Intel Core i5-8500B vs Intel Xeon D-1540 Comparison

The Intel Xeon D-1540 and Intel Core i5-8500B represent two distinct philosophies: a low-power, server-oriented system-on-a-chip versus a higher-clocked, desktop-derived processor. Despite both being 14nm Intel parts, benchmark results show the Xeon D-1540 taking a clean sweep in all six head-to-head Cinebench comparisons, though the underlying architecture and feature sets tell a more nuanced story than the raw scores alone.

FAQ

Q: Which processor wins in multi-core Cinebench R23?

A: The Intel Xeon D-1540 wins decisively, scoring 8531 versus the Core i5-8500B’s 7480, a 14.1% advantage. This pattern holds across every multi-core test, from Cinebench R15 (859 vs 753) to R20 (3583 vs 3141).

Q: Is the single-core performance gap similar to the multi-core gap?

A: Yes, the Xeon D-1540 leads by 14% in Cinebench R23 single-core (1204 vs 1056) and by 14.2% in R15 single-core (121 vs 106). This consistency is notable because the Core i5-8500B has a much higher boost clock of 4.10 GHz compared to the Xeon’s 2.60 GHz.

Q: Do the two CPUs have the same number of cores?

A: No. The Xeon D-1540 has 8 cores and 16 threads, while the Core i5-8500B has 6 cores and 6 threads. The Xeon’s hyper-threading support doubles its thread count, while the Core i5 lacks this feature.

Q: What memory features differentiate these two processors?

A: The Xeon D-1540 supports both DDR3 and DDR4 memory with ECC capability, while the Core i5-8500B supports only DDR4 without ECC. The Core i5-8500B also lists a memory bandwidth of 42.7 GB/s, whereas the Xeon D-1540 does not specify a bandwidth figure.

Q: How do their average benchmark scores compare?

A: The Xeon D-1540 has an average benchmark score of 2467, placing it 0.5% ahead of the Intel Core i5-8600. The Core i5-8500B averages 2423, which is 0.1% behind the AMD Ryzen 5 4680U. Both CPUs sit at the 48th percentile of all CPUs.

Q: Which processor has integrated graphics?

A: Only the Core i5-8500B has integrated graphics, specifically the UHD Graphics 630. The Xeon D-1540 has no integrated graphics unit listed.

Architecture Differences

The two processors belong to different Intel microarchitectures separated by several years of design evolution. The Xeon D-1540 is based on Broadwell, specifically the Broadwell-DE generation, while the Core i5-8500B uses the Coffee Lake architecture. Both are manufactured on Intel’s 14nm process node, but the similarities largely end there.

The Xeon D-1540 is a server/workstation part with 8 cores and 16 threads, built for multi-threaded workloads and sustained operation. Its base clock is 2000.00 MHz with a boost clock of 2.60 GHz, figures that prioritize power efficiency over raw speed. The die size is 246 mm² and contains 3,200 million transistors. Memory support includes both DDR3 and DDR4 in dual-channel configuration, with ECC memory support being a critical feature for reliability-sensitive applications. The processor uses the Intel BGA 1667 socket and remains in active production.

The Core i5-8500B, by contrast, is a desktop processor repackaged for embedded or mobile use, now marked as end-of-life. It has 6 cores and 6 threads, with no hyper-threading. Its base clock of 3.00 GHz and boost clock of 4.10 GHz are substantially higher than the Xeon’s, reflecting a design focused on single-threaded responsiveness. The die size is smaller at 154 mm², and the transistor count is not listed. It uses the Intel BGA 1440 socket and supports only DDR4 memory in dual-channel configuration, with no ECC option. The integrated UHD Graphics 630 is present, making it a complete system on a single package.

L3 cache organization differs significantly. The Xeon D-1540 allocates 1.5 MB of L3 cache per core, which for 8 cores implies a larger total pool. The Core i5-8500B uses a shared 9 MB L3 cache across all 6 cores. L1 and L2 caches are identical per core: 64 KB and 256 KB respectively. PCIe lane counts also diverge: the Xeon provides 24 Gen 3 lanes from the CPU, while the Core i5 provides 16 Gen 3 lanes.

Head-to-Head Benchmarks

The head-to-head data presents a uniform picture: the Xeon D-1540 wins all six Cinebench comparisons, with delta percentages tightly clustered between 14.0% and 14.2%. This consistency across different Cinebench versions (R15, R20, R23) and across both single-core and multi-core tests suggests a fundamental performance advantage rather than a workload-specific anomaly.

Starting with multi-core results, the Xeon D-1540 scores 859 in Cinebench R15 versus the Core i5-8500B’s 753, a 14.1% lead. In R20, the gap remains at 14.1%, with scores of 3583 and 3141 respectively. The R23 multi-core test shows the same 14.1% delta: 8531 for the Xeon versus 7480 for the Core i5. The additional 2 cores and 10 extra threads clearly provide a decisive advantage in heavily threaded rendering workloads.

Single-core results are more surprising given the clock speed disparity. The Xeon D-1540’s 2.60 GHz boost clock is far lower than the Core i5-8500B’s 4.10 GHz, yet the Xeon still wins by 14.2% in R15 single-core (121 vs 106) and by 14.0% in both R20 (505 vs 443) and R23 (1204 vs 1056). This indicates that the Broadwell architecture’s per-clock efficiency, combined with the larger L3 cache allocation per core, overcomes the Core i5’s raw frequency advantage.

The Core i5-8500B does have additional Geekbench scores not present for the Xeon: 4998 multi-core and 1407 single-core. However, without a direct Xeon D-1540 comparison on that test, these figures serve only as standalone reference points. The average benchmark scores tell a similar story to the Cinebench results: the Xeon D-1540 averages 2467, while the Core i5-8500B averages 2423, a difference of roughly 1.8%.

The Verdict

The data points to a clear recommendation for multi-threaded and server-style workloads: the Xeon D-1540 is the superior choice. Its 8-core, 16-thread configuration delivers 14.1% higher multi-core performance in Cinebench R23 compared to the 6-core, 6-thread Core i5-8500B. The Xeon also offers ECC memory support, which is essential for data integrity in server environments, and supports DDR3 as well as DDR4 for greater memory flexibility. Its active production status means ongoing availability, whereas the Core i5-8500B is end-of-life.

The Core i5-8500B’s case rests on different strengths. It has integrated UHD Graphics 630, eliminating the need for a discrete GPU in basic display scenarios. Its higher clocks, while not translating to a win in the Cinebench suite, may benefit workloads not represented in these specific benchmarks. The 42.7 GB/s memory bandwidth figure, while not directly comparable to the Xeon’s unspecified bandwidth, suggests a capable memory subsystem. For desktop or embedded applications requiring graphics output and where ECC is unnecessary, the Core i5-8500B remains a viable, lower-power option with a 45W TDP advantage over the Xeon’s 65W.

Neither processor wins on raw efficiency: the Xeon D-1540 achieves its performance with a 45W TDP, while the Core i5-8500B consumes 65W yet still loses every benchmark. The Xeon’s production status and ECC support make it the safer long-term investment for reliability-focused systems. The Core i5-8500B’s edge is purely in platform simplicity and integrated graphics.

Specification Differences

| Specification | Intel Xeon D-1540 | Intel Core i5-8500B |

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

| Cores / Threads | 8 / 16 | 6 / 6 |

| Base Clock | 2000.00 MHz | 3.00 GHz |

| Boost Clock | 2.60 GHz | 4.10 GHz |

| TDP | 45 W | 65 W |

| Socket | Intel BGA 1667 | Intel BGA 1440 |

| Architecture | Broadwell | Coffee Lake |

| Generation | Xeon D (Broadwell-DE) | Core i5 (Coffee Lake) |

| Process Node | 14 nm | 14 nm |

| Transistors | 3,200 million | Not listed |

| Die Size | 246 mm² | 154 mm² |

| L3 Cache | 1.5 MB (per core) | 9 MB (shared) |

| Memory Support | DDR3, DDR4 | DDR4 |

| Memory Bandwidth | Not listed | 42.7 GB/s |

| ECC Memory | Yes | No |

| PCIe Lanes | Gen 3, 24 Lanes | Gen 3, 16 Lanes |

| Integrated Graphics | None | UHD Graphics 630 |

| Market Segment | Server/Workstation | Desktop |

| Production Status | Active | End-of-life |

| Release Date | 2015-03-08 | 2018-04-02 |

| Launch MSRP | $581 | $192 |

| Part Number | SR29A | SRCX3 |