Intel Xeon 6747P vs Intel Xeon 6774P Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive overall advantage for the Intel Xeon 6774P, which wins 12 of the 14 head-to-head benchmark comparisons. The margin of victory, however, is not uniform across workloads. The largest single gap appears in PassMark random string sorting, where the 6774P scores 262417 against the 6747P's 180382, a delta of 45.5%. This suggests a pronounced advantage in memory access patterns and data shuffling operations, likely stemming from the larger shared cache and higher core count.

In floating-point math, the 6774P posts 465314 versus 365904 for the 6747P, a 27.2% advantage. Integer math follows closely, with the 6774P at 593440 against 468518, a 26.7% lead. Data encryption shows a similar pattern: 115025 versus 90789, again a 26.7% edge. Extended instructions, which often reflect SIMD and specialized compute throughput, favor the 6774P by 24.4%, with scores of 177273 versus 142557. Data compression yields a 26% gap, with 2309868 against 1833378.

The Cinebench suite presents a consistent picture. In R15 multicore, the 6774P scores 9660 versus 8712 for the 6747P, a 10.9% lead. R20 multicore shows 40251 against 36301, also 10.9%. R23 multicore repeats the exact same delta, with 95836 versus 86432. This uniformity across the three Cinebench iterations indicates that the performance difference scales cleanly with the core count differential, without any unexpected architectural throttling or scaling inefficiencies.

PassMark multithread reinforces the Cinebench result: 112749 versus 101685, a 10.9% gap. Physics simulation favors the 6774P by 19.6%, with 16023 against 13398. Prime number finding shows a smaller 9.8% edge, with 1264 versus 1151, suggesting that this particular workload is less sensitive to core count and more dependent on per-core integer throughput.

The only two victories for the Intel Xeon 6747P come in single-thread tests. Both PassMark single-thread and single-thread (duplicate entries in the database) show the 6747P at 3236 against the 6774P's 3047, a 5.8% advantage. This is notable because both processors share the same 3.90 GHz boost clock, yet the 6747P achieves higher single-core performance. The likely explanation lies in the higher base clock of 2.70 GHz for the 6747P versus 2.50 GHz for the 6774P, which may allow the 6747P to sustain higher clocks under lighter single-thread loads without hitting thermal or power constraints.

Architecture Differences

Both processors belong to the Granite Rapids generation, built on the same Intel 5 nm process with a dual-die design measuring 2x 598 mm². They share the same socket, Intel Socket 4710, and both support DDR5 memory across an eight-channel bus with a peak bandwidth of 409.6 GB/s. ECC memory is supported on both. Neither includes integrated graphics, and both are unlocked for overclocking, though that feature is largely irrelevant in server contexts.

The core and thread counts are the primary differentiators. The Intel Xeon 6774P packs 64 cores and 128 threads, while the Intel Xeon 6747P has 48 cores and 96 threads. This 16-core, 32-thread difference directly explains the consistent 10.9% multicore deltas observed in Cinebench and PassMark multithread tests. The 6774P's L3 cache is 336 MB shared, compared to 288 MB shared on the 6747P, a 48 MB difference that contributes to the larger margins in cache-sensitive workloads like random string sorting and data compression. Per-core L1 (112 KB) and L2 (2 MB) caches are identical across both.

PCIe lane allocation differs substantially. The 6774P supports 136 lanes (CPU only) of Gen 5 connectivity, while the 6747P provides 88 lanes. This matters for systems with many high-bandwidth peripherals, GPUs, or storage controllers. The thermal design power also differs: 350 W for the 6774P versus 330 W for the 6747P. The 20 W gap is modest relative to the core count increase, indicating that the 6774P maintains reasonable power efficiency for its additional compute resources.

Both processors were released in 2025, but the 6747P launched earlier on February 23, 2025, while the 6774P followed on May 21, 2025. The launch MSRP for the 6774P is $6760, and for the 6747P it is $6497. The part numbers are SRWPC for the 6774P and SRVEZ for the 6747P.

Where Each One Wins

The Intel Xeon 6774P is the clear choice for heavily threaded throughput workloads. Its 64 cores deliver substantial advantages in data compression (26%), encryption (26.7%), floating-point math (27.2%), and integer math (26.7%). For database operations, analytics, scientific computing, and any workload that can saturate many cores, the 6774P provides a meaningful performance uplift. The 45.5% lead in random string sorting is particularly striking and indicates that the larger L3 cache and core count combine to accelerate memory-intensive sorting and partitioning tasks. The 19.6% advantage in physics simulation further supports its suitability for computational modeling and simulation workloads.

The Intel Xeon 6747P, despite losing the majority of comparisons, holds a specific edge in single-threaded performance. Its 5.8% lead in PassMark single-thread tests, with a score of 3236 versus 3047, makes it preferable for lightly threaded applications, legacy software with limited parallelism, or scenarios where per-core latency is more critical than aggregate throughput. The higher base clock of 2.70 GHz likely contributes to this advantage. For workloads that are latency-bound rather than throughput-bound, such as certain real-time processing tasks or interactive database queries with low concurrency, the 6747P may deliver snappier responses.

The 6747P also benefits from lower power consumption, with a 330 W TDP versus 350 W for the 6774P. In dense server deployments where thermal and power budgets are tight, this 20 W savings per socket can accumulate across many nodes. Additionally, the 88 PCIe lanes on the 6747P are still ample for many dual-socket configurations, and the 48-core count may be sufficient for mid-tier virtualization or container orchestration workloads.

The Verdict

The data strongly favors the Intel Xeon 6774P for general-purpose server workloads. Its 12 benchmark wins out of 14 comparisons, with deltas ranging from 9.8% to 45.5%, establish it as the higher-performing processor in nearly every measurable category. The 27.2% lead in floating-point math and 26.7% in integer math are substantial and will translate directly into faster execution for compute-intensive applications. The 45.5% advantage in random string sorting suggests that the 6774P excels in data manipulation tasks common in big data processing pipelines.

The Intel Xeon 6747P is not without merit, but its strengths are narrower. The single-thread performance lead of 5.8% is real and relevant for certain niches. However, given that both processors share the same boost clock and architecture, the 6747P's advantage is limited to scenarios where the software cannot utilize more than a handful of cores. For most modern server workloads, which are increasingly multi-threaded, the 6774P offers more headroom and future-proofing.

The 48 MB additional L3 cache on the 6774P is another significant factor, as it directly improves performance in cache-resident workloads. The larger PCIe lane allocation (136 versus 88) also makes the 6774P more suitable for accelerator-heavy systems. Organizations planning to deploy GPUs, NVMe storage arrays, or high-speed networking should factor this into their decision.

In summary, the Intel Xeon 6774P is the superior choice for high-core-count, throughput-oriented deployments. The Intel Xeon 6747P is a reasonable alternative for single-thread-sensitive applications or power-constrained environments, but the benchmark data indicates that the 6774P provides a more balanced and broadly superior performance profile.

FAQ

Q: Which processor has more cores?

A: The Intel Xeon 6774P has 64 cores and 128 threads, while the Intel Xeon 6747P has 48 cores and 96 threads.

Q: What is the single-thread performance difference?

A: The Intel Xeon 6747P wins the PassMark single-thread test with a score of 3236 versus 3047 for the 6774P, giving the 6747P a 5.8% advantage.

Q: How much larger is the L3 cache on the 6774P?

A: The Intel Xeon 6774P has 336 MB of shared L3 cache, while the Intel Xeon 6747P has 288 MB, a difference of 48 MB.

Q: Do both processors support the same memory configuration?

A: Yes, both support DDR5 memory with an eight-channel bus and a peak bandwidth of 409.6 GB/s, and both support ECC memory.

Q: What is the power consumption difference?

A: The Intel Xeon 6774P has a TDP of 350 W, while the Intel Xeon 6747P has a TDP of 330 W, a difference of 20 W.

Q: Which processor has more PCIe lanes?

A: The Intel Xeon 6774P supports 136 Gen 5 lanes (CPU only), while the Intel Xeon 6747P supports 88 Gen 5 lanes (CPU only).