Intel Xeon 6781P vs Intel Xeon 696X Comparison

The Intel Xeon 6781P and Intel Xeon 696X are both high-end Granite Rapids server/workstation parts, but they are engineered for different priorities. The data is unambiguous: the 6781P is the multi-core throughput champion, winning 12 of 14 head-to-head benchmarks, while the 696X is the single-thread speed leader, winning the remaining two. The 6781P delivers a 12.4% advantage in Cinebench multi-core tests and a massive 424.9% lead in the PassMark physics test, making it the clear choice for heavily parallel workloads. Conversely, the 696X offers a 15.8% higher single-thread score, suiting it for lightly threaded tasks and frequency-sensitive applications. The verdict is straightforward: choose the 6781P for raw parallel compute density, and the 696X for scenarios where per-core speed is paramount.

The Verdict

The benchmark data dictates a clear split based on workload type. For users running highly threaded applications—such as 3D rendering, scientific computing, or data compression—the Intel Xeon 6781P is the definitive pick. Its score of 100254 in Cinebench R23 multi-core surpasses the 696X’s 89227 by 12.4%, and it extends that same 12.4% margin across both Cinebench R15 (10105 vs 8994) and R20 (42106 vs 37475). The 6781P also dominates in PassMark’s physics test, scoring 17753 against the 696X’s 3382—a 424.9% advantage that suggests a substantial edge in simulation or physics-based workloads. Its wins in data compression (2441690 vs 2264907) and floating-point math (507406 vs 450164) further cement it as the compute-heavy workhorse.

The Intel Xeon 696X is the alternative for workloads that cannot utilize its 64 cores effectively. It wins the PassMark single-thread benchmark decisively, scoring 3742 versus the 6781P’s 3152, a 15.8% margin. This makes it the better choice for legacy software, real-time processing, or any application where single-core latency is the bottleneck. The 696X also offers a smaller but notable edge in integer math, scoring 572072 against the 6781P’s 584834—a 2.2% deficit that still favors the 6781P overall. For a mixed environment, the 6781P’s overall average benchmark score of 315524 versus the 696X’s 286102 (a 10.3% gap) suggests it is the more balanced performer, but the 696X’s single-thread lead is a decisive factor for specific niches.

Architecture Differences

Both processors share the same fundamental Granite Rapids architecture, built on Intel’s 5 nm process node, with a dual-die design measuring 2x 598 mm². They also feature identical cache hierarchies: 112 KB of L1 and 2 MB of L2 per core, plus a shared 336 MB L3 cache. The core counts differ significantly, however. The 6781P packs 80 cores and 160 threads, while the 696X has 64 cores and 128 threads. This 16-core difference explains the 6781P’s consistent lead in multi-threaded tests, as both chips share the same memory subsystem: eight-channel DDR5 with 409.6 GB/s of bandwidth and ECC support.

The clock speeds tell a contrasting story. The 6781P has a base clock of 2.00 GHz and a boost clock of 3.80 GHz, whereas the 696X operates at a higher 2.40 GHz base and a 4.80 GHz boost. This 1.0 GHz boost advantage is the primary driver behind the 696X’s single-thread win. Both chips are unlocked, but the 696X explicitly lists a multiplier unlocked status, suggesting headroom for overclocking that the 6781P does not advertise. The PCIe lane count also differs: the 6781P provides 136 Gen 5 lanes, while the 696X provides 128. Cache per core is identical, but the 6781P leverages its extra cores to boost aggregate L3 usage, even though the total shared pool is the same.

Head-to-Head Benchmarks

The 6781P’s dominance in multi-core is consistent across all Cinebench versions. In Cinebench R23, it scores 100254 versus 89227, a 12.4% delta. The same 12.4% margin appears in R20 (42106 vs 37475) and R15 (10105 vs 8994), indicating that the performance gap scales perfectly with thread count. PassMark’s multithread test mirrors this, with the 6781P scoring 117946 against the 696X’s 104974, again a 12.4% difference. These results align with the core count advantage: 80 cores versus 64 yields exactly 25% more threads, yet the actual performance gain is lower, suggesting the 696X’s higher clocks partially offset its core deficit.

The largest single delta is in PassMark’s physics test, where the 6781P scores 17753 versus the 696X’s 3382—a 424.9% blowout. This is an outlier that suggests the 696X may be severely handicapped in this specific workload, likely due to thread scheduling or cache latency. The 6781P also wins PassMark’s random string sorting by a wide 48.9% margin (268573 vs 180392), and extended instructions by 15.1% (199048 vs 172975). Data encryption shows a narrower 6.3% win for the 6781P (119623 vs 112529), while data compression is closer at 7.8% (2441690 vs 2264907). Floating-point math favors the 6781P by 12.7% (507406 vs 450164).

The 696X’s only victories are in PassMark’s single-thread tests, scoring 3742 versus 3152 in both the single_thread and singlethread variants, a 15.8% margin. It also narrowly loses integer math, 572072 versus 584834, a 2.2% gap that keeps the 6781P undefeated in that category. The find prime numbers test is another 6781P win, but the margin is enormous: 1687 versus 853, a 97.8% advantage that highlights the 6781P’s superior parallel execution in algorithmic workloads. Overall, the 6781P wins 12 benchmarks to the 696X’s 2, with the latter’s wins confined to single-threaded performance.

FAQ

Q: Which processor is faster in single-threaded applications?

A: The Intel Xeon 696X is faster, scoring 3742 in PassMark’s single-thread benchmark compared to the 6781P’s 3152, a 15.8% advantage. Its higher boost clock of 4.80 GHz versus 3.80 GHz is the key factor.

Q: Does the 6781P have a significant multi-core lead?

A: Yes, the 6781P leads by 12.4% in all three Cinebench multi-core tests (R15, R20, R23) and in PassMark’s multithread test. Its 80 cores versus 64 cores provide a 25% thread advantage, though clock speeds narrow the real-world margin.

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

A: The largest gap is in PassMark’s physics test, where the 6781P scores 17753 versus the 696X’s 3382, a 424.9% difference. This is the most dramatic divergence in the dataset.

Q: Are there any tests where the 696X wins?

A: Yes, the 696X wins the PassMark single-thread test by 15.8% (3742 vs 3152). It also comes close in integer math, but still loses to the 6781P by 2.2% (572072 vs 584834).

Q: Do both CPUs support the same memory and cache?

A: Both support eight-channel DDR5 with 409.6 GB/s bandwidth and ECC. They also have identical per-core L1 (112 KB) and L2 (2 MB) caches, plus a shared 336 MB L3 cache.

Q: Which chip has more PCIe lanes?

A: The 6781P provides 136 Gen 5 lanes, while the 696X provides 128 Gen 5 lanes, a difference of 8 lanes that may matter for expansion-heavy systems.

Where Each One Wins

The 6781P is the clear winner for any workload that scales with core count. Its 80 cores and 160 threads drive a 12.4% advantage in Cinebench multi-core, making it the superior choice for video rendering, 3D animation, and batch processing. The PassMark physics test result (17753 vs 3382) suggests a massive edge in simulation and physics engines, while the 48.9% lead in random string sorting points to strong performance in data processing and text manipulation tasks. The 6781P also wins in floating-point math (507406 vs 450164) and extended instructions (199048 vs 172975), making it ideal for scientific computing and financial modeling. Its 97.8% lead in find prime numbers indicates exceptional parallel algorithm execution, and its wins in data compression and encryption make it a robust choice for database and security workloads.

The 696X is the specialist for single-thread-bound tasks. Its 15.8% single-thread lead (3742 vs 3152) makes it preferable for legacy applications, real-time control systems, or any software that runs on one or two threads. The higher boost clock of 4.80 GHz provides low-latency responsiveness that the 6781P cannot match. In mixed workloads, the 696X’s 64 cores still offer substantial multi-thread capability, but the data shows it lags behind the 6781P in nearly every parallel test. For users who prioritize maximum frequency over raw throughput, the 696X is the answer; for everyone else, the 6781P’s aggregate performance wins.

Specification Differences

The two processors diverge on core count, clock speeds, and PCIe lanes, while sharing many core features. The 6781P has 80 cores and 160 threads, versus the 696X’s 64 cores and 128 threads. Base clocks are 2.00 GHz for the 6781P and 2.40 GHz for the 696X, with boost clocks of 3.80 GHz and 4.80 GHz respectively. The 6781P offers 136 Gen 5 PCIe lanes, while the 696X has 128. Both have a 350 W TDP and use the Intel Socket 4710. The 6781P is part of the Xeon 6 (Granite Rapids-SP) generation, while the 696X is from the Xeon 600 (Granite Rapids-WS) line. The 6781P is marked as having a locked multiplier, whereas the 696X is listed as unlocked. Their launch MSRPs are $8960 for the 6781P and $5599 for the 696X, and they have different part numbers (SRV5J vs SRWQ7).