Intel Xeon 636 vs Intel Xeon Gold 6338T Comparison

Head-to-Head Benchmarks

The benchmark data presents a surprisingly lopsided contest. The Intel Xeon 636 wins 13 of the 17 head-to-head comparisons, with the Intel Xeon Gold 6338T taking only 4. The margins, however, tell a more nuanced story than the raw win count suggests.

The Xeon 636's dominance is most pronounced in single-threaded and physics workloads. In PassMark's single-thread test, the Xeon 636 scores 3937 against the Gold 6338T's 2348, a 67.7% advantage. The physics benchmark is even more lopsided: 3645 versus 1160, a staggering 214.2% delta. These are not incremental gains; they represent a generational leap in per-core efficiency.

Cinebench results reinforce this pattern. Across R15, R20, and R23, the Xeon 636 leads by nearly identical margins in both single-core and multi-core runs. The multicore deltas hover at 24.1% in every Cinebench iteration, while single-core deltas sit at 24.3% in R15 and 24.1% in the newer versions. Specifically, the Xeon 636 posts R23 scores of 37757 multicore and 5330 single-core, versus 30430 and 4296 for the Gold 6338T. The consistency of these margins suggests a fundamental architectural advantage rather than workload-specific tuning.

The Gold 6338T's wins, while fewer, are not trivial. It takes integer math with a score of 152275 against 138281, a 9.2% edge. Random string sorting goes to the Gold 6338T at 66495 versus 54420, an 18.2% advantage. Data compression is nearly a dead heat, with the Gold 6338T edging ahead 557816 to 550395, a mere 1.3% difference. Extended instructions are effectively tied at 43292 versus 43282, a delta of 0%.

The encryption test favors the Xeon 636 by 10.2%, scoring 27193 against 24677. Floating-point math also goes to the Xeon 636 at 107826 versus 90584, a 19% margin. The prime number finding test shows the Xeon 636 at 255 versus 118, a 116.1% blowout that hints at exceptional branch prediction and integer division performance.

The multithread PassMark score follows the Cinebench pattern: 44421 for the Xeon 636 versus 35801 for the Gold 6338T, another 24.1% gap. When a benchmark scales with core count and clock speed, the Xeon 636 consistently delivers roughly a quarter more throughput. When a workload favors raw core count or specific instruction patterns, the Gold 6338T can carve out wins, but those wins are narrower than the Xeon 636's dominant margins.

FAQ

Q: Which processor has the higher single-thread performance?

A: The Intel Xeon 636 wins decisively. In PassMark single-thread, it scores 3937 versus 2348 for the Gold 6338T, a 67.7% advantage. Cinebench R23 single-core shows 5330 versus 4296, a 24.1% margin.

Q: How do the multi-core scores compare?

A: The Xeon 636 leads across all multi-core tests. Cinebench R23 multicore shows 37757 versus 30430, a 24.1% delta. PassMark multithread shows 44421 versus 35801, also a 24.1% gap.

Q: Does the Gold 6338T win any benchmarks?

A: Yes, it wins 4 of 17 head-to-head tests. It leads in integer math (152275 vs 138281), random string sorting (66495 vs 54420), data compression (557816 vs 550395), and effectively ties in extended instructions (43292 vs 43282).

Q: What is the biggest performance gap between the two?

A: The largest delta is in PassMark physics, where the Xeon 636 scores 3645 versus 1160, a 214.2% advantage. The second-largest is prime number finding at 116.1% (255 vs 118).

Q: Are these processors in the same performance tier?

A: Both rank at the 92nd percentile among all CPUs. Their average benchmark scores are close: 61360 for the Xeon 636 and 60572 for the Gold 6338T. The Xeon 636's nearest rivals include the Intel Core i9-13900K at 61766 (-0.7% delta), while the Gold 6338T sits near the Intel Core i9-13900 at 60676 (-0.2% delta).

Q: How do memory bandwidth figures compare?

A: Both processors are rated at 204.8 GB/s, despite the Xeon 636 using quad-channel DDR5 and the Gold 6338T using eight-channel DDR4.

Architecture Differences

The architectural gap between these two Xeons is substantial. The Xeon 636 is built on Granite Rapids architecture using a 5 nm process, while the Gold 6338T uses Ice Lake-SP on 10 nm. This process node difference explains much of the performance delta, particularly in power efficiency and clock scaling.

The Xeon 636 features 12 cores and 24 threads, while the Gold 6338T offers double the cores at 24 cores and 48 threads. Despite having half the core count, the Xeon 636 still wins most multi-threaded benchmarks, which speaks to the per-core performance advantage of the newer architecture.

Cache configurations differ significantly. The Xeon 636 has 112 KB of L1 cache per core and 2 MB of L2 per core, with 48 MB of shared L3. The Gold 6338T has 64 KB L1 per core, 1 MB L2 per core, and 36 MB shared L3. The Xeon 636's larger per-core caches contribute to its 67.7% single-thread advantage.

The Xeon 636 operates on a 4710 socket with PCIe Gen 5 support and 80 CPU-only lanes. The Gold 6338T uses Socket 4189 with PCIe Gen 4 and 64 lanes. The Xeon 636's newer PCIe standard and additional lanes make it more future-proof for high-bandwidth peripherals.

The Xeon 636 has an unlocked multiplier, while the Gold 6338T is locked. This makes the Xeon 636 a candidate for overclocking in workstation scenarios, though TDP figures suggest limited headroom.

Clock speeds show a clear separation: the Xeon 636 runs at 3.50 GHz base and 4.70 GHz boost, compared to 2.10 GHz base and 3.40 GHz boost for the Gold 6338T. The 1.40 GHz base clock advantage and 1.30 GHz boost advantage are decisive in latency-sensitive workloads.

Specification Differences

| Specification | Intel Xeon 636 | Intel Xeon Gold 6338T |

|---|---|---|

| Cores | 12 | 24 |

| Threads | 24 | 48 |

| Base Clock | 3.50 GHz | 2.10 GHz |

| Boost Clock | 4.70 GHz | 3.40 GHz |

| TDP | 170 W | 165 W |

| Socket | Intel Socket 4710 | Intel Socket 4189 |

| Process Node | 5 nm | 10 nm |

| L1 Cache | 112 KB (per core) | 64 KB (per core) |

| L2 Cache | 2 MB (per core) | 1 MB (per core) |

| L3 Cache | 48 MB (shared) | 36 MB (shared) |

| Memory Support | DDR5 | DDR4 |

| Memory Bus | Quad-channel | Eight-channel |

| PCIe | Gen 5, 80 Lanes | Gen 4, 64 Lanes |

| Multiplier Unlocked | Yes | No |

| Launch MSRP | $639 | Not disclosed |

The TDP difference is marginal at 5 W, despite the Gold 6338T having twice the cores. This suggests the 10 nm process is remarkably efficient at low clocks, while the 5 nm process allows much higher clock speeds within a similar power envelope.

The memory channel configurations are inverted from what one might expect: the newer Xeon 636 uses quad-channel DDR5, while the older Gold 6338T uses eight-channel DDR4. Both achieve identical 204.8 GB/s bandwidth, meaning the DDR5 standard's higher per-channel throughput compensates for fewer channels.

The Xeon 636 has a launch MSRP of $639, while the Gold 6338T's launch MSRP is not disclosed in the data. Both processors support ECC memory and are classified as server/workstation parts.

Where Each One Wins

The Intel Xeon 636 wins in scenarios that reward high clock speeds, large per-core caches, and modern instruction execution. Its 24.1% lead across all Cinebench versions indicates strong performance in 3D rendering and content creation workloads. The 67.7% single-thread advantage makes it the clear choice for legacy applications that rely on one or two threads. The physics benchmark's 214.2% margin suggests exceptional performance in simulation and scientific computing that uses floating-point operations. Data encryption at 10.2% ahead makes it suitable for secure transaction processing. The prime number finding test's 116.1% advantage indicates strong integer division and branch prediction capabilities.

The Gold 6338T wins in specific throughput-oriented workloads. Its 18.2% lead in random string sorting suggests advantages in text processing and database indexing. The 9.2% integer math advantage points to strength in arithmetic-heavy applications like financial modeling. Data compression, while only 1.3% ahead, still makes it marginally better for archival and storage workloads. The extended instructions tie means both processors handle SIMD workloads equally well.

The Gold 6338T's 48 threads versus 24 threads could make it preferable for highly parallel, memory-bound workloads that can saturate eight memory channels, even if the per-thread performance is lower. The Xeon 636's lower core count but higher per-core throughput suits workloads with strict latency requirements or limited thread parallelism.

The Verdict

The data points to a clear overall winner: the Intel Xeon 636. It wins 13 of 17 head-to-head benchmarks, including every Cinebench test, every single-thread test, and most PassMark workloads. Its average benchmark score of 61360 exceeds the Gold 6338T's 60572, and both sit at the 92nd percentile of all CPUs.

The Xeon 636 is the right choice for workloads where per-core performance matters: single-threaded applications, physics simulation, floating-point math, encryption, and any software that doesn't scale perfectly across many cores. Its 24.1% multi-core advantage despite having half the core count is remarkable and suggests that most real-world applications will run faster on the Xeon 636. The unlocked multiplier adds flexibility for power users, and the newer PCIe Gen 5 support future-proofs the platform.

The Gold 6338T is the better pick for a narrower set of scenarios. Its 24 cores and 48 threads, combined with eight-channel DDR4 memory, make it suitable for workloads that scale linearly with core count and memory bandwidth. The integer math and string sorting wins indicate it handles data manipulation tasks efficiently. For applications that can utilize 48 threads and benefit from the higher memory channel count, the Gold 6338T's wins could translate to real-world advantages.

The deciding factor is workload type. If the primary applications are single-threaded or moderately threaded, the Xeon 636's 67.7% single-thread advantage makes it the obvious choice. If the workload is massively parallel and bandwidth-hungry, the Gold 6338T's core count and eight-channel memory bus could edge out the Xeon 636 despite the latter's per-core superiority. For most mixed workloads, however, the Xeon 636's consistent 24.1% lead across rendering and general compute benchmarks makes it the safer recommendation.