Intel Xeon 6781P vs Intel Xeon 6960P Comparison

The Intel Xeon 6960P and Intel Xeon 6781P are both Granite Rapids parts, but they aim at different corners of the server market. The 6960P is the flagship AP variant with a massive L3 cache and higher clocks; the 6781P is the SP variant with more cores but a lower power ceiling. Benchmark results show a clear split: the 6960P dominates in most throughput and latency-sensitive tasks, while the 6781P counters with wins in two specific integer workloads. The data below quantifies exactly where each chip earns its keep.

Head-to-Head Benchmarks

The Xeon 6960P takes 12 of the 14 head-to-head comparisons, and several of those wins are decisive. In Cinebench multi-core tests, the 6960P leads by a consistent 10.8% across all three versions: R15 (11194 vs 10105), R20 (46645 vs 42106), and R23 (111060 vs 100254). That consistency suggests a clock-speed advantage rather than a core-count one, which makes sense given the 6960P's higher base and boost clocks. The same 10.8% margin appears in PassMark's multithread score (130659 vs 117946), reinforcing that the 6960P's per-thread efficiency carries its overall throughput.

The biggest gap comes in PassMark physics, where the 6960P scores 24937 versus 17753 — a 40.5% advantage. This is a physics simulation workload that is typically sensitive to memory latency and cache hierarchy, and the 6960P's 432 MB of shared L3 versus 336 MB on the 6781P likely explains the disproportionate lead. Random string sorting shows a similar pattern: 371795 vs 268573, a 38.4% win for the 6960P. Sorting algorithms depend heavily on memory access patterns, so the larger cache and faster memory subsystem (614.4 GB/s vs 409.6 GB/s) pay off handsomely here.

Data encryption is another area where the 6960P runs away: 162013 vs 119623, a 35.4% lead. Integer math also favors the 6960P heavily, at 727750 vs 584834 (24.4% ahead). Data compression is a 14.6% win for the 6960P (2797724 vs 2441690). Floating-point math goes to the 6960P by a narrower 4% margin (527473 vs 507406), while single-thread performance is a modest 4.3% win (3287 vs 3152).

The 6781P's two wins are worth noting for their specificity. In extended instructions, it scores 199048 versus 193404, a 2.8% edge. That test covers AVX-512 and other vectorized workloads, and the 6781P's 80 cores versus 72 may be doing the heavy lifting here. The other win is find prime numbers, where the 6781P posts 1687 versus 1484 — a 12% margin. This is a pure integer sieve benchmark that scales well with core count, and the 6781P's 8 extra cores give it a real advantage. Neither win is large in absolute terms, but they show that the 6781P is not simply a slower copy of its bigger sibling.

Where Each One Wins

The Xeon 6960P is the clear choice for workloads that are latency-bound or memory-bandwidth-hungry. Its 40.5% lead in physics and 38.4% lead in random string sorting point to tasks where cache size and memory speed matter more than raw core count. The 35.4% encryption advantage and 24.4% integer math lead also suggest it handles security workloads, database indexing, and integer-heavy computations with noticeably more headroom. The consistent 10.8% margins across Cinebench and multithread indicate that general multi-core rendering and simulation tasks will finish roughly a tenth faster on the 6960P.

The Xeon 6781P's wins are narrower but real. Its 12% edge in find prime numbers and 2.8% edge in extended instructions show that core-count-scalable integer loops and vectorized instruction streams benefit from its 80-core configuration. If a workload is embarrassingly parallel and does not saturate memory bandwidth, the 6781P's extra cores can close the gap or pull ahead. However, the 4% floating-point deficit means it is not universally better at math-heavy tasks — the 6960P still wins there.

For mixed workloads, the 6960P's single-thread advantage (4.3%) is the tiebreaker. The data suggests that the 6960P is the safer bet for unpredictable workloads that combine latency-sensitive single-threaded sections with heavy multi-threaded phases. The 6781P is more specialized, appealing to environments where core count is the sole bottleneck and memory pressure is low.

FAQ

Q: Which CPU has more cores?

A: The Intel Xeon 6781P has 80 cores and 160 threads, while the Intel Xeon 6960P has 72 cores and 144 threads.

Q: Does the 6960P always beat the 6781P in benchmarks?

A: No. The 6781P wins in PassMark extended instructions (199048 vs 193404) and find prime numbers (1687 vs 1484), though the 6960P wins the other 12 head-to-head tests.

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

A: The PassMark physics test shows the biggest gap, with the 6960P scoring 24937 versus 17753, a 40.5% advantage.

Q: How do their memory systems differ?

A: The 6960P supports twelve-channel DDR5 with 614.4 GB/s bandwidth, while the 6781P uses eight-channel DDR5 with 409.6 GB/s bandwidth. Both support ECC memory.

Q: Which CPU has more L3 cache?

A: The 6960P has 432 MB of shared L3, while the 6781P has 336 MB. Both have 112 KB L1 and 2 MB L2 per core.

Q: What is the single-thread performance difference?

A: The 6960P scores 3287 in PassMark single-thread, which is 4.3% ahead of the 6781P's 3152.

Specification Differences

The two CPUs diverge on almost every key specification except for the core microarchitecture. The 6960P uses the Granite Rapids-AP generation and fits the Intel Socket 7529, while the 6781P is Granite Rapids-SP on Intel Socket 4710. The 6960P packs 72 cores and 144 threads with a 2.70 GHz base clock and 3.90 GHz boost; the 6781P has 80 cores and 160 threads but lower clocks at 2.00 GHz base and 3.80 GHz boost. Power envelopes differ substantially: the 6960P has a 500 W TDP versus 350 W for the 6781P.

Cache hierarchies are split by design. The 6960P carries 432 MB of shared L3, whereas the 6781P has 336 MB — a 96 MB difference. Both share the same per-core L1 (112 KB) and L2 (2 MB) sizes. Memory support also diverges: the 6960P runs twelve-channel DDR5 with 614.4 GB/s bandwidth, while the 6781P uses eight-channel DDR5 at 409.6 GB/s. PCIe lanes favor the 6781P, which offers 136 Gen 5 lanes versus 96 on the 6960P. The die configuration differs too, with the 6960P using a 3x 598 mm² setup and the 6781P using 2x 598 mm².

Release timing favors the 6781P, which launched on 2025-02-23, about five months after the 6960P's 2024-09-23 debut. The 6960P's launch MSRP is $9625, and the 6781P's launch MSRP is $8960. Both are active production parts with no integrated graphics and no unlocked multiplier.

Architecture Differences

Both CPUs are built on Intel's 5 nm process at Intel foundries, and both use the Granite Rapids core design. The key architectural difference is the package: the 6960P is a Granite Rapids-AP (Advanced Performance) part with three 598 mm² dies, while the 6781P is Granite Rapids-SP (Standard Performance) with two 598 mm² dies. That extra die on the 6960P provides the larger 432 MB L3 cache and the twelve-channel memory controller, which explains its bandwidth advantage.

The core counts tell a different story. The 6781P has 80 cores to the 6960P's 72, meaning the 6781P fits more cores per die (40 per die versus 24 per die on the 6960P). This suggests the 6960P's dies are optimized for cache and memory throughput rather than pure core density. The 6781P's higher core count also drives its win in find prime numbers, where 8 additional cores provide a 12% advantage despite lower clocks.

The memory architectures reflect their market positions. The 6960P's twelve-channel DDR5 controller with 614.4 GB/s bandwidth is a hallmark of an AP-class part designed for maximum memory throughput. The 6781P's eight-channel controller at 409.6 GB/s is more conventional for SP parts, but its 136 PCIe Gen 5 lanes exceed the 6960P's 96 lanes, making it better suited for systems with many GPUs or NVMe drives.

TDP is another architectural signal. The 6960P's 500 W TDP is a full 150 W higher than the 6781P's 350 W, aligning with its higher clocks and larger cache. The 6781P's lower TDP allows for more standard cooling and power delivery, while the 6960P demands serious server infrastructure.

The Verdict

Pick the Intel Xeon 6960P if your workloads are memory-bound or latency-sensitive. The data is unambiguous: 40.5% faster in physics, 38.4% faster in random string sorting, and 35.4% faster in encryption. The 432 MB L3 cache and 614.4 GB/s memory bandwidth deliver disproportionate gains in these areas, and the consistent 10.8% lead across Cinebench and multithread makes it the better all-rounder for rendering, simulation, and database workloads. The 4.3% single-thread advantage also helps in mixed workloads where some threads cannot be parallelized. Its 500 W TDP and twelve-channel memory requirements mean you need a robust platform, but the performance payoff is clear.

Pick the Intel Xeon 6781P if core count is your primary constraint and your workloads are integer-scalable with low memory pressure. Its 80 cores provide a 12% win in find prime numbers and a 2.8% win in extended instructions, making it the better choice for specific vectorized or sieve-style integer loops. The 136 PCIe Gen 5 lanes also make it more flexible for I/O-heavy systems with many accelerators. The lower 350 W TDP and eight-channel memory make it easier to deploy in standard server chassis. However, the 4% floating-point deficit and 4.3% single-thread gap mean it is not a universal upgrade; it wins only where core count dominates.

The benchmark results ultimately favor the 6960P in the aggregate — 12 wins versus 2 — and its wins are larger in magnitude. The 6781P's victories are narrow, and its overall average benchmark score of 315524 trails the 6960P's 365194 by roughly 13.6%. The 6960P also ranks in the 100th percentile among all CPUs, while the 6781P sits at the 99th percentile. For most buyers, the 6960P's advantages in cache, memory bandwidth, and clock speed will translate into faster real-world performance, especially in large-scale virtualization, analytics, and high-performance computing where memory latency is the bottleneck.