Intel Xeon Platinum 8260M

The Intel Xeon Platinum 8260M is a 24-core, 48-thread Cascade Lake-SP processor designed for the server and workstation segment. Its aggregate benchmark average of 58,323 places it in the 94th percentile of all CPUs, indicating strong overall performance that remains competitive against modern processors.

Benchmark Performance

The Xeon Platinum 8260M delivers a robust multi-core showing, with Cinebench R23 multi-core scoring 29,403 points. This result is complemented by a Cinebench R20 multi-core score of 12,349 and a Cinebench R15 multi-core score of 2,963. In PassMark's multithread test, the processor achieves 34,592 points, while integer math hits 129,213 and floating-point math reaches 73,514. The data indicates a clear strength in parallel workloads, with the multi-core scores outpacing its single-thread results by a significant margin.

In single-thread performance, the processor scores 4,151 in Cinebench R23 single-core, 1,743 in Cinebench R20 single-core, and 418 in Cinebench R15 single-core. PassMark single-thread performance is 2,320. These figures show that while the chip is capable in lightly-threaded tasks, its architecture prioritizes throughput over raw per-core speed. Compared to its nearest rivals, the processor trails the AMD Ryzen AI Max PRO 390 and Intel Core i9-14900HX by 0.1% in average benchmark score, but leads the AMD EPYC 7313 by 1.6% and the AMD Ryzen AI Max 390 by 2.1%.

The PassMark data reveals specific workload characteristics. Data compression scores 573,896, which is exceptionally high and suggests strong cache and memory subsystem efficiency. Data encryption scores 17,625, while extended instructions (SIMD) score 35,529. Physics calculations score 2,080, and random string sorting scores 69,236. The find prime numbers test is notably low at 141, indicating that the architecture is not optimized for this specific type of integer workload.

Platform and Compatibility

The processor uses the Intel Socket 3647 platform, which is a server-grade socket designed for dual-socket or single-socket configurations. It is built on the Cascade Lake-SP architecture, manufactured on Intel's 14 nm process node with 8,000 million transistors. The platform supports DDR4 memory with ECC (Error-Correcting Code) memory enabled, which is essential for data integrity in server and workstation environments.

Memory configuration includes a shared L3 cache of 35.75 MB, with 64 KB L1 cache per core and 1 MB L2 cache per core. The cache hierarchy is designed to feed the 24 cores efficiently, though the shared L3 is relatively modest for a processor of this class. The socket is shared with other Cascade Lake-SP Xeon processors, meaning the platform offers a clear upgrade path within the same generation, though the 8260M is positioned near the upper end of that stack.

The processor is not multiplier-unlocked, so overclocking is not supported. This is typical for server-class Xeon parts, where stability and power predictability are prioritized over enthusiast tuning. The part number is SRF9JCD8069504201201, and the processor was released on December 10, 2018. The platform does not include integrated graphics, requiring a discrete GPU for display output, which is standard for server/workstation segments.

Single-Thread vs Multi-Thread Behavior

The split between single-thread and multi-thread performance is stark. In Cinebench R23, the multi-core score of 29,403 is roughly 7.1 times the single-core score of 4,151. This scaling is below the theoretical 24-core maximum, indicating that the processor does not achieve perfect linear scaling due to shared resources like L3 cache and memory bandwidth. However, the scaling is strong enough to suggest that most multi-threaded applications will see substantial gains.

For real workloads, this means the processor excels in tasks like video rendering, 3D simulation, and data analysis where all cores are utilized. In contrast, lightly-threaded tasks such as legacy single-threaded applications or basic office work will not benefit from the full core count and will rely on the 3.90 GHz boost clock. The base clock of 2.40 GHz is relatively low, which helps manage the 165 W TDP under full load.

The PassMark data reinforces this split. The multithread score of 34,592 is nearly 15 times the single-thread score of 2,320, showing that the processor's value is firmly in parallel processing. Data compression at 573,896 and integer math at 129,213 are standout results, while the single-thread score is moderate. This behavior indicates that the 8260M is best suited for server virtualization, scientific computing, and heavy batch processing rather than interactive or latency-sensitive workloads.

How It Compares

AMD Ryzen AI Max PRO 390: The Xeon Platinum 8260M trails this rival by 0.1% in average benchmark score. This is a negligible difference, meaning the two processors are effectively tied in overall performance. However, the Ryzen AI Max PRO 390 likely achieves this with a different core configuration and power profile, but the data shows they land in the same performance tier.

Intel Core i9-14900HX: The 8260M is 0.1% behind the Core i9-14900HX in average score. This is remarkable because the i9-14900HX is a mobile processor, while the Xeon is a server part. The performance parity suggests that the Xeon's higher core count compensates for the i9's higher clock speeds in the aggregate benchmark suite.

AMD EPYC 7313: The Xeon Platinum 8260M leads the EPYC 7313 by 1.6% in average score. This is a modest but consistent advantage, showing that the older Cascade Lake architecture can still hold its own against a newer EPYC part. The lead is likely driven by the Xeon's higher boost clock and efficient cache design in the tested benchmarks.

AMD Ryzen AI Max 390: The 8260M is 2.1% ahead of the Ryzen AI Max 390 in average score. This is the largest delta among the nearest rivals, indicating that the Xeon has a clear, if not overwhelming, performance edge. The gap is significant enough to matter in prolonged multi-threaded workloads but not so large as to make the rival uncompetitive.

Power and Thermals

The processor has a TDP of 165 W, which classifies it as a high-power server chip. This TDP figure implies the need for a substantial cooling solution, typically a high-end air cooler or a liquid cooler, to maintain sustained boost clocks under load. The 14 nm process node means the processor is not as power-efficient as newer 5 nm or 7 nm parts, but the 165 W envelope is manageable for server chassis with adequate airflow.

The base clock of 2.40 GHz is set conservatively to stay within the TDP limit, while the 3.90 GHz boost clock is available for single-threaded bursts. In practice, the processor will spend most of its time between these clocks depending on the workload. The lack of an unlocked multiplier means users cannot adjust power limits via overclocking, but the stock configuration is designed to deliver consistent performance in a server environment.

Cooling requirements are dictated by the socket and TDP. The Intel Socket 3647 platform typically uses active heatsinks or large passive heatsinks with server fans. Given the 165 W TDP, a capable air cooler with a large fin array is sufficient for most rack-mount or tower server configurations. The data does not include specific thermal measurements, but the TDP class is clear: this is not a low-power part and should be paired with robust cooling infrastructure.

FAQ

Q: How many cores and threads does the Intel Xeon Platinum 8260M have?

A: It has 24 cores and 48 threads.

Q: What is the boost clock speed?

A: The boost clock is 3.90 GHz, while the base clock is 2.40 GHz.

Q: Does it support ECC memory?

A: Yes, ECC memory is supported with DDR4 memory.

Q: What is the processor's percentile ranking among all CPUs?

A: It ranks in the 94th percentile, indicating it outperforms 94% of all CPUs in the benchmark database.

Q: What socket does the processor use?

A: It uses Intel Socket 3647.

Q: What is the L3 cache size?

A: The shared L3 cache is 35.75 MB.

Who Should Consider It

The Xeon Platinum 8260M is best suited for workloads that leverage its 24 cores and 48 threads. For content creators, the Cinebench R23 multi-core score of 29,403 indicates strong performance in video rendering and 3D animation tasks. The PassMark floating-point math score of 73,514 and integer math score of 129,213 further support scientific computing and engineering simulations.

For server administrators, the processor's data encryption score of 17,625 and data compression score of 573,896 make it suitable for database workloads and file server applications. The ECC memory support and server-grade platform ensure reliability for always-on environments. The 94th percentile ranking shows that despite being a 2018 release, it remains competitive with modern processors in aggregate performance.

For office and general productivity, the single-thread score of 2,320 in PassMark is modest, meaning the processor is not ideal for tasks that rely heavily on single-core performance, such as basic spreadsheet use or web browsing. However, for batch processing, virtualization, or any workload that can utilize all cores, the 8260M delivers strong performance that rivals newer parts within a few percent. The 1.6% lead over the AMD EPYC 7313 and 2.1% lead over the AMD Ryzen AI Max 390 demonstrate that this Xeon still holds its ground in its intended segment.