Intel Core Ultra 5 135H vs Intel Xeon 6337P Comparison

Head-to-Head Benchmarks

The head-to-head data reveals a split personality between these two Intel processors. The Xeon 6337P takes 11 of the 17 benchmark comparisons, while the Core Ultra 5 135H wins 6. But the margins tell a more interesting story than the raw win count.

The Xeon's most dominant victories come in the Cinebench R23 suite. In multi-core, the Xeon scores 18783 against the Ultra 5's 11875.5, a 36.8% advantage. Single-core R23 shows a similar gap: 2651 versus 1700, a 35.9% lead for the Xeon. These are not small differences; they represent fundamental performance tiers in sustained rendering workloads.

Cinebench R15 follows the same pattern but with smaller gaps. The Xeon leads multi-core by 9.2% (1893 versus 1718) and single-core by 8.6% (267 versus 244). Interestingly, Cinebench R20 nearly erases the multi-core gap entirely: the Xeon scores 7888 versus 7834, a mere 0.7% lead. Single-core R20 is similarly tight at 0.7% (1113 versus 1105). This suggests that the R23 test, with its longer duration, exposes thermal or power characteristics that favor the Xeon more strongly.

The Ultra 5 fights back in several Passmark tests. Its biggest win is data encryption, where it scores 15026 against the Xeon's 12604, a 19.2% advantage. Data compression also favors the Ultra 5 by 6% (251651 versus 237373). Random string sorting goes to the Ultra 5 by 10.9% (28980 versus 26135). Floating point math, integer math, and multithread scores all edge toward the Ultra 5, with margins of 3.2%, 1.7%, and 1.5% respectively.

The Xeon counters in Passmark physics (1729 versus 1482, a 14.3% lead), find prime numbers (108 versus 89, a 17.6% lead), and single-thread performance (4104 versus 3521, a 14.2% lead). Extended instructions go narrowly to the Xeon at 2.2% (15366 versus 15028).

Where Each One Wins

The benchmark breakdown points to distinct use-case strengths. The Xeon 6337P is the clear choice for single-thread-heavy workloads. Its single-core wins across every Cinebench generation, plus the Passmark single-thread test, indicate superior per-core performance. The 14.2% advantage in Passmark single-thread and 35.9% in R23 single-core are decisive. Applications that rely on one or two fast cores, such as legacy software, certain simulation tools, or lightly threaded productivity apps, would benefit from the Xeon.

Physics simulation also favors the Xeon substantially. The 14.3% lead in Passmark physics suggests better handling of rigid body dynamics and collision detection, common in engineering and scientific workloads. Prime number finding, often used in cryptography and mathematical research, shows a 17.6% Xeon advantage.

The Ultra 5 135H dominates in data handling and encryption tasks. The 19.2% lead in data encryption is particularly notable, suggesting hardware or microarchitecture advantages in cryptographic operations. Data compression shows a 6% edge, which benefits file archiving, database operations, and content delivery workloads. Random string sorting, relevant to database indexing and text processing, favors the Ultra 5 by 10.9%.

For mixed workloads, the Ultra 5's wins in floating point math (3.2%), integer math (1.7%), and multithread (1.5%) are narrow but consistent. These are general-purpose computing tasks, and the Ultra 5 holds a slight edge despite having fewer threads in some configurations. The Xeon's Cinebench R23 multi-core dominance, however, suggests that sustained all-core rendering workloads strongly prefer the Xeon. The 36.8% gap in R23 multi-core is the single largest difference in the entire dataset.

Architecture Differences

The two processors come from different architectural lineages. The Core Ultra 5 135H uses Meteor Lake, built on Intel's 7 nm process. The Xeon 6337P uses Raptor Lake-R, built on a 10 nm process. This process difference is counterintuitive given the Xeon's performance advantages; the newer node does not automatically translate to faster cores.

Core counts differ significantly. The Ultra 5 has 14 cores and 18 threads, while the Xeon has 6 cores and 12 threads. Despite having fewer cores, the Xeon wins most multi-threaded tests, indicating that its individual cores are substantially more powerful. Cache layouts also differ: the Ultra 5 has 112 KB L1 per core and 2 MB L2 per core, while the Xeon has 80 KB L1 per core and 1.25 MB L2 per core. Both share 18 MB L3, creating an interesting parity at the last-level cache.

Clock speeds tell part of the story. The Xeon boosts to 5.30 GHz versus the Ultra 5's 4.60 GHz, while base clocks are closer at 3.50 GHz versus 3.60 GHz. The Xeon's higher boost clock likely drives its single-core supremacy. Thermal design power differs dramatically: the Xeon is rated at 80 watts versus the Ultra 5's 28 watts, explaining why the Xeon can sustain higher clocks under load.

Memory support diverges. The Xeon supports both DDR4 and DDR5, while the Ultra 5 supports DDR5 with capacity depending on motherboard. The Xeon also supports ECC memory, which the Ultra 5 does not. PCIe lanes favor the Xeon at 16 lanes versus 8 lanes, both Gen 5. The Ultra 5 includes integrated Arc Xe-LPG 96EU graphics, while the Xeon has no integrated graphics. Socket types differ as expected: BGA 2049 for the mobile Ultra 5, Socket 1700 for the server Xeon.

FAQ

Q: Which processor is faster in single-core performance?

A: The Xeon 6337P wins every single-core comparison. Cinebench R23 shows a 35.9% lead (2651 versus 1700), R20 shows 0.7% (1113 versus 1105), R15 shows 8.6% (267 versus 244), and Passmark single-thread shows 14.2% (4104 versus 3521).

Q: Does the Core Ultra 5 135H win any benchmarks?

A: Yes, it wins 6 of 17 head-to-head tests. Its largest victory is data encryption at 19.2% (15026 versus 12604), followed by random string sorting at 10.9% (28980 versus 26135) and data compression at 6% (251651 versus 237373). It also narrowly wins floating point math, integer math, and multithread tests.

Q: How do their multi-core Cinebench scores compare?

A: Results vary by test version. In R23, the Xeon leads by 36.8% (18783 versus 11875.5). In R15, the lead is 9.2% (1893 versus 1718). In R20, the Xeon leads by only 0.7% (7888 versus 7834). The R23 gap suggests the Xeon maintains performance advantage over longer workloads.

Q: Do both processors support ECC memory?

A: No. The Xeon 6337P supports ECC memory, while the Core Ultra 5 135H does not. This makes the Xeon more suitable for error-sensitive server or workstation environments.

Q: What are their thermal design power ratings?

A: The Xeon 6337P is rated at 80 watts, while the Core Ultra 5 135H is rated at 28 watts. This significant difference helps explain the Xeon's higher sustained clock speeds and performance in long multi-core workloads.

Q: Which processor has integrated graphics?

A: Only the Core Ultra 5 135H includes integrated graphics, specifically Arc Xe-LPG 96EU. The Xeon 6337P has no integrated graphics, requiring a discrete GPU for display output.

Specification Differences

| Specification | Core Ultra 5 135H | Xeon 6337P |

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

| Cores | 14 | 6 |

| Threads | 18 | 12 |

| Base Clock | 3.60 GHz | 3.50 GHz |

| Boost Clock | 4.60 GHz | 5.30 GHz |

| TDP | 28 W | 80 W |

| Process Node | 7 nm | 10 nm |

| L1 Cache | 112 KB per core | 80 KB per core |

| L2 Cache | 2 MB per core | 1.25 MB per core |

| L3 Cache | 18 MB shared | 18 MB shared |

| Memory Support | DDR5 | DDR4, DDR5 |

| ECC Memory | No | Yes |

| PCIe | Gen 5, 8 lanes | Gen 5, 16 lanes |

| Integrated Graphics | Arc Xe-LPG 96EU | N/A |

| Socket | Intel BGA 2049 | Intel Socket 1700 |

| Market Segment | Mobile | Server/Workstation |

| Launch MSRP | $342 | $375 |

| Release Date | 2023-12-13 | 2025-02-23 |

The Verdict

The data presents a clear choice based on workload priorities. The Xeon 6337P is the stronger all-around performer in most benchmarks, winning 11 of 17 comparisons. Its single-core dominance is overwhelming, with margins reaching 35.9% in Cinebench R23. For users running lightly threaded applications, simulation software, or any workload that depends on raw clock speed, the Xeon is the obvious pick. Its ECC memory support and 16 PCIe lanes also make it suitable for professional workstations and entry-level servers.

The Core Ultra 5 135H is not without merit. It wins in data encryption, compression, and string sorting, making it a better choice for database-heavy or security-focused tasks. Its integrated graphics add versatility for systems without discrete GPUs. The 28-watt TDP suggests far lower power consumption, though the database does not provide direct efficiency measurements. Mobile users should note the BGA socket, which means it is soldered to the motherboard and not upgradeable.

The Xeon's 80-watt TDP and Socket 1700 imply a desktop or server platform with more robust cooling and power delivery. Its 18 MB L3 cache matches the Ultra 5, showing that cache capacity is not the differentiator. The architecture differences, Meteor Lake versus Raptor Lake-R, produce distinct strengths: the Ultra 5 excels in data-centric operations while the Xeon excels in compute-centric operations.

For rendering, physics simulation, and single-thread productivity, the Xeon 6337P wins decisively. For encryption, compression, and mixed general-purpose workloads, the Core Ultra 5 135H holds its own despite lower clock speeds and fewer threads. The choice ultimately depends on whether the user prioritizes the Xeon's 36.8% R23 multi-core advantage or the Ultra 5's 19.2% encryption edge. The data does not support a single universal winner; it supports two specialized tools for different jobs.