AMD EPYC 7763 vs Intel Xeon 6747P Comparison

Head-to-Head Benchmarks

The benchmark comparison between the Intel Xeon 6747P and AMD EPYC 7763 shows a dominant performance profile for the Intel part, with 11 wins out of 14 recorded head-to-head tests. The Intel Xeon 6747P takes the Cinebench suite decisively, posting a 20.2% advantage in all three multicore tests: R15 (8712 vs 7247), R20 (36301 vs 30198), and R23 (86432 vs 71902). This consistency across Cinebench versions indicates a scalable multicore advantage rather than a workload-specific anomaly.

The PassMark multithread test mirrors this result exactly, with the Intel Xeon 6747P scoring 101685 against the AMD EPYC 7763's 84591, again a 20.2% margin. The physics test shows the largest gap in the entire comparison, with the Intel part scoring 13398 versus 7708, a 73.8% advantage. This suggests a substantial lead in simulation and physics-based workloads.

The extended instructions test is another major Intel win, with a 45% delta (142557 vs 98294). The floating-point math test shows a 27.1% lead for Intel (365904 vs 287919), while the find prime numbers test shows a 72.3% advantage (1151 vs 668). Data compression also favors Intel, though by a smaller margin of 12.5% (1833378 vs 1628973).

Single-thread performance is not close. The Intel Xeon 6747P scores 3236 in the PassMark single-thread test against 2518 for the AMD EPYC 7763, a 28.5% lead. This is notable because the AMD part has a higher core count but cannot match Intel on per-thread throughput.

The AMD EPYC 7763 wins three tests. The most significant is data encryption, where it scores 121001 versus 90789, a 25% margin in favor of AMD. Integer math also goes to AMD, with a 9.4% lead (516920 vs 468518). The third AMD win is random string sorting, but it is narrow: 182676 vs 180382, a 1.3% delta. These results indicate that AMD retains an edge in certain integer-heavy and cryptographic operations, even as it loses the broader multicore and floating-point battles.

Architecture Differences

The two processors represent different design philosophies from different eras. The Intel Xeon 6747P is built on Granite Rapids architecture, a 5 nm design from Intel, with a die size of 2x 598 mm². The AMD EPYC 7763 uses Zen 3 architecture, codenamed Milan, fabricated on a 7 nm process by TSMC, with a die size of 8x 81 mm² and 33,200 million transistors.

Core configurations differ significantly. The Intel Xeon 6747P has 48 cores and 96 threads, while the AMD EPYC 7763 has 64 cores and 128 threads. Despite having fewer cores, the Intel part achieves higher multicore scores in most tests, indicating superior per-core efficiency and clock behavior. The Intel base clock is 2.70 GHz with a boost clock of 3.90 GHz, while the AMD part has a base clock of 2.45 GHz and a boost clock of 3.50 GHz.

Cache hierarchies are structured differently. The Intel Xeon 6747P has 112 KB of L1 cache per core, 2 MB of L2 cache per core, and 288 MB of shared L3 cache. The AMD EPYC 7763 has 64 KB of L1 per core, 512 KB of L2 per core, and 256 MB of shared L3 cache. The Intel L3 pool is larger by 32 MB, which may contribute to its advantage in data compression and extended instructions.

Memory support represents a generational split. The Intel Xeon 6747P uses DDR5 with an eight-channel memory bus and 409.6 GB/s of memory bandwidth. The AMD EPYC 7763 uses DDR4, also eight-channel, but with 204.8 GB/s of bandwidth, exactly half the Intel figure. This memory bandwidth difference is likely a major factor in the Intel lead across memory-intensive benchmarks.

PCIe capabilities also differ. The Intel part offers Gen 5 with 88 lanes (CPU only), while the AMD part provides Gen 4 with 128 lanes (CPU only). The Intel part has a higher per-lane bandwidth but fewer total lanes. Both support ECC memory, and neither has integrated graphics. The Intel part is newer, released in 2025, while the AMD part launched in 2021. The Intel part has a TDP of 330 watts, compared to 280 watts for the AMD part.

Where Each One Wins

The Intel Xeon 6747P is the clear choice for workloads that demand high multicore throughput, floating-point math, and physics simulation. Its 20.2% lead in Cinebench R23 multicore and 73.8% lead in physics show that rendering, simulation, and scientific computing tasks will run substantially faster. The 45% advantage in extended instructions suggests the Intel part is better suited for AVX-heavy and specialized instruction workloads. The 28.5% single-thread lead means that lightly threaded applications, database queries, and latency-sensitive tasks will also favor Intel.

The AMD EPYC 7763 wins in encryption workloads, with a 25% lead in data encryption, making it the stronger option for cryptographic operations and secure communication processing. Its 9.4% lead in integer math indicates an advantage in certain integer-heavy algorithms, though the margin is moderate. The narrow win in random string sorting (1.3%) is unlikely to be decisive in real-world deployments.

The core count difference matters for highly parallel workloads that scale linearly with threads. The AMD EPYC 7763 offers 64 cores versus 48, a 33% core advantage, yet the Intel part still wins most multicore tests. This suggests that thread count alone does not translate into performance with these architectures. The AMD part may still be preferable for workloads that are specifically designed to saturate many cores and are not memory-bandwidth limited, but the data shows Intel wins where memory bandwidth and per-core efficiency are the limiting factors.

FAQ

Q: Which processor has a higher Cinebench R23 multicore score?

A: The Intel Xeon 6747P scores 86432, which is 20.2% higher than the AMD EPYC 7763's 71902.

Q: Does the AMD EPYC 7763 win any benchmark against the Intel Xeon 6747P?

A: Yes, the AMD EPYC 7763 wins data encryption (121001 vs 90789, a 25% margin), integer math (516920 vs 468518, a 9.4% margin), and random string sorting (182676 vs 180382, a 1.3% margin).

Q: What is the memory bandwidth difference between the two processors?

A: The Intel Xeon 6747P has 409.6 GB/s of memory bandwidth with DDR5, while the AMD EPYC 7763 has 204.8 GB/s with DDR4. The Intel part provides double the bandwidth.

Q: Which processor has more cores and threads?

A: The AMD EPYC 7763 has 64 cores and 128 threads, while the Intel Xeon 6747P has 48 cores and 96 threads.

Q: How large is the L3 cache on each processor?

A: The Intel Xeon 6747P has 288 MB of shared L3 cache, and the AMD EPYC 7763 has 256 MB of shared L3 cache.

Q: What is the single-thread performance delta?

A: The Intel Xeon 6747P scores 3236 in the PassMark single-thread test, which is 28.5% higher than the AMD EPYC 7763's score of 2518.

The Verdict

The benchmark data points clearly to the Intel Xeon 6747P as the superior performer for most workloads. It wins 11 of 14 head-to-head tests, including every Cinebench multicore test, the multithread test, physics, floating-point math, extended instructions, prime number finding, data compression, and single-thread tests. The consistent 20.2% multicore margin across Cinebench and PassMark multithread indicates a broad architectural advantage, not a narrow workload-specific one.

The AMD EPYC 7763 remains competitive in three areas: encryption, integer math, and random string sorting. For users whose dominant workloads are cryptographic processing or specific integer-heavy algorithms, the AMD part offers measurable benefits, particularly the 25% lead in data encryption. However, these are niche wins relative to the overall performance profile.

The Intel Xeon 6747P also carries a higher thermal envelope at 330 watts versus 280 watts, but the performance gains outweigh the power cost in most scenarios. The larger L3 cache, higher memory bandwidth, and newer process node all contribute to its dominance. The AMD EPYC 7763 offers more cores and more PCIe lanes (128 Gen 4 lanes vs 88 Gen 5 lanes), which may matter for specific I/O-intensive or massively parallel deployments.

The verdict from the data is straightforward: choose the Intel Xeon 6747P for general compute, rendering, simulation, floating-point workloads, and single-threaded performance. Choose the AMD EPYC 7763 only if encryption performance or integer math is the primary bottleneck, or if the higher core count and PCIe lane count are essential for the specific server configuration. The Intel part is the stronger all-around processor based on the recorded benchmark results.