Intel Xeon 636 vs Intel Xeon Platinum 8260M Comparison

Head-to-Head Benchmarks

The benchmark data presents a decisive picture. The Intel Xeon 636 wins 15 of the 17 head-to-head comparisons, while the Intel Xeon Platinum 8260M takes only 2. The margins, however, are not uniform, and the nature of each victory reveals distinct performance characteristics.

The most significant losses for the Platinum 8260M come in single-threaded and physics-based workloads. In PassMark single-thread testing, the Xeon 636 scores 3937 against 2320 for the Platinum 8260M, a delta of -41.1%. The physics test shows an even starker gap: 3645 versus 2080, a -42.9% difference. These are large, consistent advantages for the newer processor.

Cinebench results follow the same pattern. Across all three versions of the Cinebench suite, the Xeon 636 leads by roughly 22% in both multi-core and single-core tests. In Cinebench R23 multi-core, the Xeon 636 records 37757 versus 29403 for the Platinum 8260M (-22.1%). Single-core R23 shows 5330 against 4151, also -22.1%. The consistency of this margin across R15, R20, and R23 suggests a fundamental architectural advantage rather than workload-specific tuning.

The Xeon 636 also dominates in floating-point math, scoring 107826 against 73514, a -31.8% gap. Prime number finding shows a -44.7% delta (255 versus 141), and data encryption shows -35.2% (27193 versus 17625). Extended instruction performance favors the Xeon 636 by -17.9% (43282 versus 35529). Integer math is closer, with the Xeon 636 ahead by only -6.6% (138281 versus 129213).

The Platinum 8260M does claim two wins, and both are notable. In data compression, it scores 573896 against 550395, a 4.3% advantage. The bigger win comes in random string sorting, where it records 69236 versus 54420, a substantial 27.2% lead. These two workloads appear to benefit from the Platinum 8260M's higher core count and larger shared cache structure.

Where Each One Wins

The Xeon 636 is the clear choice for compute-heavy, latency-sensitive tasks. Its wins in physics simulation, floating-point math, encryption, and prime number calculations point to strong per-core throughput and efficient instruction execution. Single-threaded performance is particularly dominant, with a 41.1% lead in PassMark single-thread and 22.1% in Cinebench single-core. This makes it suitable for workloads that cannot fully utilize many cores, such as database transactions or legacy application threads.

The Xeon 636 also wins in multi-threaded synthetic tests despite having only 12 cores versus 24. The PassMark multithread score of 44421 versus 34592 (-22.1%) shows that its 12 cores with higher clock speeds and newer architecture outperform double the core count from the older generation. Cinebench multi-core results reinforce this: the Xeon 636 leads by 22.1% across R15, R20, and R23.

The Platinum 8260M wins where memory bandwidth and cache capacity matter more than raw compute speed. Its 4.3% advantage in data compression and 27.2% lead in random string sorting suggest workloads that involve large datasets and unpredictable access patterns. The 35.75 MB shared L3 cache and 24 cores provide an advantage in these specific scenarios, even though the processor is older and runs on a different socket.

For mixed workloads, the Xeon 636 offers better all-around performance. Its average benchmark score of 61360 versus 58323 for the Platinum 8260M places it higher in the database, and both processors sit at the 92nd percentile among all CPUs. The Xeon 636's nearest rivals include the Intel Core i9-13900K and i9-13900KF, with deltas of -0.7% and -0.8% respectively, indicating it performs near flagship desktop parts.

Architecture Differences

The two processors come from entirely different design eras. The Intel Xeon Platinum 8260M uses the Cascade Lake architecture on a 14 nm process with 8,000 million transistors. It features 24 cores and 48 threads, with base and boost clocks of 2.40 GHz and 3.90 GHz. Its cache hierarchy includes 64 KB L1 per core, 1 MB L2 per core, and 35.75 MB shared L3. It supports DDR4 memory and uses the Intel Socket 3647.

The Intel Xeon 636 is built on Granite Rapids architecture with a 5 nm process. It has 12 cores and 24 threads, with base and boost clocks of 3.50 GHz and 4.70 GHz. Its L1 cache is 112 KB per core, L2 is 2 MB per core, and L3 is 48 MB shared. It supports DDR5 memory with a quad-channel bus and 204.8 GB/s bandwidth. It uses the Intel Socket 4710 and offers PCIe Gen 5 with 80 lanes (CPU only). The die size is 598 mm².

The clock speed difference is significant: the Xeon 636 boosts to 4.70 GHz versus 3.90 GHz for the Platinum 8260M, a raw 0.80 GHz advantage. Even the base clock of 3.50 GHz on the Xeon 636 exceeds the boost clock of the Platinum 8260M. This explains much of the single-thread and physics performance gap.

The TDP figures are close: 170 W for the Xeon 636 and 165 W for the Platinum 8260M. Both support ECC memory. The Xeon 636 has an unlocked multiplier, while the Platinum 8260M does not. The release dates differ considerably, with the Platinum 8260M launching in December 2018 and the Xeon 636 in February 2026. The Xeon 636 has a launch MSRP of $639.

The memory architecture also differs. The Xeon 636's DDR5 support with quad-channel configuration and 204.8 GB/s bandwidth is a generation ahead of the Platinum 8260M's DDR4 support. This likely contributes to the Xeon 636's wins in memory-intensive tasks like encryption, though the Platinum 8260M still manages to win in random string sorting.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon Platinum 8260M has 24 cores and 48 threads. The Intel Xeon 636 has 12 cores and 24 threads.

Q: Why does the Xeon 636 win in multi-core benchmarks despite having half the cores?

A: The Xeon 636 has higher clock speeds (3.50 GHz base, 4.70 GHz boost versus 2.40 GHz and 3.90 GHz) and a newer architecture on a 5 nm process. Its Cinebench R23 multi-core score of 37757 exceeds the Platinum 8260M's 29403 by 22.1%.

Q: In which workloads does the Platinum 8260M outperform the Xeon 636?

A: The Platinum 8260M wins in data compression by 4.3% (573896 versus 550395) and in random string sorting by 27.2% (69236 versus 54420).

Q: What is the single-thread performance difference?

A: The Xeon 636 scores 3937 in PassMark single-thread versus 2320 for the Platinum 8260M, a 41.1% advantage. In Cinebench R23 single-core, the gap is 22.1% (5330 versus 4151).

Q: Do both processors support ECC memory?

A: Yes, both the Intel Xeon Platinum 8260M and the Intel Xeon 636 support ECC memory.

Q: How do these processors compare to their nearest rivals in the database?

A: The Platinum 8260M sits near the AMD Ryzen 7 9850X3D (-0.1%), Intel Xeon w5-2545 (-0.3%), Intel Core i9-14900 (+0.4%), and AMD Ryzen AI 9 HX 470 (-0.9%). The Xeon 636 sits near the Intel Core i9-13900T (-0.6%), i9-13900K (-0.7%), Core Ultra 7 270HX Plus (-0.8%), and i9-13900KF (-0.8%).

The Verdict

The data directs different users to different processors. For most workloads, the Intel Xeon 636 is the superior choice. Its wins in 15 of 17 benchmarks, including all Cinebench tests, single-thread performance, physics, encryption, and floating-point math, make it the more versatile processor. The 22.1% lead in Cinebench multi-core across all three versions shows that its 12 cores deliver more usable throughput than the Platinum 8260M's 24 cores.

The Platinum 8260M remains relevant only for specific workloads. Its 27.2% lead in random string sorting and 4.3% lead in data compression indicate that applications with large cache requirements and irregular memory access patterns may still benefit from its 24 cores and 35.75 MB L3 cache. These are niche advantages in a benchmark suite dominated by the Xeon 636.

The Xeon 636's higher average benchmark score (61360 versus 58323) and its proximity to high-end Core i9 parts in the nearest rival list reinforce its position as the stronger all-round performer. The Platinum 8260M, while still a capable 24-core processor, belongs to an older generation and cannot match the per-core efficiency and clock speed of the newer Xeon 636. For new deployments, the Xeon 636 is the data-backed recommendation. The Platinum 8260M should only be considered when its specific cache-sensitive workload advantages are the primary requirement.