25.5%. The single-thread PassMark test shows Intel at 4608 versus AMD's 2740, a 40.5% advantage.

The AMD EPYC 7343's four wins are narrow but revealing. In Cinebench R15 single-core, AMD scores 527 versus Intel's 318, a 65.7% margin. Cinebench R23 single-core shows AMD at 5237 versus 2238.5, a 134% lead. PassMark find prime numbers goes to AMD at 382 versus 236, a 61.9% win. PassMark physics favors AMD at 4774 versus 3140, a 52% margin.

These results indicate that the EPYC 7343 excels in specific single-threaded legacy benchmarks and in prime-number finding, while the i9-13900K leads in modern multi-threaded and general throughput workloads. The single-core Cinebench R23 result is particularly striking: AMD more than doubles Intel's score, which suggests architectural efficiency in that specific test rather than raw frequency advantage.

Where Each One Wins

The Intel Core i9-13900K is the clear choice for general multi-threaded productivity. Its wins span Cinebench R15, R20, and R23 multi-core, all five PassMark throughput tests (compression, encryption, extended instructions, floating-point, integer, multithread, random string sorting), and both single-thread PassMark results. This covers rendering, data compression, encryption, and general number crunching. The 24.9% to 43.1% margins in integer and floating-point math suggest that the i9-13900K handles sustained computational loads with more headroom than the EPYC 7343.

The AMD EPYC 7343 wins in four specific areas: Cinebench R15 single-core, Cinebench R23 single-core, PassMark find prime numbers, and PassMark physics. The physics test is notable because it often reflects gaming or simulation workloads that are sensitive to memory latency and cache behavior. The find prime numbers test is a classic integer workload that rewards efficient branch prediction and cache utilization. The Cinebench single-core results, particularly the 134% lead in R23, point to a per-thread performance advantage that could matter in lightly threaded applications or in scenarios where a single core must handle a critical task.

For users running heavily parallel workloads like video encoding, 3D rendering, or large-scale data processing, the i9-13900K's 13 wins make it the stronger candidate. For workloads dominated by single-threaded legacy code, physics simulations, or prime-number computations, the EPYC 7343's four wins indicate a niche where it outperforms.

Architecture Differences

The two processors come from fundamentally different design philosophies. The AMD EPYC 7343 uses the Zen 3 architecture on a 7 nm process built by TSMC. It is part of the EPYC 7003 series, codenamed Milan, and targets the server/workstation segment on AMD Socket SP3. The Intel Core i9-13900K uses the Raptor Lake architecture on a 10 nm process built by Intel, codenamed Raptor Lake-S, and targets the desktop segment on Intel Socket 1700.

Core counts differ significantly: the EPYC 7343 has 16 cores and 32 threads, while the i9-13900K has 24 cores and 32 threads. Both support the same thread count, but Intel achieves this with more physical cores. The EPYC 7343 has a base clock of 3.20 GHz and a boost clock of 3.90 GHz. The i9-13900K has a base clock of 3.00 GHz and a boost clock of 5.80 GHz. The Intel part's higher boost clock explains its lead in most multi-threaded tests, while the EPYC 7343's lower boost but higher base-to-boost ratio may contribute to its efficiency in certain legacy single-thread tests.

Cache hierarchies are very different. The EPYC 7343 has 64 KB of L1 per core, 512 KB of L2 per core, and 128 MB of shared L3. The i9-13900K has 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3. The EPYC 7343's 128 MB L3 is more than three times larger than Intel's 36 MB, which likely explains its strong showing in the physics and find prime numbers tests, where large caches reduce memory traffic.

Memory support diverges as well. The EPYC 7343 uses DDR4 with an eight-channel memory bus and a recorded memory bandwidth of 204.8 GB/s. The i9-13900K supports both DDR4 and DDR5 with a dual-channel memory bus, but no bandwidth figure is recorded. The EPYC's eight-channel memory subsystem is designed for server workloads that demand high bandwidth, while Intel's dual-channel setup is typical for desktop use.

PCIe capabilities also differ: the EPYC 7343 offers Gen 4 with 128 lanes (CPU only), while the i9-13900K offers Gen 5 with 16 lanes (CPU only). The EPYC 7343 has no integrated graphics, while the i9-13900K includes UHD Graphics 770.

Specification Differences

The two processors differ in nearly every specification field. The EPYC 7343 has 16 cores and 32 threads; the i9-13900K has 24 cores and 32 threads. Base clocks are 3.20 GHz versus 3.00 GHz. Boost clocks are 3.90 GHz versus 5.80 GHz. Thermal design power is 190 W for the EPYC 7343 and 125 W for the i9-13900K.

Sockets differ: AMD Socket SP3 versus Intel Socket 1700. Process nodes are 7 nm (TSMC) versus 10 nm (Intel). The EPYC 7343 has a die size of 4x 81 mm², while the i9-13900K has a die size of 257 mm². The EPYC 7343 has 16,600 million transistors; no transistor count is recorded for the i9-13900K.

Cache specifications differ across all levels. L1 cache is 64 KB per core for AMD and 80 KB per core for Intel. L2 cache is 512 KB per core for AMD and 2 MB per core for Intel. L3 cache is 128 MB shared for AMD and 36 MB shared for Intel.

Memory support shows AMD limited to DDR4, while Intel supports both DDR4 and DDR5. Memory bus is eight-channel for AMD and dual-channel for Intel. Memory bandwidth is recorded at 204.8 GB/s for AMD, with no figure for Intel. Both support ECC memory. PCIe is Gen 4 with 128 lanes for AMD and Gen 5 with 16 lanes for Intel. The EPYC 7343 has no integrated graphics; the i9-13900K has UHD Graphics 770.

Market segments differ: server/workstation for AMD, desktop for Intel. Release dates are March 2021 for AMD and September 2022 for Intel. The EPYC 7343 has a locked multiplier; the i9-13900K has an unlocked multiplier. The EPYC 7343 has a launch MSRP of $1565, while the i9-13900K has a launch MSRP of $589.

FAQ

Q: Which processor has more cores?

A: The Intel Core i9-13900K has 24 cores, while the AMD EPYC 7343 has 16 cores. Both have 32 threads.

Q: Why does the AMD EPYC 7343 win the Cinebench R23 single-core test by such a large margin?

A: The EPYC 7343 scores 5237 versus 2238.5 for the i9-13900K, a 134% lead. This is the largest delta in any shared benchmark. The EPYC 7343 also wins Cinebench R15 single-core by 65.7%, suggesting its Zen 3 architecture performs particularly well in these specific legacy single-thread tests.

Q: How does the memory bandwidth compare?

A: The AMD EPYC 7343 has an eight-channel memory bus with a recorded bandwidth of 204.8 GB/s. The Intel Core i9-13900K has a dual-channel memory bus, and no bandwidth figure is recorded in the database.

Q: Which processor supports more PCIe lanes?

A: The AMD EPYC 7343 supports Gen 4 with 128 lanes (CPU only). The Intel Core i9-13900K supports Gen 5 with 16 lanes (CPU only).

Q: What is the difference in thermal design power?

A: The AMD EPYC 7343 has a TDP of 190 W. The Intel Core i9-13900K has a TDP of 125 W.

Q: Do both processors support ECC memory?

A: Yes, both the AMD EPYC 7343 and the Intel Core i9-13900K support ECC memory.

The Verdict

The data directs different users toward different processors. The Intel Core i9-13900K wins 13 of 17 head-to-head benchmarks, including all major multi-threaded Cinebench tests and the full PassMark throughput suite. Its 24 cores, 5.80 GHz boost clock, and dual-channel memory support make it the stronger choice for desktop users running rendering, compression, encryption, or general computational workloads. The 35.6% lead in Cinebench R15 multi-core and 24.9% leads in R20 and integer math indicate a consistent advantage in sustained parallel processing.

The AMD EPYC 7343 wins only 4 benchmarks, but those wins are meaningful for specific use cases. Its 134% lead in Cinebench R23 single-core and 65.7% lead in R15 single-core point to a per-thread efficiency that Intel cannot match in those tests. The 61.9% win in find prime numbers and 52% win in physics suggest that workloads relying on large caches (128 MB L3) or specific integer operations will favor the EPYC 7343. Its eight-channel memory bus with 204.8 GB/s bandwidth and 128 PCIe Gen 4 lanes make it suitable for server and workstation environments that need high memory throughput and extensive I/O expansion.

The verdict depends on the workload. For a desktop user prioritizing multi-threaded performance, the i9-13900K is the better choice based on its 13 wins and narrower margins in the remaining tests. For a server or workstation user running legacy single-threaded code, physics simulations, or prime-number computations, the EPYC 7343's wins in those specific areas, combined with its larger cache and higher memory bandwidth, make it the more appropriate processor. The i9-13900K's lower TDP (125 W vs 190 W) and unlocked multiplier add conveniences, but the EPYC 7343's 93rd percentile versus the i9-13900K's 92nd percentile in the overall CPU ranking shows both are top-tier performers. The database's recorded average benchmark score of 64202 for the EPYC 7343 versus 61766 for the i9-13900K, with a 0.2% delta to its nearest rival (the Intel Core i9-13900KS), indicates that the EPYC 7343 holds a slight edge in overall measured performance despite losing most head-to-head tests.