Intel Core Ultra 5 245KF vs Intel Xeon 634 Comparison

The Intel Core Ultra 5 245KF and the Intel Xeon 634 are both high-performance Intel processors, but they target radically different segments of the market. The former is a desktop part built for mainstream performance, while the latter is a workstation/server chip designed for sustained throughput. The benchmark data reveals a fascinating split: the Core Ultra dominates in most latency-sensitive and single-threaded tasks, while the Xeon flexes its muscles in specific integer-heavy workloads. Both processors sit at the 91st percentile in the database, indicating they outperform the vast majority of installed CPUs, yet they achieve this status through entirely different architectural philosophies.

Head-to-Head Benchmarks

The most striking pattern in the head-to-head results is the Core Ultra 5 245KF's dominance across Cinebench and most Passmark tests. In all six Cinebench iterations (R15, R20, and R23, both single and multi-core), the Core Ultra wins with a remarkably consistent delta of 14.7% in multi-core tests and a similar 14.7% to 14.8% in single-core runs. For example, in Cinebench R23 multi-core, the Core Ultra scores 36,647 against the Xeon's 31,950, a lead of 14.7%. This consistency suggests a fundamental clock-speed and IPC advantage rather than a workload-specific edge.

The single-thread gap is even more pronounced. The Core Ultra 5 245KF achieves a Passmark single-thread score of 4,715, while the Xeon 634 manages only 3,567, representing a 32.2% advantage for the desktop chip. This is a massive margin and directly reflects the Core Ultra's 5.20 GHz boost clock compared to the Xeon's 4.60 GHz. The story repeats in Cinebench R15 single-core, where the Core Ultra's 521 points eclipse the Xeon's 454 by 14.8%.

However, the Xeon 634 claims three notable victories that reveal its specialized strengths. The most significant win is in Passmark integer math, where the Xeon scores 117,664 against the Core Ultra's 98,854, a 16% advantage. This is a substantial lead and points to the Xeon's wider execution resources or more efficient integer pipeline. Additionally, the Xeon wins in data compression with a score of 477,924 versus 460,123, a 3.7% margin, and in extended instructions with 38,320 versus 37,912, a slim 1.1% edge. These wins, while fewer in number, are meaningful for specific enterprise workloads.

The Core Ultra's other wins are decisive. In passmark floating point math, it scores 131,546 against the Xeon's 93,564, a 40.6% lead. Data encryption shows a 42.3% advantage (33,381 vs 23,451), and the find prime numbers test is a blowout: 416 vs 196, a 112.2% delta. The physics test also favors the Core Ultra by 33.2% (2,998 vs 2,250), and random string sorting goes to the Core Ultra by 17.4% (55,206 vs 47,016). Overall, the Core Ultra wins 14 of the 17 head-to-head tests, with the Xeon taking only three.

Where Each One Wins

The Core Ultra 5 245KF is the clear winner for general-purpose desktop computing, content creation, and any workload that relies on high clock speeds and strong single-thread performance. Its 32.2% lead in Passmark single-thread and 14.7% lead across all Cinebench multi-core tests make it the superior choice for gaming, software compilation, video editing, and typical office productivity. The data also shows it excels in cryptographic tasks (data encryption up 42.3%) and scientific calculations (floating point math up 40.6%), making it a well-rounded performer for power users.

The Xeon 634's wins are narrower but strategically important. Its 16% advantage in integer math makes it better suited for database operations, financial modeling, and other integer-heavy enterprise software. The 3.7% lead in data compression suggests it can handle archival and backup workloads with slightly better efficiency. The 1.1% edge in extended instructions is marginal but indicates the Xeon's instruction set handling is on par with the newer desktop chip in certain SIMD-heavy tasks. For a server environment where these specific workloads dominate, the Xeon's strengths are relevant, but they are niche compared to the Core Ultra's broad superiority.

It is also worth remembering the Xeon 634's 24 threads (12 cores with Hyper-Threading) do not translate into a multi-threaded victory. The Core Ultra 5 245KF, with its 14 cores and 14 threads, still wins Passmark multithread by 14.7% (43,110 vs 37,589) and all Cinebench multi-core tests by the same margin. This suggests the Core Ultra's individual cores are so much faster that its lower thread count is irrelevant for these workloads.

Architecture Differences

The two processors are built on fundamentally different architectures and process nodes. The Core Ultra 5 245KF uses Arrow Lake, built on a 3 nm process at TSMC, with a die size of 243 mm² and 17,800 million transistors. The Xeon 634 uses Granite Rapids, built on Intel's 5 nm process, with a significantly larger die size of 598 mm². The Xeon's larger die accommodates more cache: 48 MB of shared L3 versus 24 MB on the Core Ultra, and the Xeon also has dual-channel memory support replaced by quad-channel, doubling theoretical memory bandwidth from 102.4 GB/s to 204.8 GB/s.

Clock speeds differ substantially. The Core Ultra runs at a 4.20 GHz base and 5.20 GHz boost, while the Xeon operates at 2.70 GHz base and 4.60 GHz boost. This 0.6 GHz boost advantage for the Core Ultra explains much of its single-thread dominance. The Core Ultra also has a higher per-core L1 cache (192 KB vs 112 KB) and L2 cache (3 MB vs 2 MB), though the Xeon's larger shared L3 helps in cache-heavy server workloads.

Memory support is another differentiator. Both support DDR5, but the Xeon adds ECC memory support, which is critical for server reliability. The Xeon also offers far more PCIe lanes: 80 Gen 5 lanes versus 20 on the Core Ultra, making it suitable for high-bandwidth expansion in workstations. The TDP reflects this: the Xeon is rated at 150W versus 125W for the Core Ultra. Both are unlocked for overclocking, and both lack integrated graphics.

The release dates are also notable. The Core Ultra 5 245KF launched on 2024-10-23, while the Xeon 634 is dated 2026-02-01. This newer release for the Xeon does not help it overcome the Core Ultra's architectural efficiency, but it does indicate the Xeon is a current-generation product for its segment.

FAQ

Q: Which processor has a higher boost clock?

A: The Intel Core Ultra 5 245KF has a boost clock of 5.20 GHz, while the Intel Xeon 634 boosts to 4.60 GHz.

Q: Does the Xeon 634 support ECC memory?

A: Yes, the Intel Xeon 634 supports ECC memory, while the Core Ultra 5 245KF does not.

Q: What is the biggest performance difference between the two?

A: The largest gap is in Passmark find prime numbers, where the Core Ultra 5 245KF scores 416 versus the Xeon 634's 196, a 112.2% advantage. Another major gap is in floating point math, with the Core Ultra leading by 40.6%.

Q: How many PCIe lanes does each processor offer?

A: The Intel Xeon 634 offers 80 Gen 5 lanes, while the Intel Core Ultra 5 245KF offers 20 Gen 5 lanes.

Q: Which processor has more L3 cache?

A: The Intel Xeon 634 has 48 MB of shared L3 cache, while the Intel Core Ultra 5 245KF has 24 MB of shared L3 cache.

Q: In which benchmark does the Xeon 634 beat the Core Ultra 5 245KF by the largest margin?

A: The Xeon 634 wins Passmark integer math by 16%, scoring 117,664 versus the Core Ultra's 98,854.

Specification Differences

The table below highlights the key differences between the two processors based on recorded data.

| Specification | Intel Core Ultra 5 245KF | Intel Xeon 634 |

|:--- |:--- |:--- |

| Cores | 14 | 12 |

| Threads | 14 | 24 |

| Base Clock | 4.20 GHz | 2.70 GHz |

| Boost Clock | 5.20 GHz | 4.60 GHz |

| TDP | 125 W | 150 W |

| Socket | Intel Socket 1851 | Intel Socket 4710 |

| Architecture | Arrow Lake | Granite Rapids |

| Process Node | 3 nm (TSMC) | 5 nm (Intel) |

| Die Size | 243 mm² | 598 mm² |

| Transistors | 17,800 million | Not specified |

| L1 Cache | 192 KB (per core) | 112 KB (per core) |

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

| L3 Cache | 24 MB (shared) | 48 MB (shared) |

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

| Memory Bandwidth | 102.4 GB/s | 204.8 GB/s |

| ECC Memory | No | Yes |

| PCIe Lanes | Gen 5, 20 Lanes | Gen 5, 80 Lanes |

| Market Segment | Desktop | Server/Workstation |

| Release Date | 2024-10-23 | 2026-02-01 |

| Launch MSRP | $294 | $499 |

| Part Number | SRQCY | SA2DL |