Intel Core Ultra 5 245KF vs Intel Xeon Platinum 8260M Comparison

Where Each One Wins

The benchmark split between the Intel Xeon Platinum 8260M and the Intel Core Ultra 5 245KF is unusually clear, with the data revealing two distinct performance personalities. The Xeon Platinum 8260M takes only 3 of 17 head-to-head tests, but those wins are concentrated in workloads where raw parallel throughput across many threads matters more than per-core speed. The Core Ultra 5 245KF dominates with 14 wins, particularly in single-threaded and latency-sensitive tasks, where its higher clock speeds and newer architecture provide a decisive edge.

Looking at the workload categories, the Xeon's victories are in data compression (573896 vs 460123, a 24.7% advantage), integer math (129213 vs 98854, a 30.7% advantage), and random string sorting (69236 vs 55206, a 25.4% advantage). These are all throughput-oriented tasks that scale well with core count, and the Xeon's 24 cores and 48 threads provide the parallel resources needed. The Core Ultra 5 245KF, despite having fewer cores (14 vs 24) and no hyperthreading (14 threads vs 48), still manages to win the majority of tests through superior per-core efficiency and clock speed advantages.

For the Core Ultra, its wins span Cinebench both single and multi-core, PassMark single-thread, floating point math, encryption, extended instructions, prime number finding, multithread, and physics tests. The single-thread dominance is particularly stark: 4715 vs 2320, a 50.8% lead. This gap reflects the architectural generation difference, with the Arrow Lake design delivering substantially better instructions per clock. The Core Ultra also wins in multithread tests (43110 vs 34592, a 19.8% lead), which is notable because it achieves this with fewer cores, indicating that its per-core throughput advantage is large enough to overcome the Xeon's core count advantage.

FAQ

Q: Which processor has the higher boost clock speed?

A: The Intel Core Ultra 5 245KF has a boost clock of 5.20 GHz compared to the Intel Xeon Platinum 8260M's 3.90 GHz. This 1.3 GHz difference directly contributes to the Core Ultra's significant single-thread performance advantage.

Q: How do the core and thread counts compare?

A: The Xeon Platinum 8260M offers 24 cores and 48 threads, while the Core Ultra 5 245KF provides 14 cores and 14 threads. The Xeon has both more physical cores and hyperthreading support, giving it a 34-thread advantage in raw thread count.

Q: What is the process node difference between these two CPUs?

A: The Xeon Platinum 8260M uses Intel's 14 nm process with 8,000 million transistors, while the Core Ultra 5 245KF uses a 3 nm process from TSMC with 17,800 million transistors. The smaller node allows for significantly higher transistor density and efficiency.

Q: Do both processors support ECC memory?

A: No. The Xeon Platinum 8260M supports ECC memory, reflecting its server/workstation positioning, while the Core Ultra 5 245KF does not support ECC, consistent with its desktop market segment.

Q: Which CPU has the larger L3 cache?

A: The Xeon Platinum 8260M has 35.75 MB of shared L3 cache, while the Core Ultra 5 245KF has 24 MB of shared L3 cache. The Xeon's larger L3 cache helps in its winning workloads like data compression and integer math.

Q: What are the respective release dates?

A: The Xeon Platinum 8260M was released on December 10, 2018, while the Core Ultra 5 245KF was released on October 23, 2024. The nearly six-year gap explains the significant architectural differences.

Head-to-Head Benchmarks

The Cinebench results show a consistent pattern: the Core Ultra 5 245KF wins every Cinebench test, and the margin is identical across all of them at 19.8%. In Cinebench R23, the Core Ultra scores 36647 versus the Xeon's 29403 in multi-core, and 5173 versus 4151 in single-core. This consistency suggests the Core Ultra's architectural efficiency provides a uniform advantage across different workload intensities.

The single-thread test from PassMark reveals the largest disparity: 4715 for the Core Ultra versus 2320 for the Xeon, a 50.8% difference. This is the most dramatic gap in the entire benchmark suite, and it underscores how far per-core performance has advanced. The boost clock difference (5.20 GHz vs 3.90 GHz) combined with the newer architecture explains this outcome.

The Xeon's strongest showing is in integer math, where it scores 129213 versus the Core Ultra's 98854, a 30.7% advantage. This is followed by random string sorting (69236 vs 55206, a 25.4% lead) and data compression (573896 vs 460123, a 24.7% lead). These wins suggest that workloads with high thread counts and memory access patterns benefit from the Xeon's 48 threads, even though each individual thread is slower.

In data encryption, the Core Ultra wins decisively: 33381 versus 17625, a 47.2% advantage. This is notable because encryption workloads often benefit from newer instruction set extensions, which the Arrow Lake architecture provides. Similarly, floating point math shows a 44.1% Core Ultra advantage (131546 vs 73514), further highlighting the architectural efficiency gains. Prime number finding shows a 66.1% Core Ultra lead (416 vs 141), which is another indicator of per-core integer throughput improvements.

Specification Differences

The two processors differ across nearly every specification category. The Xeon Platinum 8260M has 24 cores and 48 threads, while the Core Ultra 5 245KF has 14 cores and 14 threads. Base clocks are 2.40 GHz for the Xeon versus 4.20 GHz for the Core Ultra, and boost clocks are 3.90 GHz versus 5.20 GHz. Thermal design power differs as well: 165 watts for the Xeon versus 125 watts for the Core Ultra.

The memory support is fundamentally different: the Xeon uses DDR4, while the Core Ultra uses DDR5. The Core Ultra has a dual-channel memory bus with 102.4 GB/s bandwidth, while the Xeon's memory bus and bandwidth are not specified. ECC support is present on the Xeon but absent on the Core Ultra.

The sockets are incompatible: Intel Socket 3647 for the Xeon versus Intel Socket 1851 for the Core Ultra. The Xeon has no integrated graphics, and the Core Ultra's integrated graphics are listed as "N/A". The Core Ultra supports PCIe Gen 5 with 20 lanes from the CPU, while the Xeon's PCIe support is not specified.

The Xeon's multiplier is locked, while the Core Ultra's multiplier is unlocked, allowing overclocking. Market segments differ as well: the Xeon is positioned for server/workstation use, while the Core Ultra is for desktop. The Core Ultra has a launch MSRP of $294, while the Xeon has no launch MSRP listed.

Architecture Differences

The architectural gap between these two CPUs spans multiple generations. The Xeon Platinum 8260M is based on Cascade Lake architecture, specifically Cascade Lake-SP, built on Intel's 14 nm process with 8,000 million transistors. The Core Ultra 5 245KF uses Arrow Lake architecture (Arrow Lake-S), built on TSMC's 3 nm process with 17,800 million transistors. This process shrink from 14 nm to 3 nm is a primary driver of the performance differences.

Cache structures also differ significantly. The Xeon has 64 KB of L1 per core, 1 MB of L2 per core, and 35.75 MB of shared L3 cache. The Core Ultra has 192 KB of L1 per core, 3 MB of L2 per core, and 24 MB of shared L3 cache. The Core Ultra's larger per-core L1 and L2 caches support its higher single-thread performance, while the Xeon's larger shared L3 cache helps in its multithreaded wins.

The Core Ultra's transistor count of 17,800 million is more than double the Xeon's 8,000 million, despite the Core Ultra having fewer cores. This reflects both the denser 3 nm process and the integration of newer architectural features. The Core Ultra's die size is 243 mm², while the Xeon's die size is not specified.

The release date difference (December 2018 versus October 2024) spans nearly six years of architectural evolution. The Core Ultra's Arrow Lake design incorporates the lessons learned across multiple generations, resulting in substantially better instructions per clock. The Xeon's Cascade Lake design, while respectable for its time, cannot match the per-core efficiency of the newer architecture.

The Verdict

The data presents a clear picture: the Intel Core Ultra 5 245KF is the faster processor in the vast majority of measured workloads, winning 14 of 17 head-to-head benchmarks. Its advantages in single-thread performance (50.8% in PassMark single-thread), floating point math (44.1%), and encryption (47.2%) are substantial and consistent across diverse test types. The Core Ultra's higher clock speeds (5.20 GHz boost versus 3.90 GHz) and newer 3 nm architecture provide a fundamental per-core efficiency advantage that more than compensates for its fewer cores.

However, the Intel Xeon Platinum 8260M retains relevance in specific server-oriented workloads. Its wins in data compression (24.7% ahead), integer math (30.7% ahead), and random string sorting (25.4% ahead) demonstrate that certain parallel workloads still benefit from its 48 threads. The Xeon's ECC memory support and server/workstation market positioning make it appropriate for environments requiring data integrity and high thread counts, even if its overall performance is lower.

For desktop users prioritizing speed across common applications, gaming, and general productivity, the Core Ultra 5 245KF is clearly the stronger choice. Its single-thread dominance and multithread advantage (19.8% in Cinebench R23 multi-core) mean it delivers better performance almost everywhere. The unlocked multiplier also allows for further performance tuning.

For server administrators running heavily threaded, memory-intensive workloads like data compression and integer processing, the Xeon Platinum 8260M's specific strengths and ECC support provide a rationale for its continued use. Its 92nd percentile ranking versus the Core Ultra's 91st percentile shows they are close in overall standing, but the distribution of wins reveals very different optimal use cases. The recorded data suggests the Core Ultra is the better all-round performer, while the Xeon occupies a narrower but still valid niche.