AMD EPYC 9455P vs Intel Xeon 6745P Comparison

Where Each One Wins

The benchmark record is unambiguous: the AMD EPYC 9455P wins every single one of the sixteen recorded head-to-head comparisons against the Intel Xeon 6745P. There is no workload category in the database where the Intel part takes the lead. The AMD processor's advantage spans rendering, compression, encryption, math workloads, and threading tests, making it the dominant choice for nearly every compute-intensive server task.

The Intel Xeon 6745P, however, is not without its own strengths when viewed in a broader context. Its average benchmark score of 154,858 places it in the 98th percentile of all CPUs, meaning it still outperforms the vast majority of processors on the market. The database shows it sits within a tight cluster of rivals: it trails the Intel Xeon 676X by 2.3%, the AMD EPYC 9355P by 3.4%, the AMD EPYC 7663 by 4.4%, and the AMD EPYC 9375F by 4.7%. This indicates the Xeon 6745P is a competitive mid-pack server part, but it is simply outclassed by the EPYC 9455P in direct comparison.

For the EPYC 9455P, its 99th percentile standing and average score of 217,854 show a processor operating at the very top of the database hierarchy. Its nearest rivals include the Intel Xeon w9-3595X (3.8% behind the AMD part), the Intel Xeon 6747P (8.6% ahead), the Intel Xeon 6741P (11.8% behind), and the AMD EPYC 9335 (12.2% behind). The wins are decisive and consistent, suggesting the AMD part is engineered for maximum throughput across a wide range of tasks, rather than optimized for a narrow specialty.

Architecture Differences

The two processors diverge significantly in their fundamental design. The AMD EPYC 9455P is built on the Zen 5 architecture, codenamed Turin, and manufactured on a 4 nm process at TSMC. It contains 48 cores and 96 threads, with a base clock of 3.15 GHz and a boost clock of 4.40 GHz. The chip is composed of eight die, each measuring 70.6 mm², totaling 66,520 million transistors. Its cache hierarchy includes 80 KB of L1 per core, 1 MB of L2 per core, and a substantial 256 MB of shared L3 cache. Memory support is DDR5 over a twelve-channel bus, delivering 576.0 GB/s of bandwidth. It uses the AMD Socket SP5 and provides 128 PCIe Gen 5 lanes.

The Intel Xeon 6745P takes a different approach. It is based on the Granite Rapids architecture, manufactured on a 5 nm process at Intel. The chip has 32 cores and 64 threads, with a base clock of 3.10 GHz and a boost clock of 4.30 GHz. It is a dual-die design with each die measuring 598 mm². The cache configuration uses 112 KB of L1 per core, 2 MB of L2 per core, and a larger 336 MB of shared L3 cache. Memory support is DDR5 over an eight-channel bus, providing 409.6 GB/s of bandwidth. It fits into the Intel Socket 4710 and offers 88 PCIe Gen 5 lanes.

The core count difference is the most critical architectural factor: the AMD part has 50% more cores and threads, which directly explains its dominance in multithreaded workloads. The AMD part also has a wider memory interface (twelve channels versus eight), resulting in 40.6% more memory bandwidth. The Intel part does have a larger L3 cache (336 MB versus 256 MB), which may help in certain cache-sensitive tasks, but the benchmark data does not show any workload where this advantage translates into a win. Both processors have identical TDP ratings of 300 W, and neither supports integrated graphics or unlocked multipliers.

Head-to-Head Benchmarks

The head-to-head results are striking in their consistency. Across all Cinebench tests, the AMD EPYC 9455P leads by exactly 38.6%. In Cinebench R15 multicore, the AMD scores 9999 against Intel's 7214. In R20 multicore, the results are 41666 versus 30062. In R23 multicore, the AMD reaches 99206 while the Intel manages 71578. The single-core Cinebench tests show the same 38.6% margin, with the AMD scoring 1411 in R15 and 5882 in R20 against Intel's 1018 and 4244, respectively.

The PassMark suite reveals even larger gaps in specific areas. The most extreme delta is in the physics test, where the AMD EPYC 9455P scores 17315 against the Intel's 6144, a 181.8% lead. This suggests a massive advantage in simulated physics calculations, likely due to the higher core count and thread throughput. Integer math shows a 79.9% lead (606239 versus 336926), and random string sorting shows an 81.8% lead (242701 versus 133528). Data encryption shows a 73.1% advantage (115403 versus 66665), and prime number finding shows a 62.6% lead (1107 versus 681).

The smallest margin is in single-threaded performance. The PassMark single-thread test shows the AMD scoring 3745 against Intel's 3450, a modest 8.6% lead. This is the only category where the Intel processor approaches parity, indicating that the Xeon's per-core performance is respectable, but it cannot compensate for the AMD part's substantial core-count advantage in parallel workloads. The data compression test shows a 42.6% lead (1928897 versus 1352801), floating point math a 33.8% lead (357783 versus 267438), extended instructions a 26.9% lead (137485 versus 108326), and the multithread test a 38.9% lead (116927 versus 84210).

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 9455P has 48 cores and 96 threads, while the Intel Xeon 6745P has 32 cores and 64 threads.

Q: What is the largest performance gap between the two in the recorded benchmarks?

A: The largest gap is in the PassMark physics test, where the AMD EPYC 9455P scores 17315, which is 181.8% higher than the Intel Xeon 6745P's score of 6144.

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

A: The AMD EPYC 9455P leads in the PassMark single-thread test with a score of 3745 versus 3450 for the Intel Xeon 6745P, a 8.6% advantage. This is the closest margin between the two in any test.

Q: What are the memory bandwidth specifications for each processor?

A: The AMD EPYC 9455P supports DDR5 over a twelve-channel bus with 576.0 GB/s of bandwidth. The Intel Xeon 6745P supports DDR5 over an eight-channel bus with 409.6 GB/s of bandwidth.

Q: How does the total number of benchmark wins break down?

A: The AMD EPYC 9455P wins all 16 head-to-head benchmark comparisons recorded in the database. The Intel Xeon 6745P has zero wins.

Q: What are the release dates for these processors?

A: The AMD EPYC 9455P was released on 2024-10-09, and the Intel Xeon 6745P was released on 2025-02-23.

The Verdict

The data directs a clear conclusion: for any workload that benefits from high core counts, high memory bandwidth, or parallel processing, the AMD EPYC 9455P is the superior choice. Its 38.6% lead across all Cinebench tests and its 181.8% lead in the physics test demonstrate a decisive throughput advantage. The processor's 48 cores, 96 threads, and 576.0 GB/s of memory bandwidth make it the right pick for render farms, scientific computing, database workloads, and any server application where raw multithreaded performance is the primary requirement.

For the Intel Xeon 6745P, the appropriate audience is narrower. Its 8.6% deficit in single-threaded performance is the closest the Intel part comes to matching the AMD, and its larger 336 MB L3 cache may be beneficial for specific cache-heavy workloads. However, the database does not include any benchmark where this translates into a win. The Xeon 6745P remains a capable server processor, as evidenced by its 98th percentile ranking and its competitive position against other mid-range EPYC and Xeon parts, but it is not the top performer in this direct comparison.

The choice ultimately depends on whether the application is bound by core count or by single-thread efficiency. The AMD EPYC 9455P wins on nearly every metric that matters for modern server scaling. The Intel Xeon 6745P offers a lower core count and reduced memory bandwidth, making it a less attractive option for the same price bracket, though its performance relative to other rivals is solid. The benchmark record shows no scenario where the Intel part outperforms the AMD in any recorded test, so the verdict is straightforward: the EPYC 9455P is the dominant processor in this pairing.