Intel Core i9-7940X vs Intel Core i9-7960X Comparison

Intel Core i9-7940X vs Intel Core i9-7960X: two Skylake-X parts from the same 7th Generation X-Series family, both on the Intel Socket 2066 platform. The recorded data shows a clear split: the 16-core 7960X dominates in Cinebench workloads across the board, while the 14-core 7940X counters with decisive wins in both Geekbench tests. This analysis breaks down the architectural commonalities, the benchmark deltas, and the specification differences that drive these outcomes.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i9-7960X has 16 cores and 32 threads, while the Intel Core i9-7940X has 14 cores and 28 threads.

Q: In which benchmark does the 7940X achieve its largest margin of victory?

A: The 7940X leads by 9.1% in Geekbench single-core, scoring 1445 versus the 7960X's 1324. It also wins Geekbench multi-core by 2%, with scores of 10516 and 10307, respectively.

Q: How consistent is the 7960X's performance advantage in Cinebench?

A: It is perfectly consistent. The 7960X wins all six Cinebench tests (R15, R20, and R23, both multi-core and single-core) by exactly 8.4% in each case.

Q: What is the difference in L3 cache capacity?

A: The 7960X has 22 MB of shared L3 cache, while the 7940X has 19.25 MB. Both allocate 1 MB of L2 cache per core.

Q: Are these processors still in production?

A: No. Both parts have a production status of "End-of-life" in the database, with a release date of 2017-08-31.

Q: Do the two CPUs share the same memory bandwidth?

A: Yes. Both support DDR4 memory via a quad-channel bus, and both list a memory bandwidth of 85.3 GB/s.

Architecture Differences

Both processors are built on Intel's 14 nm process node, with a die size of 484 mm², and both use the Skylake architecture with the Skylake-X codename. They belong to the same Core i9 (X-Series 7th Gen) generation and share the same Intel Socket 2066. The fundamental architectural difference lies in the core count: the 7940X provides 14 physical cores and 28 threads, whereas the 7960X scales that to 16 cores and 32 threads. This two-core gap directly influences the shared L3 cache allocation, with the 7960X carrying 22 MB versus the 7940X's 19.25 MB. Per-core cache hierarchies remain identical: 64 KB of L1 and 1 MB of L2 per core on both chips.

The base clock rates differ notably. The 7940X runs at 3.10 GHz base, while the 7960X starts at 2.80 GHz. Both boost clocks are identical at 4.40 GHz, and both have an unlocked multiplier. The thermal design power is the same at 165 watts for each. Neither processor includes integrated graphics, and both lack ECC memory support. The PCIe configuration is also identical: Gen 3 with 44 lanes from the CPU only. The die size and process node being the same suggests that the 7960X simply enables more of the available silicon, but the recorded data does not specify transistor counts for either part.

Head-to-Head Benchmarks

The head-to-head results show a clean division of labor between the two chips. The 7960X wins six of the eight recorded benchmarks, all by a uniform 8.4% margin. In Cinebench R15 multi-core, the 7960X scores 2359 against the 7940X's 2161. The single-core R15 test follows the same pattern: 333 for the 7960X versus 305 for the 7940X. Moving to Cinebench R20, the 7960X posts 9833 in multi-core and 1388 in single-core, compared to 9006 and 1271 for the 7940X. In Cinebench R23, the 7960X reaches 23413 multi-core and 3305 single-core, while the 7940X manages 21444 and 3027, respectively. The consistency of that 8.4% delta across all three Cinebench generations and both single and multi-threaded modes indicates a scalable performance advantage tied directly to the extra two cores and the higher L3 cache, despite the 7960X's lower base clock.

The 7940X, however, flips the script in Geekbench. In Geekbench single-core, the 7940X scores 1445, which is 9.1% higher than the 7960X's 1324. In Geekbench multi-core, the 7940X wins by a narrower 2% margin, 10516 versus 10307. This is a significant divergence. The single-core Geekbench result is particularly telling, as the 7940X's higher base clock of 3.10 GHz likely contributes to its advantage in workloads that do not scale with core count. The multi-core Geekbench win for the 7940X is more surprising given the 7960X's core advantage, but the recorded data shows that Geekbench's multi-core test favors the 7940X's configuration.

Interpreting the average benchmark scores places these chips in context. The 7940X has an average benchmark score of 6147, while the 7960X averages 6533. The 7940X sits at the 61st percentile among all CPUs, and its nearest rivals include the AMD EPYC 7501 (avg score 6128, delta of 0.3%) and the AMD EPYC 7272 (avg score 6186, delta of -0.6%). The 7960X reaches the 62nd percentile, with its closest competitor being the Intel Xeon W-2191B at an identical average score of 6531 (0% delta). The 7960X's average score is roughly 6.3% higher than the 7940X's, which aligns with its dominance in the Cinebench suite.

Specification Differences

The two processors differ in a limited set of specifications. The core count is the primary divergence: 14 cores for the 7940X versus 16 cores for the 7960X, with corresponding thread counts of 28 and 32. Base clock speeds differ, with the 7940X at 3.10 GHz and the 7960X at 2.80 GHz. The L3 cache is larger on the 7960X at 22 MB shared, compared to 19.25 MB shared on the 7940X. The launch MSRP differs as well, with the 7940X listed at $1399 and the 7960X at $1699. The part numbers are distinct: SR3RQ for the 7940X and SR3RR for the 7960X.

All other specification fields are identical. Both have a boost clock of 4.40 GHz, a TDP of 165 watts, the same Intel Socket 2066, the same Skylake architecture and codename, the same 14 nm process node, the same 484 mm² die size, and the same foundry (Intel). Memory support is identical: DDR4 with a quad-channel bus, 85.3 GB/s bandwidth, and no ECC. Both offer Gen 3 PCIe with 44 CPU lanes, have no integrated graphics, target the desktop market segment, are end-of-life, and have unlocked multipliers. The release date is the same for both: 2017-08-31.

The Verdict

The data points to a straightforward choice for multi-threaded rendering workloads. The Core i9-7960X is the superior part for Cinebench-style tasks, delivering a consistent 8.4% advantage across all tested versions and thread counts. Its 16 cores and 32 threads, paired with 22 MB of L3 cache, translate directly into higher multi-core scores. The 7960X also holds a higher average benchmark score (6533 versus 6147) and a slightly better percentile ranking (62nd versus 61st). For users whose primary applications resemble Cinebench's rendering pipeline, the 7960X is the stronger pick.

The Core i9-7940X, however, should not be dismissed. Its Geekbench results show a clear edge: 9.1% higher single-core performance and 2% higher multi-core performance compared to the 7960X. The 7940X's higher base clock of 3.10 GHz likely explains the single-core Geekbench lead. For workloads that follow Geekbench's scaling behavior, particularly those sensitive to per-thread performance, the 7940X offers a measurable benefit. The 7940X also carries a lower launch MSRP of $1399 versus $1699, though the analysis here focuses strictly on performance metrics.

In summary, the 7960X wins the majority of head-to-head benchmarks (6 out of 8) and is the recommended choice for heavily threaded, render-oriented workloads. The 7940X wins the Geekbench pair, making it the better option for users whose software behaves more like Geekbench, where the higher clock speed and slightly different cache configuration yield better results. Both chips share identical platform features, power envelopes, and memory support, so the decision rests entirely on which benchmark suite aligns with the user's actual applications.