Intel Core i5-10400F vs Intel Xeon 6315P Comparison

Where Each One Wins

The benchmark split between the Intel Xeon 6315P and the Intel Core i5-10400F is unusually clean, with each processor dominating a distinct category of work. The Core i5-10400F takes the majority of overall wins, 11 against 6, but the Xeon 6315P's victories are concentrated in areas that point to a different design philosophy.

The Xeon 6315P wins decisively in single-threaded throughput. Its Passmark single-thread score of 3795 is 49.4% ahead of the Core i5-10400F's 2541, which is the largest single-thread margin in the entire comparison. It also wins Passmark physics (1156 vs 696, a 66.1% advantage), floating-point math (33496 vs 25956, a 29% edge), data encryption (5470 vs 4100, a 33.4% lead), and prime number finding (150 vs 35, a 328.6% blowout). These are workloads where raw per-core capability matters more than thread count.

The Core i5-10400F wins the multi-threaded, throughput-oriented tests, but often by smaller margins. Cinebench R23 multicore shows 10283 vs 10134, only a 1.4% lead. The larger wins come in integer math (41471 vs 27046, a 34.8% advantage), random string sorting (23185 vs 14487, a 37.5% lead), and data compression (185944 vs 118313, a massive 36.4% margin). The Core i5 also edges out the Xeon in extended instructions (12500 vs 10539, a 15.7% lead) and Passmark multithread (12115 vs 11923, a 1.6% edge).

What is curious is the Prime95-style prime number test: the Xeon scores 150 to the Core i5's 35, a 328.6% difference that dwarfs every other delta. That result suggests the Xeon's architecture has a specific advantage in integer-heavy, branch-heavy scalar loops. Meanwhile, the Core i5's 6 cores and 12 threads give it a structural edge in embarrassingly parallel workloads like compression and integer math, where extra threads can be fed continuously.

In short, the Xeon 6315P is the pick for latency-sensitive, single-threaded, and floating-point-heavy tasks. The Core i5-10400F is the pick for throughput workloads that scale with core count and memory bandwidth. Neither processor is a general winner; each owns a clear domain.

Architecture Differences

The two processors come from different eras and different design intents. The Xeon 6315P is built on Raptor Lake-R, a 10 nm process, and is part of the Xeon 6 generation with the Raptor Lake Refresh codename. It is a 4-core, 4-thread part with no Hyper-Threading. The Core i5-10400F is Comet Lake on a 14 nm process, with 6 cores and 12 threads. The node difference alone explains a lot of the single-thread gap: the 10 nm part boosts to 4.70 GHz versus 4.30 GHz for the 14 nm part, and its base clock of 2.80 GHz is slightly lower than the Core i5's 2.90 GHz.

Cache layouts differ substantially. The Xeon has 80 KB of L1 per core and 1.25 MB of L2 per core, while the Core i5 has 64 KB of L1 per core and 256 KB of L2 per core. The L3 is identical in total size at 12 MB shared, but the per-core L2 advantage of the Xeon is significant: 1.25 MB versus 256 KB is a 4.9x difference per core. That likely feeds the Xeon's strong single-thread and floating-point results. The Core i5 compensates with more cores and threads, but each core has far less private cache.

Memory support also diverges. The Xeon supports both DDR4 and DDR5 in a dual-channel configuration, while the Core i5 is limited to DDR4. The database lists a memory bandwidth figure of 42.7 GB/s for the Core i5; no comparable figure is recorded for the Xeon. The Xeon also supports ECC memory, which the Core i5 does not. The Xeon uses PCIe Gen 5 with 16 CPU lanes; the Core i5 uses PCIe Gen 3 with 16 CPU lanes. The Xeon has no integrated graphics, and the Core i5's iGPU status is not recorded.

The socket difference matters for platform choices: the Xeon is on Intel Socket 1700, while the Core i5 is on Intel Socket 1200. The Xeon is classified as a Server/Workstation part, the Core i5 as Desktop. The Xeon has a TDP of 55 W versus 65 W for the Core i5, despite the Xeon having a higher boost clock. The Xeon was released in February 2025; the Core i5 in April 2020. The Xeon has a launch MSRP of $213; the Core i5 has no recorded launch MSRP.

Head-to-Head Benchmarks

The largest win for the Xeon is in Passmark's find prime numbers test, where it scores 150 versus 35 for the Core i5, a 328.6% advantage. This is the kind of result that suggests the Xeon's per-core pipeline and cache hierarchy are exceptionally well suited to scalar integer loops. The Core i5's 6-core, 12-thread design does not help here because the workload is inherently single-threaded per core.

The second-largest Xeon win is in Passmark physics, at 1156 vs 696, a 66.1% lead. Physics simulation tends to be latency-bound and cache-sensitive, which aligns with the Xeon's 1.25 MB per-core L2. Floating-point math follows with 33496 vs 25956, a 29% margin. Data encryption gives the Xeon a 33.4% win (5470 vs 4100), and single-thread Passmark gives it a 49.4% win (3795 vs 2541). Notably, the Xeon's single-thread score of 3795 is duplicated in both the "single_thread" and "singlethread" fields, confirming the result.

The Core i5's largest win is in data compression: 185944 vs 118313, a 36.4% lead. This workload scales with thread count and memory bandwidth, and the Core i5 has 12 threads to the Xeon's 4. Random string sorting follows with 23185 vs 14487, a 37.5% margin. Integer math gives the Core i5 a 34.8% edge (41471 vs 27046). Extended instructions show a 15.7% lead (12500 vs 10539). The Cinebench results are all close: R15 multicore is 1036 vs 1021 (1.4% Core i5), R20 multicore is 4318 vs 4256 (1.4%), R23 multicore is 10283 vs 10134 (1.4%), and the single-core variants are similarly narrow at 1.4% to 1.5%. Passmark multithread is 12115 vs 11923, a 1.6% Core i5 edge.

The pattern is striking: in Cinebench, the Core i5 wins every test but by margins under 2%, suggesting that the Xeon's high single-thread performance nearly compensates for its 4-core deficit. In Passmark's more varied workload suite, the margins swing wildly, with each processor winning by 30% or more in its favored categories.

FAQ

Q: Which processor has the higher single-thread performance?

A: The Xeon 6315P. Its Passmark single-thread score is 3795, which is 49.4% higher than the Core i5-10400F's 2541. It also has a higher boost clock at 4.70 GHz versus 4.30 GHz.

Q: Why does the Core i5-10400F win most benchmarks despite having a lower single-thread score?

A: The Core i5 has 6 cores and 12 threads versus the Xeon's 4 cores and 4 threads. This allows it to win in parallel workloads like data compression (185944 vs 118313, a 36.4% lead) and integer math (41471 vs 27046, a 34.8% lead). The Xeon's per-core strength cannot overcome the thread count disadvantage in these tests.

Q: Is the Xeon 6315P faster in every single-thread test?

A: No. In Cinebench R23 single-core, the Core i5 scores 1451 versus the Xeon's 1430, a 1.4% Core i5 lead. The same pattern appears in R15 and R20 single-core tests. The Xeon only wins the Passmark single-thread test, which uses a different measurement methodology.

Q: Which processor supports ECC memory?

A: The Xeon 6315P supports ECC memory, while the Core i5-10400F does not. The Xeon also supports both DDR4 and DDR5, whereas the Core i5 only supports DDR4.

Q: How do the cache sizes compare?

A: The Xeon has 80 KB of L1 and 1.25 MB of L2 per core, while the Core i5 has 64 KB of L1 and 256 KB of L2 per core. Both have 12 MB of shared L3.

Q: Which processor has a higher TDP?

A: The Core i5-10400F has a TDP of 65 W, while the Xeon 6315P has a TDP of 55 W. The Xeon achieves its higher boost clock within a lower power envelope.

Specification Differences

| Specification | Intel Xeon 6315P | Intel Core i5-10400F |

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

| Cores | 4 | 6 |

| Threads | 4 | 12 |

| Base clock | 2.80 GHz | 2.90 GHz |

| Boost clock | 4.70 GHz | 4.30 GHz |

| TDP | 55 W | 65 W |

| Process node | 10 nm | 14 nm |

| L1 cache | 80 KB (per core) | 64 KB (per core) |

| L2 cache | 1.25 MB (per core) | 256 KB (per core) |

| L3 cache | 12 MB (shared) | 12 MB (shared) |

| Memory support | DDR4, DDR5 | DDR4 |

| Memory bandwidth | Not recorded | 42.7 GB/s |

| ECC memory | Yes | No |

| PCIe | Gen 5, 16 lanes (CPU only) | Gen 3, 16 lanes (CPU only) |

| Socket | Intel Socket 1700 | Intel Socket 1200 |

| Integrated graphics | N/A | Not recorded |

| Market segment | Server/Workstation | Desktop |

| Release date | 2025-02-23 | 2020-04-29 |

| Launch MSRP | $213 | Not recorded |

| Part number | SRPLX | SRH3DSRH79 |

The Verdict

The data paints a clear picture: choose the Intel Xeon 6315P if your workload is dominated by single-threaded execution, floating-point math, encryption, or physics simulation. Its Passmark single-thread score of 3795 is 49.4% ahead of the Core i5-10400F, and its per-core L2 cache of 1.25 MB is 4.9x larger. The Xeon also brings platform features the Core i5 lacks: ECC memory support, DDR5 compatibility, PCIe Gen 5, and a lower 55 W TDP. Its 6 benchmark wins all come in areas where per-core capability is the bottleneck.

Choose the Intel Core i5-10400F if your workloads scale with threads. Its 6 cores and 12 threads deliver a 36.4% lead in data compression, a 37.5% lead in random string sorting, and a 34.8% lead in integer math. In Cinebench, it wins every test, though by margins under 2%, indicating that the Xeon's single-thread advantage nearly closes the gap. The Core i5 also holds a 68th percentile ranking versus the Xeon's 69th, meaning the two are essentially peers in overall CPU population standing.

The prime number test result is the most telling outlier: the Xeon's 150 vs 35 is a 328.6% margin that no other benchmark approaches. That single data point suggests the Xeon's architecture has a specialized strength in scalar integer loops that the Core i5 cannot match. Conversely, the Core i5's 185944 score in data compression shows how far thread scaling can go when the workload is parallel-friendly. Average benchmark scores are close (14574 for the Xeon, 14185 for the Core i5, a 2.7% gap), but the underlying distributions could not be more different. The Xeon is a specialized single-thread performer; the Core i5 is a general-purpose throughput workhorse.