AMD EPYC 7C13 vs Intel Xeon 6745P Comparison

Head-to-Head Benchmarks

The benchmark data presents a lopsided contest on paper, with Intel Xeon 6745P taking 13 of 16 head-to-head tests, yet the AMD EPYC 7C13 secures decisive victories in the specific workloads where its architecture dominates. The most dramatic split occurs in PassMark’s integer math and data encryption tests, where the EPYC 7C13 wins by 46.2% and 72.2% respectively. Those are not marginal edges; they are category-level separations. In integer math, the EPYC 7C13 scores 492,554 against the Xeon 6745P’s 336,926. For encryption, the gap is even starker: 114,769 versus 66,665. The Xeon 6745P’s 32-core design simply cannot keep pace with the EPYC 7C13’s 64-core configuration when the workload scales with core count.

However, the Xeon 6745P strikes back across nearly every other metric. In Cinebench R23 multi-core, the Xeon 6745P scores 71,578 against the EPYC 7C13’s 64,873, a 9.4% advantage. That same 9.4% delta repeats across Cinebench R15 multi-core (7,214 vs 6,539), R20 multi-core (30,062 vs 27,246), and PassMark multi-thread (84,210 vs 76,322). The consistency of that 9.4% figure across multiple render tests suggests a fundamental throughput advantage per clock, not a workload-specific quirk. Single-core performance tells an even more one-sided story: in PassMark single-thread, the Xeon 6745P leads by 24.1% (3,450 vs 2,618), and in Cinebench R23 single-core it leads by a similar margin (4,244 vs 3,846 in R20, though the delta is 9.4% there).

The Xeon 6745P also wins in extended instructions (108,326 vs 85,034, a 21.5% lead), find prime numbers (681 vs 539, a 20.9% lead), and physics (6,144 vs 4,904, a 20.2% lead). Floating-point math is nearly a tie — the Xeon 6745P edges ahead by just 0.2% (267,438 vs 266,846) — and random string sorting is close too, with the Xeon 6745P ahead by 1.6% (133,528 vs 131,361). The EPYC 7C13’s only other win beyond integer math and encryption is data compression, where it leads by 15.5% (1,562,251 vs 1,352,801). That compression result is notable because it suggests the AMD part’s larger L3 cache (256 MB shared) pays dividends in memory-bound compression workloads, even though the Xeon 6745P has a larger L3 in absolute terms (336 MB shared).

Where Each One Wins

The AMD EPYC 7C13 is the clear choice for security-heavy and data-dense workloads. Its 72.2% encryption win is not a small advantage — it suggests the 64-core Zen 3 design, with 128 threads, provides substantial parallelism for cryptographic operations. Similarly, the 46.2% integer math lead indicates that workloads heavy on integer arithmetic — database transactions, financial modeling, certain scientific simulations — will see significantly better throughput on the EPYC 7C13. The 15.5% data compression advantage further solidifies its position in storage and archival applications where compression ratio and speed matter. These three wins point to a processor optimized for raw parallel compute breadth.

The Intel Xeon 6745P, by contrast, wins everywhere else. Its 24.1% single-thread lead in PassMark is the most decisive single-core margin in the entire dataset, which matters for workloads that resist parallelization: legacy applications, per-core licensing models, or real-time processing with tight latency requirements. The 21.5% lead in extended instructions (a proxy for SIMD-heavy code) and 20.9% lead in prime-number finding (a proxy for pure integer throughput per core) reinforce the picture of a CPU with superior per-core execution. The Cinebench wins, while consistent at 9.4%, are broad — they cover R15, R20, and R23, indicating the Xeon 6745P’s advantage holds across render engine generations. For physics simulation, the 20.2% lead (6,144 vs 4,904) suggests better handling of collision detection and rigid-body dynamics, which often benefit from higher clock speeds.

In mixed workloads, the Xeon 6745P’s PassMark multi-thread score of 84,210 versus 76,322 shows it can still outrun the EPYC 7C13 in general multithreaded throughput despite having half the cores. The near-tie in floating-point math (0.2% delta) means neither chip holds a meaningful edge in that domain. The 1.6% random-string-sorting lead for Intel is negligible. For buyers, the choice is binary: if the workload is dominated by encryption, integer math, or compression, the EPYC 7C13’s wins are substantial enough to justify its 64-core configuration. For virtually everything else — rendering, single-threaded response, SIMD, physics — the Xeon 6745P delivers a measurable, often large, advantage.

FAQ

Q: Which processor wins more head-to-head benchmarks?

A: The Intel Xeon 6745P wins 13 of 16 head-to-head tests, while the AMD EPYC 7C13 wins 3.

Q: What is the biggest single benchmark delta between the two?

A: The AMD EPYC 7C13 leads by 72.2% in PassMark data encryption (114,769 vs 66,665). The Intel Xeon 6745P’s largest lead is 24.1% in PassMark single-thread (3,450 vs 2,618).

Q: How do they compare in multi-core rendering?

A: The Intel Xeon 6745P leads by 9.4% in Cinebench R23 multi-core (71,578 vs 64,873). The same 9.4% delta appears in Cinebench R15 and R20 multi-core tests.

Q: Does the AMD EPYC 7C13 outperform the Xeon 6745P in any PassMark tests?

A: Yes. The EPYC 7C13 wins data compression (1,562,251 vs 1,352,801, a 15.5% lead), data encryption (114,769 vs 66,665, a 72.2% lead), and integer math (492,554 vs 336,926, a 46.2% lead).

Q: What is the average benchmark score difference?

A: The AMD EPYC 7C13 has an average benchmark score of 167,788, while the Intel Xeon 6745P averages 154,858. The EPYC 7C13’s nearest rival, the AMD Ryzen Threadripper PRO 3995WX, scores 171,748, which is 2.3% higher. The Xeon 6745P’s closest rival, the Intel Xeon 676X, scores 158,540, which is 2.3% higher than the 6745P.

Q: Which processor has a higher PassMark multi-thread score?

A: The Intel Xeon 6745P scores 84,210 versus the AMD EPYC 7C13’s 76,322, a 9.4% advantage for Intel.

Specification Differences

The two processors differ on nearly every core specification. The AMD EPYC 7C13 has 64 cores and 128 threads, while the Intel Xeon 6745P has 32 cores and 64 threads — exactly half. Base clocks favor Intel: 3.10 GHz versus 2.00 GHz for AMD. Boost clocks also favor Intel: 4.30 GHz versus 3.68 GHz. Thermal design power is higher for Intel at 300 W versus 225 W for AMD. Sockets are incompatible: AMD uses Socket SP3, Intel uses Socket 4710.

Memory support diverges completely. The EPYC 7C13 supports DDR4, while the Xeon 6745P supports DDR5. Both use eight-channel memory buses, but bandwidth differs: the EPYC 7C13 delivers 204.8 GB/s, while the Xeon 6745P delivers 409.6 GB/s — exactly double. Cache configurations are also different. L1 cache is 64 KB per core on AMD versus 112 KB per core on Intel. L2 is 512 KB per core on AMD versus 2 MB per core on Intel. L3 is 256 MB shared on AMD versus 336 MB shared on Intel.

PCIe capabilities differ. The EPYC 7C13 provides Gen 4 with 128 lanes (CPU only), while the Xeon 6745P provides Gen 5 with 88 lanes (CPU only). The AMD part has no integrated graphics, and the Intel part lists "N/A" for integrated graphics. Process node and foundry are different: AMD uses 7 nm at TSMC, Intel uses 5 nm at Intel. Transistor count is listed for AMD (33,200 million) but not for Intel. Die size is listed for both: 8x 81 mm² for AMD versus 2x 598 mm² for Intel. Release dates differ — the Xeon 6745P has a release date of 2025-02-23, while the EPYC 7C13 has none listed.

Architecture Differences

The architectural divide is generational. The AMD EPYC 7C13 is built on Zen 3, codenamed Milan, while the Intel Xeon 6745P is built on Granite Rapids, part of the Xeon 6 family. The process nodes reflect different foundry choices: AMD uses TSMC’s 7 nm process, Intel uses its own 5 nm process. The EPYC 7C13’s die is composed of eight 81 mm² chiplets, totaling 33,200 million transistors. The Xeon 6745P uses two 598 mm² dies, with no transistor count listed.

Cache architecture differs in both size and structure. AMD allocates 64 KB L1 and 512 KB L2 per core, with a massive 256 MB shared L3. Intel allocates 112 KB L1 and 2 MB L2 per core, with 336 MB shared L3. The larger per-core L2 on Intel (2 MB vs 512 KB) suggests a design that favors per-core locality, while AMD’s larger shared L3 (256 MB vs 336 MB, but on a chip with twice the cores) favors data sharing across threads.

Memory architecture is a clear generational leap for Intel. The Xeon 6745P’s DDR5 support with 409.6 GB/s bandwidth is double the EPYC 7C13’s DDR4 bandwidth of 204.8 GB/s. Both support ECC memory and eight-channel configurations. PCIe also reflects generational change: Intel provides Gen 5 (88 lanes) versus AMD’s Gen 4 (128 lanes). The lane count favors AMD, but the protocol speed favors Intel. Both chips are locked (multiplier unlocked: false) and target the server/workstation segment. The EPYC 7C13’s part number is 100-000000315; the Xeon 6745P’s is SRWPAQ7L9. The Intel part has a launch MSRP of $5250; the AMD part has no listed MSRP.