Intel Core i5-7400 vs Intel Core i9-9960X Comparison

The Intel Core i5-7400 and Intel Core i9-9960X occupy completely different tiers of Intel’s desktop lineup, and the benchmark data reflects a total mismatch in capability. The i9-9960X wins every single head-to-head test recorded in the database, with margins ranging from a modest 25.3% in Geekbench single-core to a dominant 81.5% in every Cinebench workload. The i5-7400, a 4-core, 4-thread Kaby Lake part, is an entry-level desktop processor, while the i9-9960X is a 16-core, 32-thread Skylake-X flagship. The data shows no scenario where the i5-7400 outperforms its larger sibling; the only question is how large the gap is in each type of workload.

Where Each One Wins

The i9-9960X wins in every recorded category, but the scale of its advantage varies by workload type. The smallest lead appears in Geekbench single-core, where the i9-9960X scores 1396 against the i5-7400’s 1043, a 25.3% advantage. This is the only test where the i5-7400 comes within striking distance, which suggests that its per-core architecture, despite being older and lower-clocked, is not completely outclassed in lightly threaded tasks. However, the i5-7400’s single-core score still lags behind, so even in this best-case scenario, it is not competitive.

In multi-threaded workloads, the i9-9960X is in a different league entirely. The Cinebench R23 multi-core test shows the i9-9960X scoring 25120 versus the i5-7400’s 4658, an 81.5% difference. Similarly, Geekbench multi-core shows the i9-9960X at 10512 against the i5-7400’s 2740, a 73.9% gap. These results indicate that the i9-9960X is the clear choice for rendering, video encoding, scientific computing, and any workload that scales across cores. The i5-7400, with only four threads, simply cannot feed enough parallel work to the scheduler to compete.

The i5-7400’s only saving grace is its efficiency profile, but the database does not record power consumption in benchmark scores. What the data does show is that the i5-7400 has a 65 TDP rating versus the i9-9960X’s 165, and it uses a smaller L3 cache (6 MB shared versus 22 MB shared). For users who prioritize low heat output and modest power draw, the i5-7400 is the more restrained option, but in raw performance, it never wins a single recorded test.

Architecture Differences

The two processors are separated by more than just core count. The i5-7400 is built on the Kaby Lake architecture, which is a refinement of Intel’s 14 nm process node, while the i9-9960X uses the Skylake-X architecture, also on a 14 nm node but with a much larger die. The i9-9960X’s die measures 484 mm², a figure that reflects the massive number of cores and cache it packs onto the silicon. The i5-7400’s die size is not recorded in the database, but its 4-core layout is far less complex.

Core and thread counts are the most obvious divider. The i5-7400 offers 4 cores and 4 threads, meaning no hyper-threading, while the i9-9960X offers 16 cores and 32 threads, quadrupling the thread count. The cache hierarchy also differs significantly. Both share a 64 KB L1 cache per core, but the L2 cache jumps from 256 KB per core on the i5-7400 to 1 MB per core on the i9-9960X. The L3 cache scales from 6 MB shared on the i5-7400 to 22 MB shared on the i9-9960X, providing the larger chip with substantially more on-die storage for frequently accessed data.

Clock speeds tell a similar story. The i5-7400 has a base clock of 3.00 GHz and a boost clock of 3.50 GHz, while the i9-9960X has a base of 3.10 GHz and a boost of 4.50 GHz. The i9-9960X not only has more cores but also a higher top clock, which explains its single-core advantage despite the architectural similarity. The i9-9960X also has an unlocked multiplier, allowing overclocking, while the i5-7400’s multiplier is locked.

Memory support is another major divergence. The i5-7400 uses dual-channel DDR4 with a memory bandwidth of 38.4 GB/s, while the i9-9960X uses quad-channel DDR4 with a memory bandwidth of 85.3 GB/s. That bandwidth difference is critical for memory-hungry workloads like video editing and large dataset processing. The i5-7400 includes integrated graphics (HD 630), which the i9-9960X lacks entirely, so users of the larger chip must install a discrete GPU. PCIe lane allocation also differs: the i5-7400 provides 16 Gen 3 lanes, while the i9-9960X provides 44 Gen 3 lanes, enabling more expansion cards or multi-GPU setups.

Head-to-Head Benchmarks

The Cinebench R15 multi-core test shows the i9-9960X scoring 2532 against the i5-7400’s 469, an 81.5% lead. The single-core variant of R15 shows the i9-9960X at 357 versus 66, again an 81.5% difference. These are not close contests; the i9-9960X is over five times faster in multi-core and over five times faster in single-core in this older Cinebench version.

Moving to Cinebench R20, the pattern holds. The i9-9960X scores 10550 in multi-core versus the i5-7400’s 1956, and 1489 in single-core versus 275. The delta remains 81.5% in both cases. Cinebench R23 shows the same result: the i9-9960X scores 25120 multi-core and 3546 single-core, while the i5-7400 scores 4658 and 657, respectively. The consistency of the 81.5% delta across all three Cinebench versions suggests that the i9-9960X’s advantage is not workload-specific but rather a fundamental throughput advantage.

Geekbench results are slightly less lopsided. In multi-core, the i9-9960X scores 10512 versus the i5-7400’s 2740, a 73.9% lead. In single-core, the i9-9960X scores 1396 versus 1043, a 25.3% lead. The single-core gap is the smallest recorded between these two chips, indicating that the i9-9960X’s higher boost clock (4.50 GHz versus 3.50 GHz) and newer architecture give it a real but limited edge in lightly threaded tasks. Still, a 25.3% deficit is not something the i5-7400 can overcome in any real-world application.

The database also records PassMark scores for the i5-7400, which are not available for the i9-9960X. The i5-7400 achieves a single-thread score of 2074, an integer math score of 14293, and a floating point score of 12042. These numbers provide a baseline for the i5-7400’s absolute capability but do not change the head-to-head outcome, since the i9-9960X lacks comparable entries in those tests.

FAQ

Q: Which processor is faster in single-core tasks?

A: The Intel Core i9-9960X. It scores 1396 in Geekbench single-core versus 1043 for the i5-7400, a 25.3% advantage. In Cinebench R23 single-core, the i9-9960X scores 3546 versus 657, an 81.5% lead.

Q: How large is the multi-core performance gap?

A: The i9-9960X leads by 81.5% in all Cinebench multi-core tests and by 73.9% in Geekbench multi-core. For example, Cinebench R23 multi-core shows 25120 for the i9-9960X versus 4658 for the i5-7400.

Q: Does the i5-7400 have integrated graphics?

A: Yes, the i5-7400 includes HD 630 integrated graphics. The i9-9960X has no integrated graphics at all, so a discrete GPU is required for any display output.

Q: Can the i9-9960X be overclocked?

A: Yes, the i9-9960X has an unlocked multiplier. The i5-7400’s multiplier is locked, preventing overclocking.

Q: Which processor supports more memory bandwidth?

A: The i9-9960X supports quad-channel DDR4 with 85.3 GB/s bandwidth. The i5-7400 supports dual-channel DDR4 with 38.4 GB/s.

Q: Are both processors on the same manufacturing process?

A: Yes, both use Intel’s 14 nm process node. However, the i9-9960X has a much larger die at 484 mm², reflecting its 16-core design.

Specification Differences

| Specification | Intel Core i5-7400 | Intel Core i9-9960X |

|---|---|---|

| Cores | 4 | 16 |

| Threads | 4 | 32 |

| Base Clock | 3.00 GHz | 3.10 GHz |

| Boost Clock | 3.50 GHz | 4.50 GHz |

| TDP | 65 W | 165 W |

| Socket | Intel Socket 1151 | Intel Socket 2066 |

| Architecture | Kaby Lake | Skylake-X |

| Process Node | 14 nm | 14 nm |

| Die Size | Not recorded | 484 mm² |

| L2 Cache | 256 KB (per core) | 1 MB (per core) |

| L3 Cache | 6 MB (shared) | 22 MB (shared) |

| Memory Bus | Dual-channel | Quad-channel |

| Memory Bandwidth | 38.4 GB/s | 85.3 GB/s |

| PCIe Lanes | 16 (Gen 3) | 44 (Gen 3) |

| Integrated Graphics | HD 630 | None |

| Multiplier Unlocked | No | Yes |

| Production Status | Active | End-of-life |

| Part Number | SR32W | SREZ4 |

The Verdict

The data is unambiguous: the Intel Core i9-9960X is the superior processor in every recorded benchmark. It wins all eight head-to-head tests, with a minimum margin of 25.3% in Geekbench single-core and a maximum margin of 81.5% in all Cinebench workloads. Anyone selecting between these two for multi-threaded productivity, rendering, or heavy computation should choose the i9-9960X without hesitation. Its 16 cores, 32 threads, larger caches, and quad-channel memory provide a structural advantage that no i5-7400 configuration can overcome.

The i5-7400 remains a functional desktop processor for basic tasks, as its PassMark single-thread score of 2074 and integer math score of 14293 indicate. It has integrated graphics, a lower TDP of 65 W, and an active production status, making it a simple, low-power option for office work or light media consumption. However, its 4 threads and 38.4 GB/s memory bandwidth are severe limitations. The i9-9960X, despite being end-of-life and carrying a launch MSRP of $1684, is in a different performance class entirely. The verdict is straightforward: the i9-9960X for any performance-sensitive workload, the i5-7400 only where its integrated graphics or low power draw are the deciding factors.