Intel Xeon Gold 6338T vs Intel Xeon Platinum 8260M Comparison

Head-to-Head Benchmarks

The benchmark data presents a clear overall winner in the Intel Xeon Gold 6338T, which takes 13 of the 17 head-to-head comparisons. However, the margin of victory varies dramatically depending on the workload, and the Platinum 8260M holds onto a few specialized wins that are worth examining closely.

In the Cinebench suite, the Gold 6338T is consistently ahead by a narrow but uniform margin. Across Cinebench R15, R20, and R23, the multicore delta is exactly 3.5% in every case: 3067 versus 2963 in R15 multicore, 12780 versus 12349 in R20 multicore, and 30430 versus 29403 in R23 multicore. The single-core results tell the same story, with the Gold 6338T winning R15 single-core by 3.3% (432 versus 418) and R20 and R23 single-core by 3.5% each (1804 versus 1743 and 4296 versus 4151 respectively). This uniformity suggests a consistent architectural efficiency advantage rather than a workload-specific quirk.

The Passmark multithread test follows the same pattern, with the Gold 6338T scoring 35801 against the Platinum 8260M's 34592, another 3.5% gap. The single-thread Passmark results are closer, with the Gold 6338T ahead by just 1.2% (2348 versus 2320).

The most striking victory for the Gold 6338T comes in data encryption, where it scores 24677 against 17625, a massive 40% advantage. This is the largest delta in the entire comparison and points to a significant difference in cryptographic instruction handling between the two architectures. Extended instructions also favor the Gold 6338T heavily, with a 21.8% lead (43292 versus 35529). Floating-point math shows a 23.2% gap (90584 versus 73514), and integer math lands at 17.8% (152275 versus 129213).

The Platinum 8260M's four wins are concentrated in specific areas. Its largest margin comes in the Passmark physics test, where it scores 2080 against the Gold 6338T's 1160, a 44.2% advantage. This is a substantial reversal and indicates that the older architecture handles the physics simulation workload far better. The Platinum also wins data compression with 573896 versus 557816, a 2.8% edge, and random string sorting with 69236 versus 66495, a 4% margin. The find prime numbers test goes to the Platinum as well, 141 versus 118, a 16.3% lead.

Where Each One Wins

The Gold 6338T is the clear choice for compute-heavy enterprise workloads. Its 40% lead in data encryption makes it particularly well suited for security-focused applications, database encryption, and VPN or TLS termination duties. The 23.2% floating-point advantage suggests strong performance in scientific computing, financial modeling, and any workload that relies heavily on FPU throughput. The 21.8% extended instructions win reinforces this, indicating better support for modern SIMD and specialized instruction sets that accelerate media processing, AI inference, and scientific code.

The 17.8% integer math advantage matters for general server work, compilation, and data processing tasks. The consistent 3.5% wins across all Cinebench versions and the Passmark multithread test show that the Gold 6338T is simply the faster processor for most general-purpose multithreaded workloads, including rendering and content creation.

The Platinum 8260M, despite being the older design, has its own niche. The 44.2% physics win is the headline: this processor handles physics simulation dramatically better, which could matter for certain engineering simulation packages, game server physics, or scientific workloads that rely on rigid body dynamics. The data compression win, while modest at 2.8%, suggests the Platinum has a slight edge in compression and archival workloads. Random string sorting at 4% ahead indicates it handles certain data structure manipulation tasks more efficiently. The 16.3% find prime numbers advantage points to better performance in number-crunching tasks that involve heavy integer division and primality testing, common in cryptography research and some mathematical computing.

Architecture Differences

The two processors come from different Intel server generations and manufacturing nodes. The Gold 6338T is built on Ice Lake-SP architecture using Intel's 10 nm process, while the Platinum 8260M uses the older Cascade Lake-SP design on a 14 nm node. This node difference likely explains much of the Gold's efficiency advantage in encryption, floating-point, and integer workloads, as the newer process allows for improved transistor characteristics and lower power per operation.

Both processors feature 24 cores and 48 threads, so thread count is not a differentiating factor. The Gold 6338T runs at a base clock of 2.10 GHz with a boost clock of 3.40 GHz, while the Platinum 8260M has a higher base of 2.40 GHz and a higher boost of 3.90 GHz. Despite the Platinum's clock advantage, the Gold still wins most benchmarks, which points to the architectural improvements in Ice Lake outweighing the raw frequency deficit. Both processors carry a 165 W TDP.

Cache configurations are similar but not identical. Both have 64 KB of L1 cache per core and 1 MB of L2 cache per core. The L3 cache differs slightly: the Gold 6338T has 36 MB shared, while the Platinum 8260M has 35.75 MB shared. This tiny 0.25 MB difference is unlikely to be a major factor in performance.

The memory subsystems differ in documentation. The Gold 6338T supports eight-channel DDR4 memory with a rated bandwidth of 204.8 GB/s. The Platinum 8260M supports DDR4 and ECC memory, but the database does not record its channel count or bandwidth figures. Both support ECC memory, which is expected for server platforms. The Gold 6338T uses the Intel Socket 4189 platform and offers PCIe Gen 4 with 64 lanes (CPU only). The Platinum 8260M uses the older Intel Socket 3647, and its PCIe specifications are not recorded in the database.

The transistor count for the Platinum 8260M is recorded at 8,000 million, while the Gold 6338T's transistor count is not listed. The production status for the Gold 6338T is listed as Active, while the Platinum 8260M's production status is not recorded. The release dates show the generational gap: the Gold 6338T launched on April 5, 2021, while the Platinum 8260M launched on December 10, 2018.

The Verdict

The data points to the Intel Xeon Gold 6338T as the better processor for the majority of server and workstation tasks. It wins 13 of 17 benchmarks, including every Cinebench test, all the math-heavy Passmark tests, and the multithread and single-thread overall metrics. The 40% encryption advantage and 23.2% floating-point lead are decisive for modern data center workloads, and the consistent 3.5% multicore advantage across rendering benchmarks makes it the safer pick for general compute.

The Platinum 8260M is not without merit. Its 44.2% physics win is the single largest margin in the entire comparison, and it holds advantages in compression, string sorting, and prime number finding. Organizations running physics-heavy simulation workloads or compression pipelines might prefer the Platinum despite its age. Its higher base and boost clocks (2.40 GHz and 3.90 GHz versus 2.10 GHz and 3.40 GHz) may also help in latency-sensitive single-threaded scenarios that are not fully captured by the benchmark suite.

The Gold 6338T's newer 10 nm Ice Lake architecture versus the Platinum's 14 nm Cascade Lake design explains most of the performance gap. The Gold achieves better results in nearly every category despite lower clock speeds, which speaks to the efficiency of the newer core design. The Gold also offers PCIe Gen 4 with 64 lanes and a documented 204.8 GB/s memory bandwidth, making it the more future-proof platform for high-throughput systems.

For most buyers, the Gold 6338T is the logical choice. It is faster in the workloads that dominate modern server usage: encryption, floating-point math, integer math, and general multithreaded compute. The Platinum 8260M should be reserved for specialized deployments where its physics and compression advantages are directly applicable, or where the existing Socket 3647 platform infrastructure makes the older chip the practical upgrade path.

FAQ

Q: Which processor is faster in Cinebench multicore tests?

A: The Intel Xeon Gold 6338T wins all three Cinebench multicore tests by 3.5%: 3067 versus 2963 in R15, 12780 versus 12349 in R20, and 30430 versus 29403 in R23.

Q: How large is the encryption performance gap between the two?

A: The Gold 6338T scores 24677 in Passmark data encryption against the Platinum 8260M's 17625, a 40% advantage for the Gold.

Q: Does the Platinum 8260M win any benchmarks?

A: Yes, the Platinum 8260M wins four tests: physics with a 44.2% margin (2080 versus 1160), data compression by 2.8% (573896 versus 557816), random string sorting by 4% (69236 versus 66495), and find prime numbers by 16.3% (141 versus 118).

Q: What are the core and thread counts for both processors?

A: Both the Intel Xeon Gold 6338T and the Intel Xeon Platinum 8260M have 24 cores and 48 threads.

Q: How do the clock speeds compare?

A: The Platinum 8260M has a higher base clock at 2.40 GHz and a higher boost clock at 3.90 GHz, while the Gold 6338T runs at 2.10 GHz base and 3.40 GHz boost.

Q: What process nodes are used by each processor?

A: The Gold 6338T uses Intel's 10 nm process with Ice Lake-SP architecture, while the Platinum 8260M uses the 14 nm process with Cascade Lake-SP architecture.