Intel Core i5-10400 vs Intel Xeon 6315P Comparison

Head-to-Head Benchmarks

The benchmark data presents a clear split: the Intel Xeon 6315P wins 12 of the 17 recorded comparisons, while the Intel Core i5-10400 takes 5. The margins, however, tell a more nuanced story than the raw win count.

In Cinebench testing, the Xeon 6315P is decisively ahead across every version. In R15 multicore, it scores 1021 against 838 for the i5-10400, a 21.8% advantage. The R20 multicore result shows 4256 versus 3492, a 21.9% gap, and R23 multicore follows the same pattern with 10134 against 8316, again 21.9% ahead. Single-core Cinebench results are nearly identical in percentage terms: R15 single-core shows 144 versus 118 (22% ahead), R20 single-core shows 600 versus 493 (21.7% ahead), and R23 single-core shows 1430 versus 1174 (21.8% ahead). The consistency across all six Cinebench sub-tests, with deltas clustered between 21.7% and 22%, indicates a uniform per-thread performance advantage rather than a workload-specific quirk.

The Passmark suite reveals a more complex picture. The Xeon 6315P dominates in several specialized tests. The most striking result is in prime number finding, where the Xeon scores 150 versus 34 for the i5-10400, a massive 341.2% advantage. Physics simulation also favors the Xeon heavily: 1156 versus 669, a 72.8% gap. Floating point math shows the Xeon ahead at 33496 versus 26080, a 28.4% margin. Data encryption goes to the Xeon at 5470 versus 4078, a 34.1% advantage. Single-threaded Passmark results are also strongly in the Xeon's favor: 3795 versus 2560, a 48.2% lead, a figure that appears in both the passmark_single_thread and passmark_singlethread records.

The i5-10400's wins are concentrated in integer-heavy and data-manipulation tasks. Data compression is its largest victory: 187207 versus 118313, a 36.8% margin. Integer math shows 41715 versus 27046, a 35.2% lead. Random string sorting goes to the i5 at 23206 versus 14487, a 37.6% gap. Extended instructions favor the i5 at 12501 versus 10539, a 15.7% margin. The multithread Passmark test is nearly a tie, with the i5 edging out 12006 versus 11923, a slim 0.7% difference.

Where Each One Wins

The data indicates the Xeon 6315P is the stronger choice for workloads that depend on per-thread throughput and certain math-heavy operations. Its Cinebench sweep across all three versions, both single and multi-core, points to superior instruction-level efficiency in rendering-style workloads. The 48.2% single-thread Passmark lead reinforces this: any application that cannot fully utilize many cores will see a substantial benefit from the Xeon. The 341.2% prime number advantage and 72.8% physics lead suggest particular strength in algorithmic number crunching and simulation-style physics calculations. Data encryption at 34.1% ahead also positions the Xeon well for security-related workloads. The 12 wins in the comparison set, including all six Cinebench tests and several Passmark sub-tests, make it the overall benchmark leader.

The i5-10400 wins where raw core count and thread count convert into throughput on parallel, data-dense tasks. Its 6 cores and 12 threads, versus the Xeon's 4 cores and 4 threads, drive the 36.8% data compression lead and the 35.2% integer math advantage. Random string sorting, a task that scales with memory bandwidth and parallel execution, shows a 37.6% edge. Extended instructions at 15.7% ahead indicates better SIMD or specialized instruction throughput in certain code paths. The near-tie in Passmark multithread, at 0.7% in favor of the i5, shows that despite the Xeon's per-thread superiority, the i5's additional threads nearly close the gap in mixed parallel work.

The overall average benchmark scores reflect this split: the Xeon 6315P averages 14574 points, while the i5-10400 averages 14037 points. The Xeon sits at the 69th percentile among all CPUs, the i5 at the 68th percentile, a narrow overall difference that hides the large per-test swings.

FAQ

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

A: The Intel Xeon 6315P. In Passmark single-thread testing it scores 3795 versus 2560 for the i5-10400, a 48.2% advantage. Cinebench R23 single-core confirms this with 1430 versus 1174, a 21.8% lead.

Q: Does the i5-10400 ever beat the Xeon 6315P?

A: Yes, in five recorded tests: data compression (187207 versus 118313, 36.8% ahead), integer math (41715 versus 27046, 35.2% ahead), random string sorting (23206 versus 14487, 37.6% ahead), extended instructions (12501 versus 10539, 15.7% ahead), and Passmark multithread (12006 versus 11923, 0.7% ahead).

Q: How large is the Xeon's lead in Cinebench R23 multicore?

A: The Xeon 6315P scores 10134, while the i5-10400 scores 8316, putting the Xeon 21.9% ahead. This matches the delta seen in R15 and R20 multicore tests, which show 21.8% and 21.9% leads respectively.

Q: Which CPU has better memory bandwidth support?

A: The i5-10400 has a recorded memory bandwidth rating of 42.7 GB/s. The database does not list a memory bandwidth figure for the Xeon 6315P, so no direct numerical comparison is available. The Xeon supports both DDR4 and DDR5 memory, while the i5 supports DDR4 only.

Q: What is the biggest single-test margin in the comparison?

A: The Passmark find prime numbers test. The Xeon 6315P scores 150 versus 34 for the i5-10400, a 341.2% difference, the largest delta in either direction across all 17 head-to-head benchmarks.

Q: How do the two CPUs compare in overall benchmark averages?

A: The Xeon 6315P has an average benchmark score of 14574, which is 537 points higher than the i5-10400's 14037. The Xeon ranks at the 69th percentile among all CPUs, the i5 at the 68th percentile.

Specification Differences

The two processors differ in nearly every core specification. The Xeon 6315P has 4 cores and 4 threads, while the i5-10400 has 6 cores and 12 threads. Base clocks are close: 2.80 GHz for the Xeon versus 2.90 GHz for the i5. Boost clocks favor the Xeon at 4.70 GHz versus 4.30 GHz. Thermal design power differs by 10 watts, with the Xeon rated at 55W and the i5 at 65W.

The sockets are not interchangeable. The Xeon uses Intel Socket 1700, while the i5 uses Intel Socket 1200. The Xeon's launch MSRP is $213. The i5 has no recorded launch MSRP in the database. Neither processor has an unlocked multiplier.

Memory support differs in scope. The Xeon supports DDR4 and DDR5 across a dual-channel bus, while the i5 supports only DDR4, also dual-channel. The i5 has a recorded memory bandwidth of 42.7 GB/s; no bandwidth figure is listed for the Xeon. ECC memory is supported by the Xeon but not by the i5.

PCIe generations differ. The Xeon provides Gen 5 with 16 CPU lanes, while the i5 provides Gen 3 with 16 CPU lanes. Integrated graphics also separate them: the Xeon has no integrated graphics, while the i5 includes UHD Graphics 630.

Architecture Differences

The Xeon 6315P is built on Raptor Lake architecture, specifically the Raptor Lake-R codename, and belongs to the Xeon 6 generation (Raptor Lake Refresh). It is manufactured on Intel's 10 nm process with a die size of 163 mm². The i5-10400 uses Comet Lake architecture with the Comet Lake codename, part of the Core i5 generation, built on Intel's 14 nm process. No die size is recorded for the i5.

Cache hierarchies differ in per-core allocation. The Xeon has 80 KB of L1 cache per core, 1.25 MB of L2 per core, and 12 MB of shared L3. The i5 has 64 KB of L1 per core, 256 KB of L2 per core, and 12 MB of shared L3. Both share the same total L3 capacity, but the Xeon's larger per-core L2 may contribute to its single-threaded performance lead.

The Xeon targets the server and workstation market segment, while the i5 is a desktop part. Release dates are far apart: the Xeon's recorded release date is February 23, 2025, while the i5's is April 29, 2020. The Xeon's part number is SRPLX, while the i5 lists two part numbers: SRH3C and SRH78.

The Verdict

The data points to the Intel Xeon 6315P for users whose workloads emphasize single-thread performance, rendering, physics simulation, encryption, or prime-heavy mathematical computation. Its consistent 21.7% to 22% lead across all Cinebench tests, its 48.2% single-thread Passmark advantage, and its 341.2% prime number result make it the clear choice for these tasks. The 55W TDP also indicates lower power draw than the i5's 65W rating, and the inclusion of ECC memory support plus DDR5 compatibility positions it for server or workstation environments.

The Intel Core i5-10400 remains the better option for data compression, integer math, string sorting, and extended instruction workloads. Its 6-core, 12-thread configuration delivers a 36.8% compression lead, a 35.2% integer math lead, and a 37.6% string sorting advantage over the Xeon. The near-tie in Passmark multithread, at 0.7% apart, shows that in mixed parallel tasks the i5 holds its own despite the Xeon's per-thread superiority. The i5 also includes integrated graphics, which the Xeon lacks entirely.

The average benchmark scores, 14574 for the Xeon versus 14037 for the i5, suggest the Xeon holds a slight overall edge. The 69th versus 68th percentile ranking reinforces this as a narrow margin. The choice ultimately depends on workload type: the Xeon 6315P for single-thread-centric or math-heavy server workloads, the i5-10400 for parallel data-processing tasks that leverage its additional threads. The 12-to-5 win count favors the Xeon, but the i5's wins are substantial in their respective domains.