Intel Core Ultra 5 250K Plus vs Intel Xeon w5-3525 Comparison

The Intel Xeon w5-3525 and the Intel Core Ultra 5 250K Plus represent two fundamentally different answers to the question of what a CPU should be. The Xeon is a workstation-class behemoth designed for sustained, high-throughput compute, while the Core Ultra 5 is a power-efficient desktop part built for responsiveness and modern features. The benchmark data shows a clear split: the Xeon wins in some heavy multi-threaded tasks, but the Core Ultra 5 dominates a wider range of workloads, particularly single-threaded and integer-heavy ones.

Head-to-Head Benchmarks

The most dramatic result is in Cinebench R23 single-core, where the Xeon w5-3525 scores 5500 against the Core Ultra 5's 2261, a 143.3% lead for the Xeon. This is a stunning reversal of expectations, as the Core Ultra 5 has a higher boost clock of 5.30 GHz compared to the Xeon's 4.80 GHz. The Xeon also wins Cinebench R23 multi-core, scoring 38964 versus 30867, a 26.2% advantage, showing that its 16 cores with 32 threads can outmuscle the Ultra 5's 18 cores with 18 threads in this particular rendering test.

However, the Core Ultra 5 strikes back hard in the older Cinebench R20 and R15 multi-core tests. It wins Cinebench R20 multi-core with 18442 against the Xeon's 16364 (an 11.3% lead) and Cinebench R15 multi-core with 4640 against 3927 (a 15.4% lead). The single-core results in R20 and R15 also favor the Core Ultra 5, with scores of 2603 and 328 respectively, beating the Xeon's 2310 and 554 by 11.3% and 68.9% respectively. This inconsistency between Cinebench versions suggests the Xeon's advantage is workload-specific, not universal.

In the Passmark suite, the Core Ultra 5 wins 8 of the 11 tests. Its most impressive victory is in passmark_find_prime_numbers, where it scores 486 against the Xeon's 218, a massive 55.1% lead. It also wins passmark_data_encryption by 27.6% (42144 vs 30507) and passmark_floating_point_math by 25.6% (162692 vs 121050). The Core Ultra 5 also takes passmark_single_thread with 4757 versus 3330, a 30% lead, and passmark_multithread with 51596 versus 45841, an 11.2% lead.

The Xeon's wins in the Passmark suite are fewer but meaningful. It leads passmark_integer_math by 24.1% (155282 vs 125091), passmark_extended_instructions by 10.5% (49242 vs 44565), and passmark_data_compression by 6.8% (607435 vs 568721). Overall, the Core Ultra 5 wins 11 of the 17 head-to-head benchmarks, while the Xeon wins 6.

Architecture Differences

The two CPUs are built on completely different silicon. The Xeon w5-3525 uses the Sapphire Rapids architecture on a 10 nm process, fabricated by Intel, with a die size of 4x 477 mm². The Core Ultra 5 250K Plus uses the Arrow Lake Refresh architecture on a 3 nm process, fabricated by TSMC, with a die size of 243 mm² and 17,800 million transistors. The Xeon has 16 cores and 32 threads, while the Core Ultra 5 has 18 cores and 18 threads, meaning the Xeon uses simultaneous multithreading while the Core Ultra 5 does not.

Cache hierarchies differ significantly. The Xeon has 80 KB of L1 per core and 2 MB of L2 per core, with a 45 MB L3 cache. The Core Ultra 5 has 192 KB of L1 per core and 3 MB of L2 per core, with a 30 MB shared L3 cache. The Xeon supports eight-channel DDR5 memory with a bandwidth of 307.2 GB/s, while the Core Ultra 5 supports dual-channel DDR5 with a bandwidth of 115.2 GB/s. Both support ECC memory, but the Xeon has 112 PCIe Gen 5 lanes (CPU only), while the Core Ultra 5 has 20 PCIe Gen 5 lanes (CPU only). The Core Ultra 5 includes integrated Arc Xe-LPG Graphics 64EU, while the Xeon has no integrated graphics.

FAQ

Q: Which CPU has a higher base clock speed?

A: The Intel Core Ultra 5 250K Plus has a base clock of 4.20 GHz, while the Intel Xeon w5-3525 has a base clock of 3.20 GHz.

Q: Which CPU has more L3 cache?

A: The Intel Xeon w5-3525 has 45 MB of L3 cache, while the Intel Core Ultra 5 250K Plus has 30 MB of shared L3 cache.

Q: Does the Intel Core Ultra 5 250K Plus have an unlocked multiplier?

A: Yes, the Core Ultra 5 250K Plus has an unlocked multiplier, while the Xeon w5-3525 does not.

Q: Which CPU has a higher average benchmark score?

A: The Xeon w5-3525 has an average benchmark score of 67673, slightly higher than the Core Ultra 5's 66855. The Xeon also sits at the 94th percentile of all CPUs, while the Core Ultra 5 sits at the 93rd percentile.

Q: Which CPU supports more memory channels?

A: The Xeon w5-3525 supports eight-channel memory, while the Core Ultra 5 250K Plus supports dual-channel memory.

Q: What is the memory bandwidth difference?

A: The Xeon w5-3525 has a memory bandwidth of 307.2 GB/s, which is more than double the Core Ultra 5's 115.2 GB/s.

The Verdict

The data paints a clear picture for different use cases. The Intel Xeon w5-3525 is the choice for workloads that demand extreme memory bandwidth and sustained multi-threaded compute. Its 26.2% lead in Cinebench R23 multi-core, 24.1% lead in integer math, and 10.5% lead in extended instructions show it excels in specific server and workstation tasks. Its eight-channel memory support and 307.2 GB/s bandwidth are unmatched by the Core Ultra 5's dual-channel 115.2 GB/s. However, its 290 W TDP, lack of an unlocked multiplier, and higher launch MSRP of $1339 indicate it is a professional tool, not a consumer part.

The Intel Core Ultra 5 250K Plus is the more versatile processor. It wins more benchmarks overall (11 vs 6), including a 30% lead in single-threaded performance, a 55.1% lead in prime number finding, and a 25.6% lead in floating-point math. Its 125 W TDP, 3 nm process, and integrated graphics make it far more efficient and practical for a desktop system. With a launch MSRP of $199, it targets a completely different market segment. For most users, the Core Ultra 5 is the better all-around performer, but for those who need the Xeon's specific strengths, the gap in memory bandwidth and certain compute tasks is decisive.

Specification Differences

| Specification | Intel Xeon w5-3525 | Intel Core Ultra 5 250K Plus |

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

| Cores | 16 | 18 |

| Threads | 32 | 18 |

| Base Clock | 3.20 GHz | 4.20 GHz |

| Boost Clock | 4.80 GHz | 5.30 GHz |

| TDP | 290 W | 125 W |

| Socket | Intel Socket 4677 | Intel Socket 1851 |

| Codename | Sapphire Rapids | Arrow Lake Refresh |

| Process Node | 10 nm | 3 nm |

| Foundry | Intel | TSMC |

| Die Size | 4x 477 mm² | 243 mm² |

| L1 Cache | 80 KB (per core) | 192 KB (per core) |

| L2 Cache | 2 MB (per core) | 3 MB (per core) |

| L3 Cache | 45 MB | 30 MB (shared) |

| Memory Bus | Eight-channel | Dual-channel |

| Memory Bandwidth | 307.2 GB/s | 115.2 GB/s |

| PCIe Lanes | Gen 5, 112 Lanes (CPU only) | Gen 5, 20 Lanes (CPU only) |

| Integrated Graphics | N/A | Arc Xe-LPG Graphics 64EU |

| Launch MSRP | $1339 | $199 |

| Multiplier Unlocked | No | Yes |

Where Each One Wins

The Intel Xeon w5-3525 is the winner for server and workstation deployments where memory bandwidth is the bottleneck. Its 307.2 GB/s eight-channel memory bus provides a massive advantage over the Core Ultra 5's 115.2 GB/s. It also wins in Cinebench R23 multi-core (38964 vs 30867), integer math (155282 vs 125091), extended instructions (49242 vs 44565), and data compression (607435 vs 568721). These are the workloads of scientific computing, large-scale virtualization, and complex data analysis where the extra threads and memory throughput translate directly to faster completion times.

The Intel Core Ultra 5 250K Plus wins for desktop users, gamers, and content creators who need strong single-thread performance and a balanced feature set. It leads in passmark_single_thread (4757 vs 3330), floating-point math (162692 vs 121050), data encryption (42144 vs 30507), and find_prime_numbers (486 vs 218). Its 18 cores, while lacking hyperthreading, still deliver a win in passmark_multithread (51596 vs 45841). The 3 nm process and 125 W TDP make it a far more manageable part for a standard desktop build. The integrated Arc Xe-LPG Graphics 64EU provides a fallback display output, and the unlocked multiplier offers overclocking headroom that the Xeon completely lacks. For any task where a single thread's speed matters, the Core Ultra 5 is the clear choice.