AMD Ryzen 7 5800U vs Intel Xeon D-1587 Comparison

The AMD Ryzen 7 5800U and Intel Xeon D-1587 are two processors designed for entirely different worlds, yet their average benchmark scores land them within 0.6% of each other. This parity is deceptive, as their architectural philosophies and performance profiles diverge sharply across workloads. The Ryzen 7 5800U is a 15 W mobile part built on TSMC’s 7 nm process, while the Xeon D-1587 is a 65 W server chip on Intel’s 14 nm node. Their head-to-head results reveal a split decision: each wins two of the four shared benchmarks, but the margins and the nature of those wins tell a compelling story about what each silicon is optimized to do.

Where Each One Wins

The AMD Ryzen 7 5800U dominates in the Cinebench R15 tests, which appear to favor its higher boost clock and modern Zen 3 architecture. In Cinebench R15 multicore, the Ryzen scores 1613 against the Xeon’s 1167, a 38.2% advantage. The single-core R15 result is even more lopsided: 229 versus 164, a 39.6% lead for AMD. These are the largest deltas in the entire comparison, suggesting that the Ryzen’s 4.40 GHz boost clock is a decisive factor in workloads that do not scale perfectly with core count or that rely heavily on per-thread efficiency. The 5800U’s 8 cores and 16 threads are clearly capable of outpacing the Xeon’s 16 cores and 32 threads when the benchmark is less demanding on raw parallelism.

Conversely, the Intel Xeon D-1587 takes the Cinebench R23 results, which are more modern and likely stress sustained multicore throughput. In R23 multicore, the Xeon scores 11585 versus the Ryzen’s 8154, giving Intel a 29.6% win. The R23 single-core test also goes to Intel, though by a smaller 12.7% margin: 1635 versus 1427. This is surprising given the Ryzen’s clock advantage, but the data indicates the Xeon’s older Broadwell architecture still holds its own in this specific test. The Xeon’s wins are substantial in absolute terms, and the R23 multicore result is its strongest statement, likely reflecting the benefit of its 16 physical cores.

The benchmark distribution is not merely a tie in count; it is a tie in significance. The Ryzen wins by nearly 40% in R15, while the Xeon wins by nearly 30% in R23. This suggests the Ryzen excels in bursty, latency-sensitive tasks, while the Xeon pulls ahead in prolonged, heavily threaded workloads. The data implies that the R15 and R23 tests measure different aspects of performance, with the newer R23 likely being more representative of modern multi-threaded applications. The 5800U’s 54th percentile ranking among all CPUs matches the Xeon’s 54th percentile, underscoring their overall equivalence in aggregate, but the path to that parity is completely different.

The Verdict

From the data, the choice is clear based on workload profile. The AMD Ryzen 7 5800U is the pick for anyone prioritizing single-core responsiveness and efficiency in short-duration tasks. Its Cinebench R15 single-core score of 229 is 39.6% higher than the Xeon’s 164, and its R23 single-core score of 1427, while lower, still benefits from a 4.40 GHz boost clock that the Xeon cannot match with its 2.30 GHz. The 5800U is a mobile part with a 15 W TDP and integrated Radeon Vega 8 graphics, making it suitable for systems where space, power, and everyday application speed matter more than extreme parallel compute.

The Intel Xeon D-1587 is the choice for sustained, heavily threaded server workloads. Its R23 multicore score of 11585 is 29.6% ahead of the Ryzen, and its 16 cores and 32 threads provide a structural advantage that the Ryzen’s 8 cores cannot overcome in this test. The Xeon also supports ECC memory, a feature absent on the Ryzen, and offers 24 PCIe Gen 3 lanes compared to the Ryzen’s 8, making it more suited for server expansion. Its 65 W TDP and server/workstation market segment reinforce its role in always-on, compute-dense environments. The launch MSRP of the Xeon is 1549, which reflects its enterprise positioning, though pricing is not a factor in performance assessment.

For a general user, the Ryzen 7 5800U is the practical choice. For a data center or workstation operator running continuous multi-threaded jobs, the Xeon D-1587 is the data-backed winner. The tie in wins (2-2) is resolved by examining the magnitude and context of each victory. The Ryzen’s wins are in R15, which may be less indicative of modern workloads, while the Xeon’s R23 wins, particularly the multicore result, carry more weight for server applications. The data does not support a single “better” CPU; it supports two distinct tools for distinct jobs.

Head-to-Head Benchmarks

The most striking head-to-head result is in Cinebench R15 single-core, where the Ryzen 7 5800U scores 229 against the Xeon’s 164, a 39.6% delta. This is the largest percentage gap in the entire comparison. The Ryzen’s 4.40 GHz boost clock compared to the Xeon’s 2.30 GHz is the plausible driver, though the architecture also plays a role. The R15 multicore test shows a similar story: 1613 versus 1167, a 38.2% advantage for AMD. These two wins are decisive and demonstrate the Ryzen’s clear superiority in scenarios that are less dependent on core count.

The Intel Xeon D-1587 responds in the Cinebench R23 tests. The R23 multicore score of 11585 versus the Ryzen’s 8154 represents a 29.6% swing in favor of Intel. This is a massive absolute difference of 3431 points, the largest numerical gap in the data. The Xeon’s 16 cores and 32 threads are the obvious explanation, as R23 multicore is designed to scale with core count. The R23 single-core test is closer: 1635 versus 1427, a 12.7% win for Intel. This is notable because it contradicts the R15 single-core result, suggesting that the R23 test methodology or the Xeon’s Broadwell architecture handles this specific load better despite its lower clock speed.

The data shows a clear pattern: the Ryzen wins decisively in R15, while the Xeon wins decisively in R23. The deltas are not symmetrical—the Ryzen’s wins are proportionally larger in R15, while the Xeon’s R23 multicore win is larger in absolute points. This implies that the Ryzen’s advantage is in low-thread-count, high-clock scenarios, whereas the Xeon’s advantage is in high-thread-count scenarios. The average benchmark scores of 3369 for the Ryzen and 3350 for the Xeon (a 0.6% difference) mask these divergent performance profiles. A user running R15 would pick AMD; a user running R23 would pick Intel.

FAQ

Q: Which CPU has a higher single-core score in Cinebench R23?

A: The Intel Xeon D-1587 scores 1635 in Cinebench R23 single-core, which is 12.7% higher than the AMD Ryzen 7 5800U’s 1427.

Q: Does the Intel Xeon D-1587 support ECC memory?

A: Yes, the Xeon D-1587 supports ECC memory, while the AMD Ryzen 7 5800U does not, according to the specification data.

Q: What is the core and thread count difference between the two?

A: The AMD Ryzen 7 5800U has 8 cores and 16 threads, while the Intel Xeon D-1587 has 16 cores and 32 threads, doubling the Ryzen’s core count.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 7 5800U has a boost clock of 4.40 GHz, which is significantly higher than the Intel Xeon D-1587’s 2.30 GHz boost clock.

Q: How do their average benchmark scores compare?

A: The AMD Ryzen 7 5800U has an average benchmark score of 3369, while the Intel Xeon D-1587 has an average of 3350, a difference of 0.6% in favor of AMD.

Q: In which benchmark does the Intel Xeon D-1587 have its largest win?

A: The Xeon D-1587 wins Cinebench R23 multicore by 29.6%, scoring 11585 versus the Ryzen’s 8154, which is its largest percentage margin.

Architecture Differences

The AMD Ryzen 7 5800U is built on the Zen 3 architecture with the codename Cezanne-U, fabricated on a 7 nm process by TSMC. It contains 10,700 million transistors on a 180 mm² die. The Intel Xeon D-1587 uses the Broadwell architecture, codenamed Broadwell-DE, on Intel’s 14 nm process, with 3,200 million transistors on a 246 mm² die. The Ryzen’s smaller process node allows for higher clock speeds at lower power, evidenced by its 15 W TDP versus the Xeon’s 65 W TDP.

Cache layouts differ substantially. The Ryzen 7 5800U has 64 KB L1 per core, 512 KB L2 per core, and a shared 16 MB L3 cache. The Xeon D-1587 has 64 KB L1 per core, 256 KB L2 per core (half the Ryzen’s per-core L2), and 1.5 MB L3 per core, which totals more L3 but distributed per-core rather than shared. The Ryzen’s unified L3 is designed for lower latency access, while the Xeon’s per-core allocation suits its server role.

The Xeon supports both DDR3 and DDR4 memory, while the Ryzen supports only DDR4. The Xeon also has ECC memory support, a critical server feature, which the Ryzen lacks. PCIe connectivity is another major divergence: the Xeon offers Gen 3 with 24 lanes (CPU only), while the Ryzen provides Gen 3 with only 8 lanes. The Ryzen includes integrated Radeon Vega 8 graphics, whereas the Xeon has no integrated graphics. The Xeon’s socket is Intel BGA 1667, while the Ryzen uses AMD Socket FP6, both being BGA-style but incompatible.

Specification Differences

The two processors differ in nearly every core specification. Clock speeds: the Ryzen 7 5800U has a base clock of 1900.00 MHz and a boost of 4.40 GHz, while the Xeon D-1587 has a base of 1700.00 MHz and a boost of 2.30 GHz. TDP is a major split: 15 W for the Ryzen versus 65 W for the Xeon. Core counts are 8 versus 16, and threads are 16 versus 32. The L2 cache is 512 KB per core on the Ryzen versus 256 KB per core on the Xeon, while L3 is 16 MB shared versus 1.5 MB per core.

Memory bandwidth is listed as 51.2 GB/s for the Ryzen, with no figure provided for the Xeon. Memory support differs, with the Xeon accepting DDR3 and DDR4, while the Ryzen is DDR4-only. ECC memory is a feature only on the Xeon. PCIe lanes are 8 on the Ryzen versus 24 on the Xeon, both Gen 3. The process node is 7 nm for AMD versus 14 nm for Intel. The Ryzen has integrated Radeon Vega 8 graphics; the Xeon has none.

The release dates are far apart: the Ryzen launched on 2021-01-11, while the Xeon launched on 2016-02-23. Both are marked as Active in production status. The Ryzen’s part number is 100-000000285, while the Xeon’s is SR2M1. Neither has an unlocked multiplier. The Xeon has a launch MSRP of 1549, while the Ryzen has no listed launch MSRP. The Ryzen’s market segment is Mobile, while the Xeon is Server/Workstation.