Intel Core i5-7400 vs Intel Xeon Platinum 8260 Comparison

Head-to-Head Benchmarks

The benchmark data presents a one-sided comparison. The Intel Xeon Platinum 8260 wins all six recorded head-to-head tests, with the Core i5-7400 trailing by a consistent margin of roughly 80.7% across every workload. This uniformity is striking: whether the test is single-threaded or multi-threaded, the delta remains nearly identical, suggesting the performance gap stems from fundamental architectural differences rather than workload-specific scaling.

In Cinebench R15 multi-core, the Xeon Platinum 8260 scores 2436 against the i5-7400's 469, a deficit of 80.7%. The single-core R15 test tells the same story: 343 versus 66, an 80.8% gap. Moving to Cinebench R20, the Xeon reaches 10152 in multi-core while the i5-7400 manages 1956, again 80.7% behind. The R20 single-core result shows 1433 against 275, an 80.8% difference.

Cinebench R23 confirms the pattern. The Xeon Platinum 8260 posts 24173 in multi-core, while the i5-7400 delivers 4658, an 80.7% deficit. Single-core R23 shows 3412 versus 657, also 80.7% behind. The consistency of these percentages across test generations and thread counts indicates the performance ratio is stable, not workload-dependent.

The Core i5-7400 does not win a single recorded head-to-head benchmark. Its average benchmark score of 7469, however, exceeds the Xeon Platinum 8260's 6992. This apparent contradiction is explained by the benchmark sets: the i5-7400 has additional PassMark tests (data compression, encryption, integer math, floating point math, physics, and others) that skew its average upward, while the Xeon Platinum 8260 only has Cinebench entries in this database. The percentile rankings, though, are identical: both sit at the 63rd percentile among all CPUs.

Architecture Differences

The architectural gap between these two processors is substantial. The Core i5-7400 is a Kaby Lake desktop part built on Intel's 14 nm process, while the Xeon Platinum 8260 is a Cascade Lake-SP server processor, also on 14 nm but with a vastly different core configuration.

Core counts differ by a factor of six: the i5-7400 has 4 cores and 4 threads, while the Xeon Platinum 8260 has 24 cores and 48 threads. This 6x core advantage and 12x thread advantage directly explains the multi-core benchmark dominance. The Xeon's 48 threads allow it to process far more parallel work, which Cinebench's multi-core tests heavily reward.

Clock speeds tell a more nuanced story. The i5-7400 has a 3.00 GHz base clock and 3.50 GHz boost clock. The Xeon Platinum 8260 has a lower 2.40 GHz base clock but a higher 3.90 GHz boost clock. Despite the lower base frequency, the Xeon still wins single-core tests by 80.8%, indicating its per-core performance at boost exceeds the i5-7400's maximum.

Cache hierarchies diverge significantly. Both use 64 KB of L1 cache per core, but L2 differs: the i5-7400 has 256 KB per core, while the Xeon Platinum 8260 has 1 MB per core. L3 cache is even more dramatic: the i5-7400 has 6 MB shared, while the Xeon has 35.75 MB shared. The Xeon's larger per-core L2 and massive L3 cache provide better data locality for demanding workloads.

Memory support also separates these parts. The i5-7400 uses dual-channel DDR4 with 38.4 GB/s bandwidth and no ECC support. The Xeon Platinum 8260 supports DDR4 with ECC memory enabled, though the database does not record its memory bus width or bandwidth. ECC support is a critical differentiator for server reliability requirements.

The i5-7400 includes integrated HD 630 graphics, while the Xeon Platinum 8260 has no integrated graphics. The i5-7400 also exposes PCIe Gen 3 with 16 lanes from the CPU, while the Xeon's PCIe configuration is not recorded. The i5-7400 uses Intel Socket 1151, the Xeon uses Intel Socket 3647, making them physically incompatible.

The Xeon Platinum 8260 contains 8,000 million transistors, a figure not recorded for the i5-7400. The Xeon's generation is listed as Xeon Platinum (Cascade Lake-SP), while the i5-7400 is Core i5 (Kaby Lake). Release dates differ by nearly two years: the i5-7400 launched in January 2017, the Xeon in December 2018. Both are locked multipliers, and neither has an unlocked overclocking path.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Xeon Platinum 8260 is significantly faster. In Cinebench R23 multi-core, it scores 24173 versus the i5-7400's 4658, an 80.7% advantage. The same margin appears in R15 (2436 versus 469) and R20 (10152 versus 1956).

Q: Does the Core i5-7400 win any benchmark?

A: No. The database records six head-to-head tests, and the Xeon Platinum 8260 wins all six. The i5-7400 does not have a single victory in the recorded benchmark set.

Q: Why does the i5-7400 have a higher average benchmark score than the Xeon?

A: The i5-7400's average is 7469, while the Xeon's is 6992. This is due to different benchmark sets: the i5-7400 includes many PassMark tests (data compression, integer math, floating point math, physics, and more), while the Xeon only has Cinebench entries. Both CPUs sit at the 63rd percentile overall.

Q: What is the core and thread difference?

A: The i5-7400 has 4 cores and 4 threads. The Xeon Platinum 8260 has 24 cores and 48 threads. This 6x core and 12x thread advantage underpins the Xeon's multi-core dominance.

Q: How do the cache sizes compare?

A: Both have 64 KB L1 per core. L2 differs: 256 KB per core on the i5-7400 versus 1 MB per core on the Xeon. L3 is 6 MB shared on the i5-7400 versus 35.75 MB shared on the Xeon.

Q: Do both processors support ECC memory?

A: No. The i5-7400 does not support ECC memory. The Xeon Platinum 8260 does support ECC memory, which is essential for error-correcting server workloads.

The Verdict

The data directs a clear choice based on workload type. For multi-threaded server or workstation tasks, the Xeon Platinum 8260 is overwhelmingly superior. Its 24 cores and 48 threads deliver roughly 80.7% higher performance in every Cinebench test, both single-core and multi-core. The Xeon's ECC memory support and massive 35.75 MB L3 cache make it suitable for reliability-critical enterprise environments.

The Core i5-7400 is not competitive in any recorded benchmark against the Xeon. However, its profile suits a different use case entirely. As a desktop part with integrated HD 630 graphics and dual-channel memory, it targets mainstream consumer builds where the Xeon's server features are unnecessary. Its 65 W TDP versus the Xeon's 165 W TDP suggests lower power draw, though the database does not record power consumption directly.

The percentiles complicate a simple verdict. Both CPUs sit at the 63rd percentile among all processors, and their average benchmark scores are close (7469 versus 6992), but these figures mix different test suites. Within the shared Cinebench tests, the Xeon is uniformly 80.7% faster. The i5-7400's higher average comes solely from its additional PassMark results, not from any head-to-head superiority.

For users running heavily threaded workloads, rendering, scientific computing, or server applications, the Xeon Platinum 8260 is the only reasonable choice from this data. For basic desktop use, the i5-7400 provides integrated graphics and a lower TDP, but its performance is categorically lower. The benchmark record offers no scenario where the i5-7400 outperforms the Xeon.

Specification Differences

| Specification | Intel Core i5-7400 | Intel Xeon Platinum 8260 |

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

| Cores | 4 | 24 |

| Threads | 4 | 48 |

| Base Clock | 3.00 GHz | 2.40 GHz |

| Boost Clock | 3.50 GHz | 3.90 GHz |

| TDP | 65 W | 165 W |

| Socket | Intel Socket 1151 | Intel Socket 3647 |

| Architecture | Kaby Lake | Cascade Lake |

| Codename | Kaby Lake | Cascade Lake-SP |

| Generation | Core i5 (Kaby Lake) | Xeon Platinum (Cascade Lake-SP) |

| Transistors | Not recorded | 8,000 million |

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

| L3 Cache | 6 MB (shared) | 35.75 MB (shared) |

| Memory Bus | Dual-channel | Not recorded |

| Memory Bandwidth | 38.4 GB/s | Not recorded |

| ECC Memory | No | Yes |

| PCIe | Gen 3, 16 Lanes (CPU only) | Not recorded |

| Integrated Graphics | HD 630 | None |

| Market Segment | Desktop | Server/Workstation |

| Production Status | Active | Not recorded |

| Release Date | January 2017 | December 2018 |

| Part Number | SR32W | SRF9HCD8069504201101 |

Both processors share the Intel 14 nm process node, DDR4 memory support, and locked multipliers. The Xeon's transistor count of 8,000 million dwarfs the i5-7400's unrecorded figure, reflecting its larger core complex. The Xeon also carries a higher boost clock (3.90 GHz versus 3.50 GHz), which contributes to its single-core wins despite the lower base frequency.