AMD EPYC 4345P vs Intel Xeon Gold 5318H Comparison

The AMD EPYC 4345P is the decisive winner in this matchup, taking 14 of 17 head-to-head benchmarks and delivering a stunning 49.5% lead in single-threaded PassMark performance over the Intel Xeon Gold 5318H. Despite the Intel part having more than twice the cores and threads, the EPYC's modern Zen 5 architecture and far higher clock speeds allow it to dominate nearly every workload category. The Xeon Gold 5318H retains only three wins, all in specialized memory or instruction-heavy tasks, but those victories are too narrow to offset the EPYC's broad superiority.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon Gold 5318H has 18 cores and 36 threads, while the AMD EPYC 4345P has 8 cores and 16 threads. Intel holds a 10-core and 20-thread advantage.

Q: How do their Cinebench R23 multi-core scores compare?

A: The AMD EPYC 4345P scores 32,020 in Cinebench R23 multi-core, which is 22.2% higher than the Intel Xeon Gold 5318H's 24,905. The EPYC wins by 7,115 points despite having fewer cores.

Q: What is the single-thread performance gap?

A: In PassMark single-thread testing, the EPYC 4345P scores 4,408 versus 2,225 for the Xeon Gold 5318H, a 49.5% advantage for AMD. This is the largest delta in the entire benchmark suite.

Q: Which processor wins in data compression and random string sorting?

A: The Intel Xeon Gold 5318H wins data compression with 470,916 versus 421,490 (11.7% lead) and random string sorting with 58,841 versus 46,238 (27.3% lead). These are Intel's only two PassMark wins.

Q: What are the process nodes and foundries?

A: The Intel Xeon Gold 5318H uses a 14 nm process from Intel, while the AMD EPYC 4345P uses a 4 nm process from TSMC. AMD's node advantage is significant.

Q: How do their memory bandwidth figures compare?

A: The Intel Xeon Gold 5318H supports six-channel DDR4 with 128.0 GB/s bandwidth, while the AMD EPYC 4345P uses dual-channel DDR5 with 89.6 GB/s. Intel's memory bandwidth is 38.4 GB/s higher.

Architecture Differences

The two processors come from fundamentally different design eras. The Intel Xeon Gold 5318H is built on the Cooper Lake-SP architecture using a 14 nm process at Intel's foundry, while the AMD EPYC 4345P uses the Zen 5 architecture (codename Grado) on a 4 nm process at TSMC. The node difference is stark: 14 nm versus 4 nm, giving AMD a massive transistor density and efficiency advantage.

Core configurations differ dramatically. Intel fields 18 cores and 36 threads with a base clock of 2.50 GHz and boost of 3.80 GHz. AMD counters with just 8 cores and 16 threads but runs at 3.80 GHz base and 5.50 GHz boost. The EPYC's boost clock is 1.70 GHz higher than Intel's, which explains its single-thread dominance.

Cache hierarchies also diverge. Intel uses 64 KB of L1 per core, 1 MB of L2 per core, and 24.75 MB of shared L3 cache. AMD uses 80 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3. The EPYC's L3 cache is 7.25 MB larger, and its per-core L1 is 16 KB larger.

Memory architecture shows a trade-off. Intel supports DDR4 with a six-channel memory bus delivering 128.0 GB/s bandwidth. AMD supports DDR5 with a dual-channel bus at 89.6 GB/s. Intel's bandwidth advantage is substantial, but AMD's DDR5 support offers newer technology.

PCIe capabilities differ by generation and lane count. Intel provides Gen 3 with 48 lanes, while AMD provides Gen 5 with 24 lanes. AMD's PCIe generation is two versions newer, though Intel offers double the lane count. Both support ECC memory.

Additional differences include AMD's integrated Radeon Graphics, which Intel lacks entirely. The EPYC 4345P is part of the EPYC 4005 series with a 65 W TDP, while the Xeon Gold 5318H draws 150 W. AMD's transistor count is listed at 8,315 million with a 70.6 mm² die size; Intel's data does not list these figures.

Head-to-Head Benchmarks

The AMD EPYC 4345P wins every Cinebench test by exactly 22.2%. In R15 multi-core, AMD scores 3,227 versus 2,510 for Intel. In R15 single-core, AMD scores 455 versus 354. The R20 results follow the same pattern: 13,448 versus 10,460 multi-core, and 1,898 versus 1,476 single-core. In R23, AMD's 32,020 multi-core and 4,520 single-core crush Intel's 24,905 and 3,516. The consistency of the 22.2% delta across all six tests indicates a uniform performance advantage.

PassMark results show more variance. The EPYC wins data encryption by a massive 53.9%, scoring 23,313 versus 10,743. This is AMD's second-largest win. Single-thread PassMark shows the largest gap at 49.5%, with AMD scoring 4,408 versus 2,225. The EPYC also wins multithread by 18.9% (36,123 versus 29,301), integer math by 13.1% (123,774 versus 107,603), floating-point math by 10.3% (74,255 versus 66,610), physics by 10.6% (2,583 versus 2,309), and prime numbers by 15.6% (167 versus 141).

Intel's wins are concentrated in three areas. Data compression goes to Intel by 11.7%, with a score of 470,916 versus 421,490. Extended instructions favor Intel by 6.5%, at 33,730 versus 31,663. The largest Intel victory is random string sorting, where Intel scores 58,841 versus 46,238, a 27.3% margin. These wins suggest Intel's architecture retains strengths in specific data manipulation tasks, but they cannot compensate for the EPYC's overwhelming performance elsewhere.

The overall win count is 14 for AMD and 3 for Intel. Both processors sit at the 90th percentile among all CPUs, and their average benchmark scores are nearly identical: 48,698 for Intel and 48,470 for AMD, a negligible 0.5% difference. This near-parity in average score masks the very different performance profiles each chip offers.

Specification Differences

The core and thread counts differ substantially: Intel has 18 cores and 36 threads, while AMD has 8 cores and 16 threads. Clock speeds show AMD's advantage: 3.80 GHz base and 5.50 GHz boost versus Intel's 2.50 GHz base and 3.80 GHz boost.

Thermal design power differs by 85 W, with Intel at 150 W and AMD at 65 W. Sockets are incompatible: Intel uses Socket 4189, while AMD uses Socket AM5. The process nodes differ by 10 nm, with Intel on 14 nm and AMD on 4 nm.

Memory support varies by generation and channel count. Intel supports DDR4 with a six-channel bus, while AMD supports DDR5 with a dual-channel bus. Memory bandwidth is 128.0 GB/s for Intel versus 89.6 GB/s for AMD.

PCIe capabilities differ: Intel provides Gen 3 with 48 lanes, AMD provides Gen 5 with 24 lanes. Integrated graphics are present only on AMD, which includes Radeon Graphics. The L1 cache per core is 64 KB for Intel and 80 KB for AMD, while L3 cache is 24.75 MB for Intel and 32 MB for AMD.

Release dates are four years apart: Intel launched on April 5, 2021, while AMD launched on May 12, 2025. AMD's launch MSRP is $329; Intel's is not listed. AMD's transistor count is listed at 8,315 million with a die size of 70.6 mm², while Intel's figures are not provided.

Where Each One Wins

The AMD EPYC 4345P wins in every scenario where raw computational throughput matters. Its 22.2% lead across all Cinebench multi-core tests means it handles rendering, video encoding, and general multi-threaded workloads better than the Xeon Gold 5318H, despite having 10 fewer cores. The EPYC's 49.5% single-thread advantage translates to superior responsiveness in lightly threaded applications, database queries, and any workload that cannot fully utilize multiple cores.

The EPYC's dominance in data encryption (53.9% lead) and integer math (13.1% lead) makes it the clear choice for security-focused workloads, cryptographic operations, and general business computing. Its 18.9% multithread advantage and 15.6% prime number win further cement its position for scientific computing and financial modeling. The 65 W TDP also means it can deliver this performance in power-constrained environments.

The Intel Xeon Gold 5318H wins in three specific niches. Its 27.3% lead in random string sorting suggests an advantage in text processing, log analysis, or any workload involving heavy string manipulation. The 11.7% data compression win makes it preferable for archiving, backup systems, or storage-related tasks. The 6.5% extended instructions win indicates an edge in workloads using specialized instruction sets.

Intel's six-channel memory architecture with 128.0 GB/s bandwidth provides a theoretical advantage for memory-bandwidth-bound applications, even though the benchmarks do not show this translating into wins. The higher core count (18 versus 8) and thread count (36 versus 16) could benefit workloads that scale perfectly with core count, though the benchmark data does not support this in practice.

The Verdict

The data is unambiguous: the AMD EPYC 4345P is the superior processor for nearly all use cases. It wins 14 of 17 benchmarks, including every Cinebench test, and achieves these victories with fewer cores, lower power consumption, and a more modern architecture. The 49.5% single-thread lead and 53.9% encryption advantage are decisive margins that make the EPYC the obvious choice for general server workloads, virtualization, and any application requiring strong per-core performance.

The Intel Xeon Gold 5318H should only be selected for the narrow set of workloads where its three wins matter most: data compression, random string sorting, and extended instruction processing. Its higher core count and six-channel memory bandwidth provide theoretical advantages, but the benchmark results show these do not translate into broader performance wins. The Xeon's 22.2% deficit in every Cinebench test is particularly telling, as it indicates the EPYC's architectural efficiency overcomes Intel's core advantage.

For buyers who prioritize single-thread performance, encryption, floating-point math, or multithreaded throughput, the AMD EPYC 4345P is the clear winner. For those with specific compression-heavy or string-sorting workloads, the Intel Xeon Gold 5318H remains viable, but its advantages are too narrow to recommend it as a general-purpose server processor. The EPYC's 4 nm process, 5.50 GHz boost clock, and 90th percentile ranking make it the modern choice, while the Xeon's 14 nm process and 3.80 GHz boost clock reflect an older design generation.