Intel Core i5-10400H vs Intel Xeon D-1557 Comparison

Head-to-Head Benchmarks

The data is unambiguous: the Intel Xeon D-1557 wins every single benchmark in the head-to-head comparison. Across all six Cinebench tests, the Xeon D-1557 leads the Intel Core i5-10400H by a remarkably consistent margin of roughly 12.2% to 12.5%. This uniformity across both single-core and multi-core workloads suggests a fundamental performance advantage rather than a test-specific quirk.

In Cinebench R15 multi-core, the Xeon D-1557 scores 795 against the Core i5-10400H's 697, a delta of -12.3% from the perspective of the i5. The single-core R15 test tells a similar story: 112 for the Xeon D-1557 versus 98 for the Core i5-10400H, a 12.5% deficit. Moving to Cinebench R20, the multi-core scores are 3314 versus 2908 (12.3% gap), and single-core is 467 versus 410 (12.2% gap). The pattern persists in Cinebench R23 with a multi-core score of 7892 versus 6924 and a single-core score of 1114 versus 977, both showing a 12.3% difference.

The Core i5-10400H's best showing is in Geekbench, where it posts a multi-core score of 5000 and a single-core score of 1413. However, the Xeon D-1557 has no Geekbench results in the data, so no direct comparison is possible there. The average benchmark score for the Core i5-10400H is 2303, while the Xeon D-1557 sits at 2282—a difference of only 0.9%, which is within the noise of the rival comparison set. Both processors land at the 47th percentile among all CPUs, placing them in the same performance tier despite the Xeon's consistent head-to-head wins.

Looking at nearest rivals, the Core i5-10400H's closest competitor is the Intel Core i7-8809G at 2307 (a -0.2% delta), followed by the Intel Xeon E-2134 at 2319 (-0.7%) and the AMD Ryzen 7 2700 at 2320 (-0.7%). The Xeon D-1557's nearest rival is the Intel Xeon E5-2629 v3 at 2283 (0% delta), with the Intel Core i3-10305 at 2264 (0.8% delta) close behind. Notably, the two processors appear in each other's nearestRivals lists, with the Xeon D-1557 sitting at -0.9% relative to the Core i5-10400H's average score. This confirms that while the Xeon wins every direct benchmark, the aggregate performance picture is nearly identical.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core i5-10400H has a boost clock of 4.60 GHz, while the Intel Xeon D-1557 has a boost clock of 2.10 GHz. Despite the Core i5's higher boost frequency, the Xeon D-1557 still wins every single-core benchmark in the head-to-head data.

Q: How do the core and thread counts differ?

A: The Intel Core i5-10400H has 4 cores and 8 threads, whereas the Intel Xeon D-1557 has 12 cores and 24 threads. The Xeon's triple core count and six times the thread count contribute to its multi-core benchmark advantage.

Q: Do both processors support ECC memory?

A: No. The Intel Xeon D-1557 supports ECC memory, while the Intel Core i5-10400H does not. This is a key differentiator for server and workstation use cases.

Q: What are the market segments for these two chips?

A: The Intel Core i5-10400H is classified as a Mobile processor, while the Intel Xeon D-1557 is classified as a Server/Workstation processor. This explains the Xeon's ECC support and its different socket requirements (Intel BGA 1667 versus Intel BGA 1440).

Q: Which chip has a larger die size and transistor count?

A: The Intel Xeon D-1557 has 3,200 million transistors on a 246 mm² die. The Intel Core i5-10400H does not have transistor or die size data listed. Both are built on Intel's 14 nm process node.

Q: How old are these processors relative to each other?

A: The Intel Xeon D-1557 was released on 2016-02-23, while the Intel Core i5-10400H was released on 2020-04-01. The Xeon predates the Core i5 by roughly four years, yet it still outperforms it in every shared benchmark test.

Architecture Differences

The two processors come from different Intel architecture families. The Intel Core i5-10400H is built on Comet Lake, specifically the Comet Lake-H variant, while the Intel Xeon D-1557 is built on Broadwell, specifically the Broadwell-DE variant. Both use a 14 nm process node from Intel's own foundry, so the manufacturing technology is identical. The architectural split is significant: Comet Lake is a later-generation design targeting mobile performance, while Broadwell-DE is a server-focused architecture designed for dense, low-power deployments.

Cache organization differs notably. The Core i5-10400H has 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 6 MB of shared L3 cache. The Xeon D-1557 also has 64 KB of L1 and 256 KB of L2 per core, but its L3 cache is 1.5 MB per core rather than shared. With 12 cores, this gives the Xeon a total of 18 MB of L3 cache distributed across the cores, compared to the Core i5's 6 MB shared pool. This per-core L3 allocation is typical of server-oriented Xeon designs, which prioritize predictable cache access across many cores.

The Xeon D-1557's transistor count is listed at 3,200 million with a die size of 246 mm², while the Core i5-10400H has no transistor or die size data. The Xeon's PCIe implementation is "Gen 3, 24 Lanes (CPU only)", whereas the Core i5-10400H simply lists "Gen 3" without lane specifics. Neither processor has an unlocked multiplier, and the Core i5-10400H includes integrated UHD Graphics while the Xeon D-1557 has no integrated graphics listed. The Core i5 also lacks ECC memory support, which is a core feature of the Xeon's server pedigree.

Specification Differences

The specification sheet shows a clear divergence in core configuration. The Intel Core i5-10400H offers 4 cores and 8 threads, while the Intel Xeon D-1557 offers 12 cores and 24 threads—a 3x and 6x difference respectively. Base clocks differ dramatically: the Core i5-10400H runs at 2.60 GHz, while the Xeon D-1557 runs at a much lower 1500.00 MHz (1.50 GHz). Boost clocks also favor the Core i5 at 4.60 GHz versus the Xeon's 2.10 GHz. Both have a TDP of 45 watts, which is notable given the Xeon's far higher core count.

The socket interfaces are incompatible: Intel BGA 1440 for the Core i5-10400H and Intel BGA 1667 for the Xeon D-1557. Memory support is similar on the surface—both support DDR3 and DDR4 with dual-channel memory buses—but the Xeon D-1557 adds ECC memory capability, which the Core i5-10400H lacks. The Core i5-10400H has a listed memory bandwidth of 46.9 GB/s, while the Xeon D-1557 has no memory bandwidth figure. The Core i5-10400H includes integrated UHD Graphics, while the Xeon D-1557 lists no integrated graphics. The Xeon D-1557 has a launch MSRP of $694, while the Core i5-10400H has no launch MSRP listed. The production status for both is Active, and both have locked multipliers. The part numbers differ (SRH8R for the Core i5, SR2M4 for the Xeon), and the release dates are 2020-04-01 for the Core i5 and 2016-02-23 for the Xeon.

Where Each One Wins

The Intel Xeon D-1557 wins every benchmark where both processors have data. In Cinebench R15, R20, and R23, the Xeon leads by 12.2% to 12.5% across single-core and multi-core tests. This means the Xeon D-1557 is the choice for any workload where Cinebench performance is representative, including 3D rendering, video encoding, and other heavily threaded tasks. Its 12 cores and 24 threads provide substantially more parallel processing capability, and its per-core L3 cache layout supports multi-threaded scaling. The Xeon's ECC memory support and server/workstation market segment further reinforce its suitability for data integrity-sensitive applications like database servers, virtualization hosts, and scientific computing.

The Intel Core i5-10400H's strengths lie elsewhere. Its higher base clock of 2.60 GHz and boost clock of 4.60 GHz suggest strong single-thread responsiveness, and it includes integrated UHD Graphics, which the Xeon lacks entirely. The Core i5's mobile market segment and Intel BGA 1440 socket indicate it is designed for laptops and compact mobile workstations, where the Xeon's BGA 1667 socket and server orientation would not fit. The Core i5 also has a listed memory bandwidth of 46.9 GB/s, which is a concrete advantage on paper, though the Xeon has no comparable figure to measure against. For users who need integrated graphics, a mobile form factor, or a newer release date (2020 versus 2016), the Core i5-10400H is the only option between the two.

The Verdict

The data paints a one-sided picture: the Intel Xeon D-1557 outperforms the Intel Core i5-10400H in every single benchmark where both are tested. The consistent 12.3% margin across six Cinebench tests is decisive, and the Xeon's 12 cores and 24 threads versus the Core i5's 4 cores and 8 threads explain the multi-core advantage. Even in single-core tests, where the Core i5's higher boost clock might be expected to help, the Xeon D-1557 leads by 12.2% to 12.5%. This suggests the Xeon's architecture delivers better instructions-per-clock despite its much lower 1.50 GHz base and 2.10 GHz boost clocks.

However, the aggregate picture is closer than the head-to-head suggests. The average benchmark scores are 2303 for the Core i5-10400H and 2282 for the Xeon D-1557, a difference of under 1%. Both sit at the 47th percentile of all CPUs, and they appear in each other's nearestRivals lists with deltas under 1%. The Core i5-10400H also has Geekbench scores (5000 multi-core, 1413 single-core) that the Xeon D-1557 cannot match, as it has no Geekbench data.

The verdict depends on use case. For server or workstation deployments where ECC memory, 24 threads, and consistent multi-core throughput are paramount, the Intel Xeon D-1557 is the clear choice from the data. Its 12-core configuration and 1.5 MB per-core L3 cache are geared toward sustained parallel workloads. For mobile applications, integrated graphics, or situations where the newer Comet Lake platform is required, the Intel Core i5-10400H is the only viable option—it loses every direct benchmark but offers the flexibility of UHD Graphics and a mobile socket. The Xeon D-1557's launch MSRP is $694, but neither processor appears to offer a meaningful aggregate performance edge, so the decision should rest on platform requirements rather than raw benchmark scores.