AMD EPYC 9555P vs Intel Xeon w9-3595X Comparison

Head-to-Head Benchmarks

The recorded head-to-head data shows a dominant performance profile for the AMD EPYC 9555P. Across the sixteen benchmark tests, the AMD part wins fourteen, with the Intel Xeon w9-3595X taking only two. The margin of victory is not uniform, however, and the two Intel wins are concentrated in single-threaded PassMark tests.

The most dramatic gap appears in the PassMark physics test. The EPYC 9555P scores 15,474 against 5,842 for the Xeon w9-3595X, a delta of 164.9%. This is the largest percentage difference in the entire dataset. The result suggests the AMD architecture handles the physics workload with substantially greater efficiency. The PassMark integer math test also shows a wide separation: 787,106 versus 473,507, a 66.2% advantage for AMD. Data encryption follows a similar pattern, with the EPYC 9555P at 148,896 and the Intel part at 92,249, a 61.4% gap.

The Cinebench tests are consistent across the board. In Cinebench R15, R20, and R23, both multicore and singlecore variants, the delta is exactly 36.6% in favor of the AMD EPYC 9555P. For multicore, the scores are 11,610 versus 8,497 in R15, 48,378 versus 35,407 in R20, and 115,186 versus 84,304 in R23. The singlecore Cinebench results show the same 36.6% delta, with the EPYC 9555P reaching 1,638 in R15, 6,829 in R20, and 16,261 in R23. This uniformity across all three Cinebench generations indicates a consistent per-thread and aggregate performance advantage, not a workload-specific anomaly.

The PassMark data compression test shows a 44.1% lead for AMD, with scores of 2,639,400 versus 1,831,962. Random string sorting yields a 47% delta, at 280,398 versus 190,745. Extended instructions are 33.8% higher for the EPYC 9555P, at 191,082 versus 142,785. Floating point math shows a 28.3% advantage, at 486,407 versus 379,008. The PassMark multithread score is closer, with the AMD part at 123,576 and Intel at 99,576, a 24.1% delta. The prime numbers test shows a large relative gap at 84%, with scores of 1,067 versus 580, though the absolute numbers are small.

The two Intel wins are in the PassMark single-thread and singlethread tests, which record identical scores of 3,720 for the Xeon w9-3595X and 3,410 for the EPYC 9555P. This is an 8.3% margin in favor of Intel. It is notable that this single-thread advantage does not translate into any Cinebench singlecore win, where AMD leads by 36.6%. The discrepancy suggests the PassMark single-thread test favors the Intel part's higher boost clock, while the Cinebench singlecore test responds to other architectural factors.

Architecture Differences

The two processors diverge significantly in their underlying designs. The AMD EPYC 9555P is built on the Zen 5 architecture, codenamed Turin, part of the EPYC 9005 series. It uses a 4 nm process from TSMC. The Intel Xeon w9-3595X is based on the Sapphire Rapids architecture, part of the Xeon W generation, and uses a 10 nm process from Intel's own foundry.

Core counts differ: the EPYC 9555P has 64 cores and 128 threads, while the Xeon w9-3595X has 60 cores and 120 threads. The AMD part has a base clock of 3.20 GHz and a boost clock of 4.40 GHz. The Intel part has a lower base clock of 2.00 GHz but a higher boost clock of 4.80 GHz. This explains the PassMark single-thread result, where the higher boost clock of the Intel part gives it an edge.

Cache hierarchies show notable differences. Both have 80 KB of L1 cache per core. The L2 cache differs: AMD has 1 MB per core, Intel has 2 MB per core. The L3 cache is a major differentiator. The EPYC 9555P has 256 MB of shared L3 cache, while the Xeon w9-3595X has 112.5 MB. This larger shared cache is a likely contributor to the AMD part's strong showing in data-heavy workloads like compression and encryption.

Memory support also differs. Both support DDR5 and ECC memory. The AMD part uses a twelve-channel memory bus with a recorded bandwidth of 576.0 GB/s. The Intel part uses an eight-channel bus with a bandwidth of 307.2 GB/s. The bandwidth difference is substantial and aligns with the multicore performance gap in memory-intensive tests.

PCIe connectivity varies as well. The EPYC 9555P offers Gen 5 with 128 lanes (CPU only), while the Xeon w9-3595X offers Gen 5 with 112 lanes (CPU only). The AMD part has a higher TDP of 360 watts, while the Intel part is rated at 385 watts. The Intel part is multiplier unlocked, whereas the AMD part is not. The die size differs considerably: the AMD part is composed of 8x 70.6 mm² chiplets, while the Intel part uses 4x 477 mm² dies. The AMD part is manufactured with 66,520 million transistors; the Intel transistor count is not recorded in the database.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD EPYC 9555P has an average benchmark score of 287,066, while the Intel Xeon w9-3595X has an average of 209,881. Both sit in the 99th percentile versus all CPUs.

Q: How does the AMD EPYC 9555P compare to its nearest rivals?

A: The database lists the Intel Xeon 696X as the closest rival, with a delta of 0.3%. The AMD EPYC 9565 is 0.6% behind, the Intel Xeon 6780E is 2.4% behind, and the AMD Ryzen Threadripper 9970X is 2.6% behind.

Q: How does the Intel Xeon w9-3595X compare to its nearest rivals?

A: The AMD EPYC 9455P leads the Intel part by 3.7%. The Intel Xeon 6741P trails by 7.7%, the AMD EPYC 9335 trails by 8.1%, and the Intel Xeon 678X trails by 8.5%.

Q: In which benchmark does the Intel Xeon w9-3595X beat the AMD EPYC 9555P?

A: The Intel part wins the PassMark single-thread test, scoring 3,720 against 3,410, an 8.3% advantage. The same result appears under the PassMark singlethread entry.

Q: What is the largest recorded performance delta between the two processors?

A: The PassMark physics test shows the largest gap, with the AMD EPYC 9555P leading by 164.9%, scoring 15,474 versus 5,842.

Q: What is the memory bandwidth difference?

A: The AMD EPYC 9555P has a twelve-channel memory bus with 576.0 GB/s bandwidth. The Intel Xeon w9-3595X has an eight-channel bus with 307.2 GB/s bandwidth.

The Verdict

The benchmark data is unambiguous in aggregate. The AMD EPYC 9555P wins fourteen of sixteen head-to-head tests, including every multicore and singlecore Cinebench test by a consistent 36.6% margin. Its average benchmark score of 287,066 places it in a class above the Intel part's 209,881. The AMD part also holds the top position against its nearest rivals, with the closest competitor, the Intel Xeon 696X, trailing by only 0.3%. The Intel Xeon w9-3595X, by contrast, trails its nearest rival, the AMD EPYC 9455P, by 3.7%.

The Intel part's only wins are in the PassMark single-thread test, where its higher boost clock of 4.80 GHz outperforms the AMD part's 4.40 GHz. For workloads that depend on that specific metric, the Intel part is the recorded leader. However, the Cinebench singlecore results do not follow this pattern; the AMD part leads there by the same 36.6% margin as in multicore tests. The data indicates that single-thread PassMark performance is an outlier rather than a general rule.

The AMD EPYC 9555P is the clear choice for most workloads based on these measurements. It offers higher core and thread counts, a larger L3 cache, a wider memory bus, and higher memory bandwidth. Its physics, integer math, encryption, and compression scores are all substantially higher. The Intel Xeon w9-3595X is the recorded winner only for the specific PassMark single-thread scenario.

Specification Differences

• Cores: AMD EPYC 9555P has 64, Intel Xeon w9-3595X has 60.
• Threads: AMD EPYC 9555P has 128, Intel Xeon w9-3595X has 120.
• Base Clock: AMD EPYC 9555P is 3.20 GHz, Intel Xeon w9-3595X is 2.00 GHz.
• Boost Clock: AMD EPYC 9555P is 4.40 GHz, Intel Xeon w9-3595X is 4.80 GHz.
• TDP: AMD EPYC 9555P is 360 watts, Intel Xeon w9-3595X is 385 watts.
• Socket: AMD EPYC 9555P uses AMD Socket SP5, Intel Xeon w9-3595X uses Intel Socket 4677.
• Process Node: AMD EPYC 9555P is 4 nm, Intel Xeon w9-3595X is 10 nm.
• L2 Cache: AMD EPYC 9555P has 1 MB per core, Intel Xeon w9-3595X has 2 MB per core.
• L3 Cache: AMD EPYC 9555P has 256 MB shared, Intel Xeon w9-3595X has 112.5 MB.
• Memory Bus: AMD EPYC 9555P is twelve-channel, Intel Xeon w9-3595X is eight-channel.
• Memory Bandwidth: AMD EPYC 9555P is 576.0 GB/s, Intel Xeon w9-3595X is 307.2 GB/s.
• PCIe Lanes: AMD EPYC 9555P has 128 lanes, Intel Xeon w9-3595X has 112 lanes.
• Multiplier Unlocked: AMD EPYC 9555P is false, Intel Xeon w9-3595X is true.
• Launch MSRP: AMD EPYC 9555P is $7983, Intel Xeon w9-3595X is $5889.

Where Each One Wins

The AMD EPYC 9555P wins in all multicore Cinebench tests (R15, R20, R23) by 36.6%. It wins all PassMark tests except single-thread, with deltas ranging from 24.1% in multithread to 164.9% in physics. It is the recorded leader in data compression, data encryption, extended instructions, prime numbers, floating point math, integer math, and random string sorting. Its higher core count, larger L3 cache, and wider memory bus support these results. Users running heavily parallel, memory-bandwidth-sensitive, or cache-bound workloads should select the AMD part based on the data.

The Intel Xeon w9-3595X wins only the PassMark single-thread test, with an 8.3% margin. This is the sole scenario where the database shows Intel ahead. The higher boost clock of 4.80 GHz is the distinguishing factor. For workloads that are strictly bounded by that single-thread PassMark metric, the Intel part is the recorded choice. Additionally, the Intel part is multiplier unlocked, which may be relevant for users who intend to adjust clock behavior, though the database does not record any overclocked benchmark results.