AMD EPYC 7643P vs Intel Xeon 6710E Comparison

The AMD EPYC 7643P and Intel Xeon 6710E represent two distinct philosophies for server processing. The EPYC 7643P, a 48-core Zen 3 part, and the Xeon 6710E, a 64-core Sierra Forest chip, target similar workloads but achieve performance through different means. The recorded benchmark data shows a decisive overall victory for the AMD part, which won 16 out of 17 head-to-head comparisons. However, the nature of those wins and the architectural differences between the two processors point to specific use cases where each excels.

Where Each One Wins

The performance split is stark. The AMD EPYC 7643P dominates the vast majority of compute-heavy and single-threaded tasks. Its largest margins come in the PassMark physics test, where it scores 8002 against the Xeon's 5000, a 60% advantage. This indicates a significant edge in workloads that rely on simulation and real-time physical calculations. Similarly, in the PassMark single-thread test, the EPYC 7643P scores 2655, which is 39% higher than the Xeon 6710E's 1910. This single-thread superiority cascades across the Cinebench suite, where the AMD part leads by roughly 25% in every test, from R15 to R23, in both single-core and multi-core runs.

The Intel Xeon 6710E's sole victory comes in the PassMark floating-point math test, scoring 219926 against the AMD's 216592, a margin of 1.5%. While narrow, this is a notable data point for workloads that are heavily reliant on floating-point operations. For every other metric, the EPYC 7643P is the clear leader. This includes integer math, where the AMD part scores 390775 versus 302954, a 29% lead, and data encryption, where it scores 95606 versus 81850, a 16.8% lead. The EPYC 7643P also wins in data compression, extended instructions, random string sorting, and the PassMark multithread score, with margins ranging from 5.8% to 25.1%.

From this data, the AMD EPYC 7643P is the superior choice for general-purpose compute, database workloads, and any application where per-core performance and single-threaded responsiveness are critical. The Intel Xeon 6710E, with its high core count but single-thread deficit, finds its niche only in specific floating-point-heavy applications, though the margin there is slight.

Architecture Differences

The fundamental divergence between these two processors lies in their architecture and design goals. The AMD EPYC 7643P is built on the Zen 3 architecture, using the Milan codename and manufactured on a 7 nm process at TSMC. It features 48 cores and 96 threads, relying on simultaneous multithreading to double its thread count. Its cache layout includes 64 KB of L1 per core, 512 KB of L2 per core, and a large 256 MB shared L3 cache. This design is optimized for high instructions-per-clock and low latency.

In contrast, the Intel Xeon 6710E uses the Sierra Forest architecture, also its codename, and is manufactured on a 5 nm process at Intel. It has 64 cores, but only 64 threads, meaning it does not use hyperthreading and is designed with efficiency cores in mind. Its cache structure is different: 96 KB of L1 per core, 4 MB of L2 per module, and a shared 96 MB L3 cache. The Intel processor also has a larger die size at 578 mm² compared to the AMD's 8x 81 mm² configuration.

Memory support also differs significantly. The EPYC 7643P supports DDR4 memory with an eight-channel bus, providing 204.8 GB/s of bandwidth. The Xeon 6710E supports DDR5 memory, also on an eight-channel bus, but achieves a much higher 358.4 GB/s of bandwidth. This memory bandwidth advantage for the Intel part is a key architectural difference, though it did not translate into overall benchmark victory. Finally, the AMD part offers PCIe Gen 4 with 128 lanes, while the Intel part offers PCIe Gen 5 with 88 lanes.

The Verdict

The data is unambiguous. The AMD EPYC 7643P is the better performer in nearly every recorded benchmark. Its 16 wins out of 17 comparisons, including substantial leads in physics, single-thread, and integer math, make it the recommended choice for virtually all server and workstation scenarios. The 98th percentile ranking among all CPUs, compared to the Xeon's 97th, corroborates this. Users should select the EPYC 7643P when they need maximum throughput in multi-threaded workloads, strong single-core performance for legacy or poorly optimized software, and high efficiency in data processing tasks.

The Intel Xeon 6710E is only a viable option for a very specific use case. Its sole win in floating-point math suggests it could be considered for scientific computing or financial modeling that relies heavily on FPU operations, though the 1.5% margin is small. Its higher memory bandwidth (358.4 GB/s versus 204.8 GB/s) and DDR5 support are future-proofing advantages, but the benchmark results do not show these translating into real-world performance wins in the tests recorded. Therefore, the Xeon 6710E is a niche choice for those who prioritize memory bandwidth and specific FP-heavy workloads, while the EPYC 7643P is the versatile, high-performance default.

FAQ

Q: Which processor has more cores?

A: The Intel Xeon 6710E has more physical cores with 64, while the AMD EPYC 7643P has 48 cores.

Q: Which processor has more threads?

A: The AMD EPYC 7643P has more threads with 96, compared to the Intel Xeon 6710E's 64 threads.

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

A: The largest gap is in the PassMark physics test, where the AMD EPYC 7643P is 60% ahead of the Intel Xeon 6710E.

Q: In which benchmark does the Intel Xeon 6710E outperform the AMD EPYC 7643P?

A: The Intel Xeon 6710E wins only in the PassMark floating-point math test, scoring 219926 versus 216592.

Q: Which processor offers higher memory bandwidth?

A: The Intel Xeon 6710E offers higher memory bandwidth at 358.4 GB/s, while the AMD EPYC 7643P offers 204.8 GB/s.

Q: How do their single-core performances compare?

A: The AMD EPYC 7643P is significantly faster in single-core tests, with a 39% lead in PassMark single-thread and roughly 25% leads across all Cinebench single-core tests.

Head-to-Head Benchmarks

The most decisive victories for the AMD EPYC 7643P are in the PassMark physics test and the single-thread tests. In physics, the score of 8002 against 5000 represents a 60% delta, indicating a massive advantage in handling complex physical simulations. In the PassMark single-thread and singlethread tests, the EPYC 7643P's score of 2655 is 39% higher than the Xeon 6710E's 1910. This pattern repeats in the Cinebench suite, where the AMD part consistently leads by 25.1% in R20 and R23 multi-core, and 25.1% in R20 and R23 single-core, with a 25.2% lead in R15 multi-core and 25% in R15 single-core.

The AMD part also shows strong leads in integer math, scoring 390775 versus 302954 for a 29% delta, and in data encryption, scoring 95606 versus 81850 for a 16.8% delta. The PassMark multithread score shows a 25.1% advantage (77307 versus 61775). Smaller but still notable wins include data compression (7.7%), extended instructions (13%), and random string sorting (5.8%).

The Intel Xeon 6710E's only victory is in floating-point math, where it scores 219926 versus 216592. This 1.5% delta is the narrowest margin in the entire comparison, making it a minimal advantage. The data shows that despite the Xeon's higher core count and memory bandwidth, the AMD EPYC 7643P's architecture provides superior results in all but one of the tested workloads.

Specification Differences

The two processors differ in several core specifications. The AMD EPYC 7643P has 48 cores and 96 threads, while the Intel Xeon 6710E has 64 cores and 64 threads. Base clocks are similar, with the AMD at 2.30 GHz and the Intel at 2.40 GHz, but the boost clocks differ: the AMD boosts to 3.60 GHz, while the Intel boosts to 3.20 GHz. The TDP is lower for the Intel part at 205 watts, compared to the AMD's 225 watts.

The AMD EPYC 7643P uses the AMD Socket SP3, while the Intel Xeon 6710E uses the Intel Socket 4710. The process nodes differ, with AMD on 7 nm and Intel on 5 nm. Cache structures are distinct: the AMD has 64 KB L1 per core, 512 KB L2 per core, and 256 MB shared L3, while the Intel has 96 KB L1 per core, 4 MB L2 per module, and 96 MB shared L3. Memory support is DDR4 for AMD and DDR5 for Intel, though both use eight-channel buses. Memory bandwidth is 204.8 GB/s for the AMD and 358.4 GB/s for the Intel. PCIe support also differs: the AMD offers Gen 4 with 128 lanes, and the Intel offers Gen 5 with 88 lanes. The release dates are September 2023 for the AMD and June 2024 for the Intel.