CPU Comparison

The benchmark data compares the Intel Xeon 6781P and the AMD EPYC 9565 across 14 head-to-head tests. The results are decisive: the AMD EPYC 9565 wins every single benchmark in the dataset. The Intel Xeon 6781P records zero wins, while the AMD EPYC 9565 takes all 14. This is a complete sweep, though the margin varies significantly by workload. The average benchmark score for the AMD EPYC 9565 is 285,471, while the Intel Xeon 6781P posts a higher average of 315,524, a figure that reflects its standing among its own nearest rivals. Both processors sit in the 99th percentile of all CPUs, indicating top-tier placement, but the head-to-head data tells a different story than the aggregate averages.

Head-to-Head Benchmarks

The most consistent pattern across the benchmark suite is the AMD EPYC 9565’s advantage in multi-threaded rendering workloads. In Cinebench R15, R20, and R23 multicore tests, the AMD EPYC 9565 scores 11,585, 48,273, and 114,937 respectively, compared to the Intel Xeon 6781P’s 10,105, 42,106, and 100,254. In each case, the delta is exactly -12.8%, meaning the Intel part trails by a uniform margin in these three tests. This consistency suggests a fundamental throughput advantage for the AMD processor in heavily parallel, floating-point-heavy rendering tasks, not a workload-specific quirk.

The gap widens considerably in integer math. In the PassMark integer math test, the AMD EPYC 9565 scores 717,948 against the Intel Xeon 6781P’s 584,834, a delta of -18.5%. This is a substantial lead for the AMD part, indicating superior per-core integer execution efficiency. The prime number finding test shows an even larger disparity: the AMD EPYC 9565 achieves 2,422, while the Intel Xeon 6781P manages only 1,687, a -30.3% delta. This is the single largest margin in the entire dataset, highlighting a pronounced weakness for the Intel processor in this specific algorithmic workload.

Data encryption performance also favors the AMD EPYC 9565, which scores 141,936 compared to the Intel Xeon 6781P’s 119,623, a -15.7% delta. This suggests the AMD part has a meaningful edge in cryptographic operations. The single-threaded results reinforce the theme of AMD’s per-core superiority. In PassMark single-thread and singlethread tests, the AMD EPYC 9565 scores 3,696 in both, while the Intel Xeon 6781P scores 3,152, resulting in a -14.7% delta. This is a clear indicator that the AMD Zen 5 core is more efficient than the Intel Granite Rapids core in single-threaded execution.

The remaining benchmarks show smaller, yet still consistent, AMD leads. In floating-point math, the AMD EPYC 9565 scores 549,422 versus 507,406, a -7.6% delta. PassMark multithread shows the AMD part at 135,221 against 117,946, a -12.8% delta. Data compression results in 2,579,631 for the AMD EPYC 9565 and 2,441,690 for the Intel Xeon 6781P, a -5.3% delta. Extended instructions see a -5% delta (209,595 vs 199,048), and random string sorting shows a -8% delta (291,941 vs 268,573). The physics test is the closest contest, with the AMD EPYC 9565 scoring 18,036 and the Intel Xeon 6781P scoring 17,753, a slim -1.6% delta. Even the narrowest margin favors the AMD chip.

Where Each One Wins

Given that the AMD EPYC 9565 wins every benchmark in the dataset, the "where each one wins" analysis is straightforward: the AMD part wins everywhere. The Intel Xeon 6781P has no benchmark victories to discuss. However, the magnitude of the losses varies, which provides insight into relative strengths. The Intel Xeon 6781P’s closest performance is in the PassMark physics test, where it trails by only 1.6%. This indicates that in physics simulation workloads, the two processors are nearly matched, and the Intel part is not far behind. Similarly, in data compression and extended instructions, the deltas are relatively modest at -5.3% and -5%, respectively. These are areas where the Intel Xeon 6781P is competitively close, even if it does not take the lead.

The Intel Xeon 6781P’s worst performance relative to the AMD EPYC 9565 is in the prime number test, where it trails by 30.3%. This is a clear weak spot for the Intel architecture. The next largest deltas are in integer math (-18.5%) and data encryption (-15.7%), both of which are substantial deficits. For users prioritizing integer-heavy computation, cryptography, or prime-number-related algorithms, the AMD EPYC 9565 holds a decisive edge. For users whose workloads are more balanced or physics-focused, the Intel Xeon 6781P is closer in performance, though still behind. The data shows no scenario in the provided benchmarks where the Intel Xeon 6781P comes out ahead.

FAQ

Q: Which processor wins the most benchmarks in the head-to-head comparison?

A: The AMD EPYC 9565 wins all 14 head-to-head benchmarks. The Intel Xeon 6781P wins zero.

Q: What is the largest performance gap between the two processors?

A: The largest gap is in the PassMark find prime numbers test, where the AMD EPYC 9565 scores 2,422 and the Intel Xeon 6781P scores 1,687, resulting in a -30.3% delta for the Intel part.

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

A: The AMD EPYC 9565 is ahead in single-threaded performance, scoring 3,696 in the PassMark single-thread test, compared to 3,152 for the Intel Xeon 6781P, a -14.7% delta.

Q: Is there any benchmark where the Intel Xeon 6781P is nearly competitive?

A: Yes, in the PassMark physics test, the Intel Xeon 6781P scores 17,753 against the AMD EPYC 9565’s 18,036, a slim -1.6% delta, representing the closest result in the dataset.

Q: What is the difference in average benchmark scores between the two?

A: The Intel Xeon 6781P has a higher average benchmark score of 315,524, while the AMD EPYC 9565 has an average of 285,471. This is despite the AMD part winning all head-to-head tests.

Q: How do the Cinebench multicore results compare?

A: In Cinebench R15, R20, and R23 multicore, the AMD EPYC 9565 scores 11,585, 48,273, and 114,937, respectively. The Intel Xeon 6781P scores 10,105, 42,106, and 100,254, with a consistent -12.8% delta in each test.

Specification Differences

The core and thread counts differ significantly. The Intel Xeon 6781P has 80 cores and 160 threads, while the AMD EPYC 9565 has 72 cores and 144 threads. Despite having fewer cores, the AMD part wins all benchmarks. Clock speeds also favor the AMD processor: the Intel Xeon 6781P has a base clock of 2.00 GHz and a boost clock of 3.80 GHz, while the AMD EPYC 9565 has a base clock of 3.15 GHz and a boost clock of 4.30 GHz. Power consumption is higher for the AMD part, with a TDP of 400 watts versus 350 watts for the Intel part. The sockets are incompatible: the Intel Xeon 6781P uses Intel Socket 4710, while the AMD EPYC 9565 uses AMD Socket SP5.

Memory configuration is another key differentiator. The Intel Xeon 6781P supports eight-channel DDR5 memory with a bandwidth of 409.6 GB/s, while the AMD EPYC 9565 supports twelve-channel DDR5 memory with a bandwidth of 576.0 GB/s. PCIe lanes also differ: the Intel part provides 136 Gen 5 lanes (CPU only), while the AMD part provides 128 Gen 5 lanes (CPU only). The release dates are different, with the Intel Xeon 6781P released on 2025-02-23 and the AMD EPYC 9565 released on 2024-10-09. The launch MSRP for the Intel Xeon 6781P is $8960, and for the AMD EPYC 9565 it is $10486.

Architecture Differences

The two processors are built on fundamentally different architectures and process nodes. The Intel Xeon 6781P uses the Granite Rapids architecture, fabricated on a 5 nm process by Intel, with a die size of 2x 598 mm². The AMD EPYC 9565 uses the Zen 5 architecture (codename Turin), fabricated on a 4 nm process by TSMC, with a die size of 12x 70.6 mm² and a transistor count of 99,780 million. The cache hierarchies also differ. The Intel Xeon 6781P has 112 KB of L1 cache per core, 2 MB of L2 cache per core, and 336 MB of shared L3 cache. The AMD EPYC 9565 has 80 KB of L1 cache per core, 1 MB of L2 cache per core, and 384 MB of shared L3 cache. The AMD part has a larger L3 cache, while the Intel part has larger per-core L1 and L2 caches.

The memory controllers differ in channel count, as noted, with the AMD part offering twelve channels versus the Intel part’s eight. Both support ECC memory and lack integrated graphics. The AMD EPYC 9565 belongs to the EPYC 9005 series, while the Intel Xeon 6781P is part of the Xeon 6 (Granite Rapids-SP) generation. The part numbers are distinct: SRV5J for Intel and 100-000001447 for AMD. Neither processor has an unlocked multiplier.

The Verdict

The data is unambiguous: the AMD EPYC 9565 outperforms the Intel Xeon 6781P in every benchmark test provided. For users seeking maximum performance in multi-threaded rendering, integer math, encryption, or single-threaded tasks, the AMD EPYC 9565 is the superior choice based on the evidence. Its wins range from a narrow 1.6% margin in physics to a dominant 30.3% margin in prime number finding. The AMD part achieves this despite having fewer cores (72 vs 80) and fewer threads (144 vs 160), which points to a significant per-core efficiency advantage from the Zen 5 architecture and its higher clock speeds.

The Intel Xeon 6781P’s higher average benchmark score of 315,524, compared to the AMD EPYC 9565’s 285,471, is a point of confusion, but it reflects the Intel part’s placement among its own nearest rivals, not its performance against the AMD chip. The head-to-head results are the definitive measure, and they favor the AMD EPYC 9565 across the board. For workloads that are physics-heavy, the Intel Xeon 6781P is closest to parity, but it still loses. For any other workload in the dataset, the AMD EPYC 9565 provides a clear performance advantage, often by double-digit percentages. The recommendation is straightforward: the AMD EPYC 9565 is the stronger processor in this comparison.