AMD EPYC 7C13 vs Intel Xeon 676X Comparison

Head-to-Head Benchmarks

The benchmark data presents a clear overall winner, yet the nature of that victory varies sharply by workload. Intel Xeon 676X takes 13 of the 16 head-to-head comparisons, with AMD EPYC 7C13 winning only three. However, the AMD victories are decisive in their specific domains, while many Intel wins are narrow.

Starting with the Cinebench suite, the Intel Xeon 676X dominates uniformly. Across Cinebench R15, R20, and R23, the Intel part leads by exactly 16.2% in both single-core and multi-core tests. For example, in Cinebench R23 multi-core, Intel scores 77,447 against AMD’s 64,873; in single-core, Intel posts 4,015 against 2,618 on PassMark’s single-thread test. This consistent 16.2% gap in Cinebench suggests a fundamental throughput advantage in rendering-style workloads, not just a clock-speed edge.

The PassMark multi-thread test reinforces this pattern, with Intel at 91,115 versus AMD’s 76,322, again a 16.2% delta. The physics test is even more lopsided: Intel scores 8,281 against AMD’s 4,904, a 40.8% advantage. This is the largest percentage gap in the entire comparison, indicating that Intel’s architecture handles physics simulation particularly well relative to its overall performance.

Yet the AMD EPYC 7C13 holds its ground in three specific areas, and two of those wins are enormous. In PassMark data encryption, AMD scores 114,769 against Intel’s 67,638 — a 69.7% advantage. That is the single biggest win for either side. In integer math, AMD posts 492,554 versus Intel’s 354,777, a 38.8% lead. Data compression also goes AMD’s way, with 1,562,251 versus 1,355,807, a 15.2% margin.

The remaining Intel wins are more modest. Extended instructions go Intel’s way by 19.2% (105,231 versus 85,034). Find prime numbers favors Intel by 27% (738 versus 539). Floating-point math is closer, with Intel ahead just 5.9% (283,570 versus 266,846). Random string sorting sees Intel win by only 4.8% (137,976 versus 131,361). Single-thread performance is decisively Intel’s, at 4,015 versus 2,618, a 34.8% gap.

Overall, the average benchmark score tells a similar story: AMD’s 167,788 average is 3.3% ahead of its nearest rival (AMD EPYC 9375F at 162,497, a 3.3% delta), while Intel’s 158,540 average is 1.1% behind its nearest rival (AMD EPYC 9355P at 160,358). Both processors sit in the 98th percentile of all CPUs, so neither is a slouch in absolute terms.

Where Each One Wins

The AMD EPYC 7C13 is the clear choice for security and data transformation workloads. Its 69.7% lead in encryption is not a marginal edge; it is a categorical advantage. For any task involving cryptographic operations, secure communications, or data-at-rest protection, the AMD part will complete the work in a fraction of the time. Similarly, the 38.8% lead in integer math makes it well-suited for database indexing, financial calculations, and general integer-heavy processing where large core counts matter.

Intel Xeon 676X wins everywhere else, but the magnitude varies. The 40.8% physics advantage and 34.8% single-thread lead suggest this processor excels in interactive or simulation-heavy environments where per-thread performance is critical. The 16.2% Cinebench margin across all three versions indicates strong sustained multi-core rendering performance. For floating-point workloads, Intel’s 5.9% edge is real but smaller, suggesting AMD remains competitive in scientific computing that leans on FPU throughput.

The data compression result is interesting: AMD wins by 15.2%, which aligns with its integer math strength since compression algorithms are integer-heavy. Random string sorting goes Intel’s way by just 4.8%, implying this is a near-toss-up. Extended instructions favor Intel by 19.2%, and prime number finding favors Intel by 27%, both pointing to Intel’s stronger branch prediction and instruction-level parallelism.

Architecture Differences

The two processors come from fundamentally different design philosophies. The AMD EPYC 7C13 uses a 7 nm process from TSMC with 33,200 million transistors spread across eight dies, each 81 mm² in size. It is built on the Zen 3 architecture, codenamed Milan, with 64 cores and 128 threads. The Intel Xeon 676X uses Intel’s own 5 nm process, with a die size of 2x 598 mm² (no transistor count is listed), and is built on the Granite Rapids architecture with 32 cores and 64 threads.

Cache hierarchies differ substantially. AMD provides 64 KB of L1 cache per core, 512 KB of L2 per core, and a massive 256 MB of shared L3 cache. Intel offers 112 KB of L1 per core, 2 MB of L2 per core, and 144 MB of shared L3. The AMD L3 is nearly double Intel’s, which helps in data-heavy workloads where shared cache hit rates matter. Intel’s larger per-core L1 and L2 caches support its high single-thread performance.

Memory support diverges by generation. AMD uses DDR4 with eight-channel memory and 204.8 GB/s bandwidth. Intel uses DDR5 with eight-channel memory and 409.6 GB/s bandwidth — exactly double the AMD bandwidth. This explains Intel’s advantage in memory-intensive tasks like random string sorting. PCIe connectivity also differs: AMD provides Gen 4 with 128 lanes, while Intel provides Gen 5 with 128 lanes, giving Intel twice the per-lane bandwidth for expansion.

Clock speeds favor Intel significantly: 2.80 GHz base and 4.90 GHz boost versus AMD’s 2.00 GHz base and 3.68 GHz boost. Intel’s 1.22 GHz boost advantage directly contributes to its single-thread wins. Power envelopes also differ, with Intel at 275W TDP versus AMD’s 225W TDP. Intel’s multiplier is unlocked, while AMD’s is not, and Intel is listed as having no integrated graphics, matching AMD’s lack of integrated graphics. Intel also has an unlocked multiplier, which AMD does not.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7C13 has 64 cores and 128 threads, exactly double the Intel Xeon 676X’s 32 cores and 64 threads.

Q: Why does the AMD EPYC 7C13 win in encryption despite having fewer single-thread performance?

A: The AMD part scores 114,769 in PassMark data encryption versus Intel’s 67,638, a 69.7% advantage. This likely stems from its 256 MB shared L3 cache and larger core count, which allow parallel cryptographic operations to stay resident in cache.

Q: How large is the Intel Xeon 676X’s single-thread advantage?

A: Intel wins PassMark single-thread with 4,015 versus AMD’s 2,618, a 34.8% gap. The same delta appears in Cinebench R15, R20, and R23 single-core tests, where Intel leads by 16.2% each time.

Q: What memory bandwidth does each processor support?

A: Intel supports DDR5 with eight-channel memory and 409.6 GB/s bandwidth. AMD supports DDR4 with eight-channel memory and 204.8 GB/s bandwidth. Intel’s bandwidth is exactly double.

Q: Which processor has the higher average benchmark score?

A: The AMD EPYC 7C13 has an average benchmark score of 167,788, while the Intel Xeon 676X has 158,540. However, both sit in the 98th percentile of all CPUs.

Q: What is the TDP difference between the two?

A: Intel has a 275W TDP, while AMD has a 225W TDP. Intel consumes 50W more at the thermal design power limit.

The Verdict

The data points to a clear split based on workload priorities. The Intel Xeon 676X is the faster processor for the majority of tasks measured, winning 13 of 16 head-to-head tests. Its strengths in single-thread performance, physics simulation, and Cinebench rendering make it suitable for engineering workstations, real-time simulation, and applications that rely heavily on per-core speed. The 4.90 GHz boost clock and DDR5 memory bandwidth of 409.6 GB/s provide a tangible advantage in latency-sensitive tasks.

However, the AMD EPYC 7C13 is not merely a consolation prize. Its 69.7% encryption lead and 38.8% integer math lead indicate that for security-focused workloads, database processing, and compression tasks, the AMD part is substantially faster despite lower clock speeds. The 64-core count and 256 MB L3 cache provide raw parallel throughput that Intel cannot match in these specific domains. For a server handling heavy encryption, data warehousing, or integer-heavy analytics, the AMD EPYC 7C13 is the data-backed choice.

The overall average benchmark scores are close enough to be notable: AMD at 167,788 versus Intel at 158,540, a 5.8% difference. Yet this average masks the workload-specific extremes. If the choice is between a machine that excels at everything except encryption and integer math (Intel) versus one that dominates encryption and integer math but trails elsewhere (AMD), the decision hinges on the actual workload mix. The data does not support a universal winner; it supports a use-case-driven selection.

Specification Differences

| Specification | AMD EPYC 7C13 | Intel Xeon 676X |

|---|---|---|

| Cores | 64 | 32 |

| Threads | 128 | 64 |

| Base Clock | 2000.00 MHz | 2.80 GHz |

| Boost Clock | 3.68 GHz | 4.90 GHz |

| TDP | 225W | 275W |

| Socket | AMD Socket SP3 | Intel Socket 4710 |

| Architecture | Zen 3 (Milan) | Granite Rapids |

| Process Node | 7 nm (TSMC) | 5 nm (Intel) |

| Die Size | 8x 81 mm² | 2x 598 mm² |

| L1 Cache | 64 KB per core | 112 KB per core |

| L2 Cache | 512 KB per core | 2 MB per core |

| L3 Cache | 256 MB shared | 144 MB shared |

| Memory Support | DDR4 | DDR5 |

| Memory Bandwidth | 204.8 GB/s | 409.6 GB/s |

| PCIe | Gen 4, 128 Lanes | Gen 5, 128 Lanes |

| Integrated Graphics | None | N/A |

| Multiplier Unlocked | No | Yes |

| Release Date | Not listed | 2026-02-01 |

| Launch MSRP | Not listed | $2499 |