Intel Core i5-1345UE vs Intel Xeon E5-2640 v3 Comparison

The Intel Xeon E5-2640 v3 and Intel Core i5-1345UE occupy opposite ends of the computing spectrum, yet their benchmark scores reveal a remarkably close race. The Xeon is a server-oriented Haswell-EP part from 2014, while the i5 is a modern Raptor Lake-U mobile processor. Despite an eight-year gap in release dates and radically different design goals, the data shows the Xeon edging out the Core i5 in every recorded Cinebench test, albeit by margins of only 0.2% or less. This analysis walks through the architectural differences, specification gaps, and benchmark results to determine which processor holds the advantage in specific scenarios.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Xeon E5-2640 v3 has an average benchmark score of 2703, while the Intel Core i5-1345UE scores 2698. This places the Xeon 0.2% ahead of the Core i5 in the nearestRivals data.

Q: How do the two chips compare in multi-core Cinebench R23 performance?

A: The Xeon E5-2640 v3 scores 9348 in Cinebench R23 multi-core, while the Core i5-1345UE scores 9329. The Xeon holds a 0.2% lead in this test.

Q: What is the difference in single-core performance between the two?

A: In Cinebench R23 single-core, the Xeon scores 1319 and the Core i5 scores 1317, giving the Xeon a 0.2% advantage. In both Cinebench R15 and R20 single-core tests, the scores are identical at 132 and 553, respectively.

Q: What are the core and thread counts for each processor?

A: The Xeon E5-2640 v3 has 8 cores and 16 threads. The Core i5-1345UE has 10 cores and 12 threads, featuring a hybrid architecture with fewer threads despite more physical cores.

Q: Which processor supports ECC memory?

A: The Xeon E5-2640 v3 supports ECC memory, while the Core i5-1345UE does not. This makes the Xeon suitable for error-correcting workloads in server environments.

Q: What is the production status of each chip?

A: The Xeon E5-2640 v3 is marked as End-of-life, while the Core i5-1345UE is listed as Active production. The Xeon was released on 2014-09-07, and the Core i5 was released on 2023-01-03.

Architecture Differences

The two processors stem from entirely different architectural lineages. The Xeon E5-2640 v3 is built on the Haswell-EP architecture using a 22 nm process node, with 2,600 million transistors packed into a 356 mm² die. In contrast, the Core i5-1345UE uses the Raptor Lake architecture on a 10 nm process node, though its transistor count and die size are not listed in the data. The Xeon's larger, older process reflects its server heritage, prioritizing raw throughput and reliability over efficiency.

Core configurations differ significantly. The Xeon offers 8 cores and 16 threads, relying on traditional symmetric multi-threading. The Core i5-1345UE provides 10 cores but only 12 threads, indicating a hybrid design with performance and efficiency cores that does not double thread count across all cores. Cache hierarchies also diverge: the Xeon has 64 KB L1 and 256 KB L2 per core, with 20 MB of shared L3 cache. The Core i5 has larger per-core caches at 80 KB L1 and 1.25 MB L2, but a smaller 12 MB shared L3.

Memory support highlights the different target markets. The Xeon uses quad-channel DDR4 memory with a theoretical bandwidth of 59.7 GB/s and supports ECC. The Core i5 uses dual-channel DDR4 or DDR5 memory, has no listed memory bandwidth figure, and does not support ECC. PCIe capabilities also differ, with the Xeon offering Gen 3 with 40 CPU lanes versus the Core i5's Gen 4 with 8 CPU lanes. The Core i5 includes integrated Iris Xe Graphics 80EU, while the Xeon has no integrated graphics.

The Verdict

The data presents an unusual situation where the older, server-class Xeon E5-2640 v3 outperforms the newer mobile Core i5-1345UE across all recorded benchmarks, though the margins are negligible. The Xeon wins all 6 head-to-head benchmark comparisons, with the largest delta being 0.2% in multi-core tests. Both processors sit at the 50th percentile among all CPUs, indicating they are statistically equivalent in overall performance.

The choice between these two should be driven by platform requirements rather than raw performance. The Xeon E5-2640 v3 is the clear pick for server or workstation deployments demanding ECC memory, quad-channel bandwidth, 40 PCIe lanes, and support for the Intel Socket 2011-3 platform. Its 90 W TDP and server market segment make it unsuitable for portable applications. The Core i5-1345UE, with its 15 W TDP and mobile BGA 1744 socket, is designed for thin-and-light laptops where power efficiency and integrated graphics are essential. Its active production status ensures ongoing availability, whereas the Xeon is end-of-life.

For users who need a processor for a new mobile device, the Core i5-1345UE is the only viable option given its socket and active status. For those building or upgrading a legacy server platform, the Xeon offers ECC support and higher memory bandwidth. In purely performance terms, the Xeon holds a razor-thin edge, but the practical use case will almost always dictate the correct choice.

Specification Differences

The table below highlights the fields where the two processors differ, based strictly on the FACT PACK data:

| Specification | Intel Xeon E5-2640 v3 | Intel Core i5-1345UE |

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

| Cores | 8 | 10 |

| Threads | 16 | 12 |

| Base Clock | 2.60 GHz | 1400.00 MHz |

| Boost Clock | 3.40 GHz | 4.60 GHz |

| TDP | 90 W | 15 W |

| Socket | Intel Socket 2011-3 | Intel BGA 1744 |

| Architecture | Haswell | Raptor Lake |

| Codename | Haswell-EP | Raptor Lake-U |

| Process Node | 22 nm | 10 nm |

| Transistors | 2,600 million | null |

| Die Size | 356 mm² | null |

| L1 Cache | 64 KB (per core) | 80 KB (per core) |

| L2 Cache | 256 KB (per core) | 1.25 MB (per core) |

| L3 Cache | 20 MB (shared) | 12 MB (shared) |

| Memory Support | DDR4 | DDR4, DDR5 |

| Memory Bus | Quad-channel | Dual-channel |

| Memory Bandwidth | 59.7 GB/s | null |

| ECC Memory | true | false |

| PCIe | Gen 3, 40 Lanes (CPU only) | Gen 4, 8 Lanes (CPU only) |

| Integrated Graphics | null | Iris Xe Graphics 80EU |

| Market Segment | Server/Workstation | Mobile |

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

| Release Date | 2014-09-07 | 2023-01-03 |

| Launch MSRP | $939 | null |

Head-to-Head Benchmarks

The head-to-head benchmark data shows a consistent, though minimal, advantage for the Xeon E5-2640 v3 in every test. In Cinebench R15 multi-core, the Xeon scores 942 against the Core i5's 940, a 0.2% lead. The single-core R15 test is a dead heat at 132 for both processors, with a delta of 0%. This pattern repeats in Cinebench R20, where the Xeon wins multi-core 3926 to 3918 (0.2%) and ties single-core at 553.

The largest absolute gap appears in Cinebench R23 multi-core, where the Xeon scores 9348 versus the Core i5's 9329, again a 0.2% difference. The R23 single-core test shows the Xeon at 1319 and the Core i5 at 1317, a 0.2% edge. Across all six benchmarks, the Xeon's biggest win is 19 points in R23 multi-core, while the smallest margin is a tie in two single-core tests. These results suggest that the Xeon's additional threads and larger L3 cache provide a marginal edge in multi-threaded workloads, while single-core performance is essentially identical despite the Core i5's higher boost clock.

Where Each One Wins

The Xeon E5-2640 v3 wins in all six recorded benchmarks, making it the performance leader in both single-core and multi-core Cinebench tests. Its advantages are rooted in server-oriented features: 16 threads for parallel workloads, 20 MB of shared L3 cache, quad-channel memory bandwidth of 59.7 GB/s, and 40 PCIe Gen 3 lanes. The Xeon is the appropriate choice for fixed installations where ECC memory is mandatory, such as data integrity-sensitive server tasks, or where the existing Socket 2011-3 platform is already in use. Its 90 W TDP is a non-issue for desktop or rack-mounted systems with adequate cooling.

The Core i5-1345UE wins in the context of platform suitability rather than benchmark scores. Its 15 W TDP makes it the only realistic option for passively cooled or battery-powered mobile devices. The integrated Iris Xe Graphics 80EU eliminates the need for a discrete GPU in basic display tasks, which the Xeon cannot offer. The Core i5 supports both DDR4 and DDR5 memory, providing flexibility in system design, and its Gen 4 PCIe interface offers higher per-lane bandwidth than the Xeon's Gen 3. Active production status ensures long-term availability for OEM designs. For any workload that must run on a laptop, the Core i5-1345UE is the sole choice between these two, despite trailing slightly in every Cinebench metric.