Intel Core i5-1250P vs Intel Xeon W-2145 Comparison

The Intel Xeon W-2145 and Intel Core i5-1250P represent two very different philosophies from Intel: a workstation-class Skylake-W part designed for sustained server loads, and a mobile Alder Lake-P chip built for efficiency. Despite their disparate origins, the benchmark data places them in a surprisingly close performance tier, with the average benchmark score of the Xeon W-2145 at 4576 and the i5-1250P at 4515. This puts both processors at the 58th percentile of all CPUs, indicating that their overall performance levels are nearly indistinguishable in the eyes of the database. The head-to-head results tell a consistent story, yet the architecture behind those numbers could not be more different.

Head-to-Head Benchmarks

The i5-1250P wins every single head-to-head benchmark contest, but the margins are razor-thin. In Cinebench R15 multicore, the i5-1250P scores 1573 against the Xeon W-2145’s 1542, a delta of -2% from the Xeon’s perspective. That same 2% gap repeats in Cinebench R20 multicore, where the i5-1250P hits 6556 versus 6425, and in Cinebench R23 multicore, where the mobile chip scores 15610 against 15299. The consistency of this ~2% margin across all three multicore tests suggests a systematic advantage rather than a workload-specific quirk.

Single-core results follow the same pattern, with the i5-1250P edging ahead by slightly larger margins. In Cinebench R15 single-core, the i5-1250P scores 222 versus 217, a -2.3% delta. Cinebench R20 single-core shows 925 versus 906, a -2.1% delta, and Cinebench R23 single-core shows 2203 versus 2159, a -2% delta. The i5-1250P’s single-core advantage is marginally more pronounced than its multicore lead, which hints at the architectural efficiency of the newer Alder Lake design. Notably, the Xeon W-2145 does not appear in the head-to-head Geekbench results, but its standalone scores of 8712 multicore and 1345 single-core place it in the same competitive band as the i5-1250P’s Cinebench performance.

The near-total parity in these results is remarkable given the age difference. The Xeon W-2145 launched on 2017-08-28 with a launch MSRP of $1113, while the i5-1250P arrived on 2022-02-22. A five-year gap in release dates typically yields a generational leap in performance, but here the older workstation chip holds its ground within 2-3% across every test. The data implies that the Xeon’s higher TDP of 140 watts and larger 484 mm² die size are not translating into raw performance superiority over the 28-watt mobile chip.

Architecture Differences

The architectural divide between these two processors is substantial. The Xeon W-2145 uses the Skylake architecture on a 14 nm process node, manufactured by Intel with a die size of 484 mm². It features 8 cores and 16 threads, with a base clock of 3.70 GHz and a boost clock of 4.50 GHz. The i5-1250P, by contrast, uses the Alder Lake architecture on a 10 nm process, with a die size of 217 mm² — less than half the physical silicon of the Xeon. It packs 12 cores and 16 threads, running at a base clock of 1700.00 MHz (1.70 GHz) and a boost clock of 4.40 GHz.

The cache hierarchies differ significantly. The Xeon W-2145 has 64 KB of L1 cache per core, 1 MB of L2 per core, and 11 MB of shared L3 cache. The i5-1250P has 80 KB of L1 per core, 1.25 MB of L2 per core, and 12 MB of shared L3 cache. Despite having fewer physical cores, the Xeon has a smaller L3 cache, but its per-core L2 is also slightly smaller at 1 MB versus 1.25 MB. The i5-1250P’s higher core count (12 versus 8) is offset by its much lower base clock, which explains why the multicore scores remain so close.

Memory support is another clear divergence. The Xeon W-2145 supports DDR4 memory over a quad-channel bus, delivering a memory bandwidth of 85.3 GB/s, and it supports ECC memory. The i5-1250P supports both DDR4 and DDR5 over a dual-channel bus, with no listed memory bandwidth figure and no ECC support. The Xeon’s quad-channel design and ECC capability are hallmarks of a workstation/server part, while the i5-1250P’s dual-channel flexibility and lack of ECC reflect its mobile consumer orientation.

PCIe connectivity also differs: the Xeon W-2145 offers PCIe Gen 3 with 48 lanes (CPU only), while the i5-1250P offers PCIe Gen 4 with 20 lanes (CPU only). The Xeon’s lane count is more than double, but the i5-1250P’s Gen 4 standard doubles the per-lane bandwidth. Integrated graphics are present only on the i5-1250P, which includes Iris Xe 80EU; the Xeon W-2145 has none. The production status also splits them: the Xeon is end-of-life, while the i5-1250P is active.

FAQ

Q: Which processor has more cores?

A: The Intel Core i5-1250P has 12 cores, while the Intel Xeon W-2145 has 8 cores. Both support 16 threads.

Q: Why does the i5-1250P win all head-to-head benchmarks despite having a much lower base clock?

A: The i5-1250P has a base clock of 1700.00 MHz versus the Xeon’s 3.70 GHz, but its boost clock of 4.40 GHz is close to the Xeon’s 4.50 GHz. The newer Alder Lake architecture on a 10 nm process, combined with 12 cores versus 8, allows the i5-1250P to achieve a 2-2.3% edge in every Cinebench test.

Q: Does the Xeon W-2145 support ECC memory?

A: Yes, the Xeon W-2145 supports ECC memory. The i5-1250P does not support ECC.

Q: What is the memory bandwidth difference between the two?

A: The Xeon W-2145 has a memory bandwidth of 85.3 GB/s through its quad-channel DDR4 bus. The i5-1250P has no listed memory bandwidth figure, but it uses a dual-channel bus supporting DDR4 and DDR5.

Q: Are there any benchmark categories where the Xeon W-2145 outperforms the i5-1250P?

A: In the head-to-head benchmark data, the Xeon W-2145 wins zero tests. The i5-1250P wins all 6 tests. However, the Xeon’s standalone Geekbench scores (8712 multicore, 1345 singlecore) show it remains competitive, though no direct comparison is provided.

Q: Which processor has more PCIe lanes?

A: The Xeon W-2145 has 48 PCIe Gen 3 lanes (CPU only), while the i5-1250P has 20 PCIe Gen 4 lanes (CPU only).

Specification Differences

| Specification | Intel Xeon W-2145 | Intel Core i5-1250P |

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

| Cores | 8 | 12 |

| Base Clock | 3.70 GHz | 1700.00 MHz |

| Boost Clock | 4.50 GHz | 4.40 GHz |

| TDP | 140 W | 28 W |

| Socket | Intel Socket 2066 | Intel BGA 1744 |

| Architecture | Skylake | Alder Lake |

| Codename | Skylake-W | Alder Lake-P |

| Process Node | 14 nm | 10 nm |

| Die Size | 484 mm² | 217 mm² |

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

| L2 Cache | 1 MB (per core) | 1.25 MB (per core) |

| L3 Cache | 11 MB (shared) | 12 MB (shared) |

| Memory Support | DDR4 | DDR4, DDR5 |

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

| Memory Bandwidth | 85.3 GB/s | Not listed |

| ECC Memory | Yes | No |

| PCIe | Gen 3, 48 Lanes | Gen 4, 20 Lanes |

| Integrated Graphics | None | Iris Xe 80EU |

| Market Segment | Server/Workstation | Mobile |

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

| Release Date | 2017-08-28 | 2022-02-22 |

| Launch MSRP | $1113 | Not listed |

| Part Number | SR3LQ | SRLD8 |

Where Each One Wins

The i5-1250P wins every head-to-head benchmark, making it the clear victor in raw performance across Cinebench R15, R20, and R23, both single-core and multicore. Its largest margin is 2.3% in Cinebench R15 single-core, and its smallest is 2% in the multicore tests. This means for everyday tasks that rely on single-threaded speed or lightly threaded workloads, the i5-1250P holds a slight but consistent edge. Its 12-core configuration also gives it a theoretical advantage in heavily threaded applications, though the benchmark data shows that advantage is muted in practice.

The Xeon W-2145, despite losing all head-to-head tests, wins in areas that the benchmarks do not capture. Its quad-channel memory bus with 85.3 GB/s bandwidth and ECC support make it the superior choice for memory-intensive workstation tasks where data integrity is paramount. Its 48 PCIe Gen 3 lanes provide far more expansion capacity for multiple GPUs or high-speed storage controllers. The Xeon’s 140 W TDP and server/workstation market segment indicate it is designed for sustained all-core loads in a chassis with robust cooling, whereas the i5-1250P’s 28 W TDP targets thin-and-light mobile devices.

The architecture also favors the Xeon in one critical way: its 484 mm² die size on a 14 nm process suggests a design optimized for maximum throughput per core, with a high 3.70 GHz base clock. The i5-1250P’s 217 mm² die on 10 nm is more about efficiency, with a much lower base clock of 1700.00 MHz. The data shows that the i5-1250P’s boost clock of 4.40 GHz is nearly identical to the Xeon’s 4.50 GHz, but the Xeon can sustain its base clock indefinitely without thermal throttling in a proper workstation environment.

The Verdict

For raw benchmark performance, the Intel Core i5-1250P is the winner, taking all 6 head-to-head tests with margins between 2% and 2.3%. Its 12-core Alder Lake architecture on a 10 nm process delivers a slight but measurable advantage over the 8-core Skylake Xeon across every Cinebench workload. The i5-1250P also offers modern features like PCIe Gen 4 support and integrated Iris Xe 80EU graphics, making it a more versatile all-rounder for someone who needs a single chip for both compute and display output.

The Intel Xeon W-2145, however, is not obsolete despite its end-of-life status. Its quad-channel DDR4 memory with 85.3 GB/s bandwidth and ECC support are irreplaceable for certain professional workloads, such as financial modeling or scientific computing where a memory error is unacceptable. Its 48 PCIe Gen 3 lanes allow for expansion that the i5-1250P simply cannot match. The Xeon’s 140 W TDP and server-grade construction imply it can run at its 3.70 GHz base clock indefinitely, while the i5-1250P’s 28 W TDP means it will likely spend most of its time at lower clocks under sustained load unless actively cooled.

The data suggests a clear split: the i5-1250P wins on performance per watt and everyday responsiveness, while the Xeon W-2145 wins on memory bandwidth, ECC reliability, and expansion capability. If your priority is maximum Cinebench scores in a compact mobile form factor, the i5-1250P is the answer. If you need a workstation CPU with robust memory integrity and massive PCIe lane count for server duties, the Xeon W-2145 remains relevant, even though its benchmark scores are 2% lower across the board. The launch MSRP of $1113 for the Xeon also reflects its professional positioning, whereas the i5-1250P has no listed launch price, further emphasizing its role as a mobile component rather than a standalone workstation purchase.