Intel Core Ultra 5 245KF vs Intel Xeon 6505P Comparison

The Intel Core Ultra 5 245KF and the Intel Xeon 6505P occupy opposite ends of the processor spectrum, yet their benchmark data reveals a surprisingly competitive overlap. The Core Ultra 5 245KF, a desktop part built on a 3 nm TSMC process, wins 15 of the 17 head-to-head comparisons. The Xeon 6505P, a server/workstation chip on Intel’s 5 nm node, takes only 2 wins, but those victories occur in workloads that matter for specific professional tasks. The data shows a clear split: the desktop chip dominates general compute, single-threaded tasks, and floating-point math, while the Xeon pulls ahead in integer math and data compression.

The Verdict

The benchmark results point to the Intel Core Ultra 5 245KF as the superior choice for most users, regardless of workload. Its average benchmark score of 55093 sits above the Xeon 6505P’s 53701, and it holds a 12.1% lead across all Cinebench multi-core tests. The desktop chip also crushes the Xeon in single-threaded performance, with a 47.9% advantage in PassMark’s single-thread test. For anyone running typical desktop applications, content creation, or gaming, the Core Ultra 5 245KF is the obvious pick.

The Xeon 6505P, however, is not without its merits. It wins data compression by 4.2% and integer math by 17.9%, and it offers eight-channel DDR5 memory with 409.6 GB/s of bandwidth versus the Core Ultra’s dual-channel 102.4 GB/s. The Xeon also supports ECC memory, a feature absent on the desktop chip. For server workloads that prioritize memory throughput, data integrity, and integer-heavy calculations, the Xeon 6505P justifies its existence.

The verdict hinges on use case. Desktop users, enthusiasts, and gamers should choose the Core Ultra 5 245KF. Server administrators and workstation operators dealing with large datasets, compression tasks, or memory-bandwidth-sensitive applications should consider the Xeon 6505P, despite its lower raw compute scores.

Architecture Differences

The two processors come from entirely different design philosophies. The Intel Core Ultra 5 245KF uses the Arrow Lake architecture, specifically Arrow Lake-S, built on a 3 nm process at TSMC. It houses 14 cores and 14 threads, meaning it has no hyperthreading. The Xeon 6505P, by contrast, uses the Granite Rapids architecture, built on Intel’s 5 nm process. It has 12 cores but 24 threads, indicating simultaneous multithreading is enabled.

Cache configurations differ substantially. The Core Ultra 5 245KF carries 192 KB of L1 cache per core, 3 MB of L2 per core, and 24 MB of shared L3 cache. The Xeon 6505P has 112 KB of L1 per core, 2 MB of L2 per core, but a much larger 48 MB of shared L3 cache. This gives the Xeon double the L3 capacity, which helps in certain server workloads.

Memory architecture represents the largest gap. The Core Ultra 5 245KF supports dual-channel DDR5 with 102.4 GB/s of bandwidth. The Xeon 6505P supports eight-channel DDR5 with 409.6 GB/s of bandwidth, a fourfold increase. The Xeon also supports ECC memory, while the Core Ultra does not. PCIe connectivity differs as well: the Core Ultra offers Gen 5 with 20 lanes, while the Xeon provides Gen 5 with 88 lanes.

Process node and foundry also separate them. The Core Ultra 5 245KF is manufactured by TSMC at 3 nm, with 17,800 million transistors on a 243 mm² die. The Xeon 6505P is fabricated by Intel at 5 nm, with no transistor or die size data available. The Core Ultra has an unlocked multiplier, while the Xeon is locked. Both lack integrated graphics.

Head-to-Head Benchmarks

The Core Ultra 5 245KF wins decisively across the Cinebench suite. In Cinebench R15 multi-core, it scores 3693 against the Xeon’s 3294, a 12.1% lead. Single-core R15 shows a 12.3% advantage (521 vs. 464). R20 multi-core repeats the 12.1% margin (15391 vs. 13728), as does R23 multi-core (36647 vs. 32687). Single-core results in R20 and R23 also show 12.1% leads. This consistency suggests a fundamental clock-speed advantage: the Core Ultra boosts to 5.20 GHz versus the Xeon’s 4.10 GHz.

PassMark results tell a more nuanced story. The Core Ultra wins data encryption by 36.5% (33381 vs. 24458) and floating-point math by 41.5% (131546 vs. 92992). The single-thread test shows a massive 47.9% gap (4715 vs. 3187). Find prime numbers also favors the Core Ultra by 91.7% (416 vs. 217), though both scores are low in absolute terms. The multithread test shows a 12.1% lead (43110 vs. 38456), and physics results are nearly identical, with the Core Ultra winning by just 0.2% (2998 vs. 2991).

The Xeon 6505P’s two wins are notable. Data compression shows 480368 vs. 460123, a 4.2% margin. Integer math shows 120456 vs. 98854, a commanding 17.9% lead. Extended instructions are close, with the Core Ultra winning by only 1.1% (37912 vs. 37515). Random string sorting also favors the Core Ultra by 5.4% (55206 vs. 52372).

Specification Differences

The two processors differ in nearly every specification field. The Core Ultra 5 245KF has 14 cores and 14 threads, while the Xeon 6505P has 12 cores and 24 threads. Base clocks are 4.20 GHz versus 2.20 GHz, and boost clocks are 5.20 GHz versus 4.10 GHz. TDP is 125 W for the Core Ultra and 150 W for the Xeon.

Sockets are incompatible: the Core Ultra uses Intel Socket 1851, while the Xeon uses Intel Socket 4710. Process nodes differ (3 nm TSMC vs. 5 nm Intel), and the Core Ultra has a known transistor count of 17,800 million and die size of 243 mm², while the Xeon’s are unspecified. Cache differs across all levels, with the Xeon offering 48 MB of L3 versus the Core Ultra’s 24 MB.

Memory bus width is a major differentiator: dual-channel for the Core Ultra, eight-channel for the Xeon. Memory bandwidth is 102.4 GB/s versus 409.6 GB/s. ECC support is absent on the Core Ultra and present on the Xeon. PCIe lanes are 20 on the Core Ultra and 88 on the Xeon, both Gen 5. The Core Ultra has an unlocked multiplier; the Xeon is locked. The Core Ultra is a desktop part, while the Xeon targets server/workstation. Release dates differ: 2024-10-23 for the Core Ultra and 2025-02-23 for the Xeon.

Where Each One Wins

The Core Ultra 5 245KF wins in 15 of 17 benchmark comparisons. Its strengths lie in single-threaded performance, where it leads by 47.9%, and in floating-point math, where it leads by 41.5%. Data encryption shows a 36.5% advantage, and prime number finding shows a 91.7% advantage. All Cinebench tests, both multi-core and single-core, favor the Core Ultra by 12.1% or more. The multithread PassMark test also shows a 12.1% lead. These results indicate the Core Ultra is better for general desktop use, gaming, content creation, and any workload that benefits from high clock speeds.

The Xeon 6505P wins in two specific areas. Data compression shows a 4.2% advantage, and integer math shows a 17.9% advantage. These wins, combined with eight-channel memory and ECC support, make the Xeon a better fit for database workloads, file servers, and applications that process large amounts of integer data. The 409.6 GB/s memory bandwidth gives it a theoretical advantage in memory-bound tasks, though the benchmark data only shows wins in those two areas.

Users should pick the Core Ultra 5 245KF for interactive work, software development, and multimedia tasks. The Xeon 6505P is the choice for headless servers, virtualized environments, or workloads where data integrity and memory throughput trump raw single-thread speed.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core Ultra 5 245KF has an average benchmark score of 55093, while the Intel Xeon 6505P scores 53701. Both sit at the 91st percentile of all CPUs.

Q: How big is the single-thread performance gap?

A: The Core Ultra 5 245KF leads by 47.9% in PassMark’s single-thread test, scoring 4715 versus the Xeon’s 3187.

Q: Does the Xeon 6505P have more cores?

A: No, the Xeon has 12 cores, while the Core Ultra has 14. However, the Xeon supports 24 threads through simultaneous multithreading, while the Core Ultra has only 14 threads.

Q: What memory advantages does the Xeon offer?

A: The Xeon supports eight-channel DDR5 memory with 409.6 GB/s bandwidth, compared to the Core Ultra’s dual-channel 102.4 GB/s. The Xeon also supports ECC memory, which the Core Ultra does not.

Q: In which workloads does the Xeon 6505P outperform the Core Ultra?

A: The Xeon wins in data compression by 4.2% (480368 vs. 460123) and integer math by 17.9% (120456 vs. 98854).

Q: Which processor has a higher boost clock?

A: The Core Ultra 5 245KF boosts to 5.20 GHz, while the Xeon 6505P boosts to 4.10 GHz.