Intel Xeon D-1541 vs Intel Xeon E5-2643 v3 Comparison

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Xeon E5-2643 v3 records an average benchmark score of 2511, while the Intel Xeon D-1541 records 2447. The E5-2643 v3 also sits at the 49th percentile of all CPUs, one point above the D-1541's 48th percentile.

Q: How do the two chips compare in single-threaded performance?

A: The E5-2643 v3 wins every single-core test in the head-to-head comparisons. In Cinebench R15 single-core, it scores 123 against the D-1541's 120, a 2.5% advantage. In Cinebench R20 single-core, it scores 514 versus 501, and in R23 single-core it scores 1225 versus 1194, both representing a 2.6% lead.

Q: What is the core and thread configuration of each processor?

A: The E5-2643 v3 has 6 cores and 12 threads, while the D-1541 has 8 cores and 16 threads. Despite having fewer cores, the E5-2643 v3 still wins all multi-core benchmarks in the comparison.

Q: What memory configurations do the two processors support?

A: The E5-2643 v3 supports DDR4 memory over a quad-channel bus with a memory bandwidth of 68.3 GB/s. The D-1541 supports both DDR3 and DDR4 memory over a dual-channel bus, and its memory bandwidth is not recorded in the database.

Q: Are both processors locked or unlocked?

A: Both the Intel Xeon E5-2643 v3 and the Intel Xeon D-1541 have a locked multiplier, so neither supports unlocked overclocking.

Q: What is the production status of each processor?

A: The E5-2643 v3 is listed as end-of-life, while the D-1541 is listed as active production. The E5-2643 v3 was released in September 2014, and the D-1541 was released in October 2015.

Where Each One Wins

The Intel Xeon E5-2643 v3 wins every benchmark in the head-to-head set, taking all six tests. Its largest margin is 2.7% in Cinebench R15 multi-core, where it scores 875 against the D-1541's 852. The remaining multi-core tests show a 2.6% lead in both Cinebench R20 (3646 versus 3554) and Cinebench R23 (8682 versus 8463). On the single-core side, the E5-2643 v3 leads by 2.5% in Cinebench R15 (123 versus 120) and by 2.6% in both Cinebench R20 (514 versus 501) and Cinebench R23 (1225 versus 1194).

The Intel Xeon D-1541 does not win any of the six head-to-head benchmarks. Its closest result is the Cinebench R15 multi-core test, where it trails by just 2.7%. The D-1541's advantage lies outside raw CPU throughput: it is an active production part with a much lower thermal design power. Its TDP of 45 watts is substantially below the E5-2643 v3's 135 watts, which makes it more suitable for dense, power-constrained deployments where sustained multi-core performance is less critical. The E5-2643 v3, with its higher clock speeds and larger per-core cache, is the better choice for workloads that depend on single-threaded response and higher memory bandwidth.

Architecture Differences

The two processors come from different microarchitectures and process nodes. The E5-2643 v3 is built on Haswell-EP using a 22 nm process, with 2,600 million transistors on a 356 mm² die. The D-1541 is built on Broadwell-DE using a 14 nm process, with 3,200 million transistors on a smaller 246 mm² die. The newer process node gives the D-1541 a higher transistor count in a smaller physical area, but the design goals differ: the E5-2643 v3 targets high-frequency server and workstation workloads, while the D-1541 targets power-efficient, integrated server platforms.

Cache organization also differs. Both chips share the same per-core L1 and L2 sizes (64 KB per core and 256 KB per core, respectively), but the L3 cache layout is distinct. The E5-2643 v3 has a 20 MB shared L3 cache across all six cores. The D-1541 has 1.5 MB of L3 per core, which totals to a smaller aggregate cache across its eight cores. This difference helps explain why the E5-2643 v3 maintains a consistent advantage in both single-core and multi-core Cinebench results despite having two fewer cores.

The memory controllers differ as well. The E5-2643 v3 supports DDR4 memory over a quad-channel interface with a recorded bandwidth of 68.3 GB/s. The D-1541 supports both DDR3 and DDR4 but uses a dual-channel interface, and its bandwidth figure is not recorded. The E5-2643 v3 also provides 40 PCIe Gen 3 lanes (CPU only), while the D-1541 provides 24 PCIe Gen 3 lanes (CPU only). The socket types reflect their different platforms: the E5-2643 v3 uses Intel Socket 2011-3, while the D-1541 is a BGA 1667 soldered chip.

Specification Differences

| Specification | Intel Xeon E5-2643 v3 | Intel Xeon D-1541 |

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

| Cores | 6 | 8 |

| Threads | 12 | 16 |

| Base clock | 3.40 GHz | 2.10 GHz |

| Boost clock | 3.70 GHz | 2.70 GHz |

| TDP | 135 W | 45 W |

| Socket | Intel Socket 2011-3 | Intel BGA 1667 |

| Architecture | Haswell | Broadwell |

| Process node | 22 nm | 14 nm |

| Transistors | 2,600 million | 3,200 million |

| Die size | 356 mm² | 246 mm² |

| L3 cache | 20 MB (shared) | 1.5 MB (per core) |

| Memory support | DDR4 | DDR3, DDR4 |

| Memory bus | Quad-channel | Dual-channel |

| Memory bandwidth | 68.3 GB/s | Not recorded |

| PCIe | Gen 3, 40 Lanes (CPU only) | Gen 3, 24 Lanes (CPU only) |

| Release date | 2014-09-07 | 2015-10-31 |

| Launch MSRP | $1552 | $581 |

| Production status | End-of-life | Active |

Head-to-Head Benchmarks

The head-to-head comparison covers six Cinebench workloads, and the E5-2643 v3 wins all of them. The largest margin is in Cinebench R15 multi-core, where the E5-2643 v3 scores 875 against the D-1541's 852, a 2.7% difference. This is notable because the D-1541 has two additional cores and four additional threads. The E5-2643 v3 compensates with a base clock of 3.40 GHz versus 2.10 GHz and a boost clock of 3.70 GHz versus 2.70 GHz, along with a shared 20 MB L3 cache that provides faster access to frequently used data.

In Cinebench R20 multi-core, the E5-2643 v3 scores 3646 versus the D-1541's 3554, a 2.6% lead. The R23 multi-core test shows a similar pattern: 8682 versus 8463, again a 2.6% difference. Across all three multi-core workloads, the E5-2643 v3 maintains a consistent margin of roughly 2.6% to 2.7%, suggesting that its higher clocks and cache configuration provide a stable advantage regardless of the workload version.

The single-core results are even more uniform. In Cinebench R15 single-core, the E5-2643 v3 scores 123 and the D-1541 scores 120, a 2.5% difference. In Cinebench R20 single-core, the scores are 514 and 501, a 2.6% lead. In Cinebench R23 single-core, the scores are 1225 and 1194, also a 2.6% lead. These results indicate that the E5-2643 v3's higher clock speeds translate directly into better single-threaded responsiveness, which matters for lightly threaded server workloads and latency-sensitive applications.

The D-1541's best showing is its 852-point result in Cinebench R15 multi-core, where it comes within 2.7% of the E5-2643 v3. Given its 45 watt TDP and dual-channel memory bus, this level of performance is efficient, but it does not overturn the E5-2643 v3's lead in any workload. The D-1541 also trails in the average benchmark comparison: its average score of 2447 places it near rivals like the Intel Core i5-10500 (2446, 0% delta) and the Intel Core i3-1125G4 (2451, -0.2% delta). The E5-2643 v3's average score of 2511 places it near the Intel Xeon E-2144G (2514, -0.1% delta) and the Intel Xeon E5-2630 v3 (2507, 0.2% delta).

The benchmark data shows a clear performance hierarchy: the E5-2643 v3 is faster in every measured workload, with margins ranging from 2.5% to 2.7%. The D-1541 offers more cores and threads, a newer process node, and a dramatically lower TDP, but it cannot match the E5-2643 v3's throughput in Cinebench tests. For workloads that are sensitive to single-threaded performance or that benefit from higher memory bandwidth, the E5-2643 v3 is the stronger choice. For environments where power draw and physical footprint are the primary constraints, the D-1541 remains a competitive option, but its measured performance is consistently behind.