Intel Core i9-13900 vs Intel Xeon Gold 6338T Comparison

The Intel Core i9-13900 and the Intel Xeon Gold 6338T occupy different corners of the Intel lineup, yet their aggregate benchmark scores place them as direct competitors. The Core i9-13900, a Raptor Lake desktop part, posts an average benchmark score of 60,676, while the Ice Lake-SP Xeon Gold 6338T trails by a razor-thin 0.2% with an average of 60,572. Both sit at the 92nd percentile among all CPUs. Despite the near-identical overall averages, the two processors achieve parity through wildly different performance profiles. The data reveals a head-to-head record of 15 wins for the Core i9-13900 and only 2 for the Xeon Gold 6338T, with the Xeon’s victories coming in narrowly specialized workloads rather than broad compute tasks.

Head-to-Head Benchmarks

The Core i9-13900 dominates the Cinebench suite with a consistent margin of roughly 24.7% across every iteration. In Cinebench R23 multi-core, the i9 scores 37,931 against the Xeon’s 30,430. The single-core gap is identical in percentage terms: 5,355 versus 4,296. This uniformity extends to older versions—R15 multi-core shows 3,823 versus 3,067 (24.6% delta) and R20 multi-core shows 15,931 versus 12,780 (24.7% delta). The pattern is clear: the desktop chip holds a decisive, clock-driven advantage in both single-threaded and multi-threaded rendering workloads.

The PassMark suite reveals a more nuanced picture. The i9 wins multithread by 27.6% (45,680 vs 35,801) and single-thread by an enormous 83.5% (4,309 vs 2,348). The floating-point math test goes to the i9 by 33%, with scores of 120,492 against 90,584. Integer math sees a narrower 15.7% margin (176,107 vs 152,275). Data encryption heavily favors the i9 at 42.8% (35,242 vs 24,677), and prime number finding shows a 57.6% delta (186 vs 118). The physics test produces the largest single delta of the entire comparison: the i9 scores 2,484 versus the Xeon’s 1,160, a 114.1% advantage.

The Xeon’s two wins are interesting counterpoints. In extended instructions, the Xeon Gold 6338T scores 43,292 against the i9’s 32,760, a 24.3% margin. This suggests the server chip’s AVX-512 implementation provides a measurable throughput advantage in vectorized workloads. The other win is in random string sorting, where the Xeon posts 66,495 versus 64,396—a modest 3.2% edge. Data compression goes to the i9 but only by 3.5% (577,285 vs 557,816), indicating that the Xeon’s higher thread count nearly compensates for its lower clock speed in that particular task.

FAQ

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

A: The Intel Core i9-13900 wins decisively. In Cinebench R23 single-core it scores 5,355 versus the Xeon Gold 6338T’s 4,296, a 24.7% advantage. The PassMark single-thread test shows an even larger gap: 4,309 versus 2,348, an 83.5% difference.

Q: How do the two chips compare in memory bandwidth capacity?

A: The Xeon Gold 6338T has a substantial structural advantage with its eight-channel memory bus and a rated memory bandwidth of 204.8 GB/s. The Core i9-13900 uses a dual-channel bus and has no listed memory bandwidth figure in the data.

Q: Does the Xeon Gold 6338T win any benchmark against the Core i9-13900?

A: Yes, it wins two tests. The Xeon leads in extended instructions by 24.3% (43,292 vs 32,760) and in random string sorting by 3.2% (66,495 vs 64,396). These are the only two head-to-head tests where it comes out ahead.

Q: What are the core and thread counts for each processor?

A: Both have 24 cores. The Core i9-13900 has 32 threads, while the Xeon Gold 6338T has 48 threads. The Xeon’s 48 threads are enabled by Hyper-Threading on all 24 cores, whereas the i9’s 32 threads reflect its hybrid architecture.

Q: Are both processors currently in production?

A: Yes, both are listed as "Active" in production status. The Core i9-13900 was released on 2023-01-03, while the Xeon Gold 6338T was released earlier on 2021-04-05.

Q: Which processor supports ECC memory?

A: Both support ECC memory. The Core i9-13900 supports ECC with its DDR4/DDR5 memory support, and the Xeon Gold 6338T also supports ECC with its DDR4-only memory support.

Architecture Differences

The two processors represent different architectural generations and design philosophies. The Core i9-13900 uses the Raptor Lake architecture on a 10 nm process with a die size of 257 mm². Its cache hierarchy is built around per-core allocations: 80 KB of L1 and 2 MB of L2 per core, plus a 36 MB shared L3. The Xeon Gold 6338T uses the older Ice Lake-SP architecture, also on a 10 nm process, but with smaller per-core caches: 64 KB L1 and 1 MB L2 per core, sharing the same 36 MB L3.

The fundamental architectural split lies in the core design. The i9-13900 is a hybrid part, combining performance and efficiency cores to reach 24 cores and 32 threads. The Xeon Gold 6338T is a homogeneous server design with 24 full cores and 48 threads. This explains why the Xeon has more threads despite identical core counts. The i9’s boost clock of 5.60 GHz dwarfs the Xeon’s 3.40 GHz, which drives the massive single-threaded deltas.

Memory architecture diverges sharply. The i9 supports both DDR4 and DDR5 over a dual-channel bus. The Xeon supports only DDR4 but over an eight-channel bus, yielding a rated memory bandwidth of 204.8 GB/s. The i9 has no memory bandwidth figure listed. PCIe connectivity also differs: the i9 provides Gen 5 with 16 lanes, while the Xeon provides Gen 4 with 64 lanes. The i9 includes integrated UHD Graphics 770; the Xeon has no integrated graphics. Both are locked multipliers and come from Intel’s 10 nm process.

Specification Differences

The Core i9-13900 and Xeon Gold 6338T differ in nearly every headline specification except core count and L3 cache. The i9 has a base clock of 2000 MHz and a boost clock of 5.60 GHz; the Xeon has a base of 2.10 GHz and a boost of 3.40 GHz. TDP differs significantly: 65 W for the i9 versus 165 W for the Xeon.

Socket compatibility separates them entirely. The i9 uses Intel Socket 1700, while the Xeon uses Intel Socket 4189. Memory support sees the i9 accept DDR4 and DDR5 on dual-channel, whereas the Xeon is DDR4-only on eight-channel. The i9’s cache per core is larger (80 KB L1, 2 MB L2) versus the Xeon’s (64 KB L1, 1 MB L2). Thread counts differ at 32 for the i9 and 48 for the Xeon.

PCIe generations and lane counts differ: the i9 runs Gen 5 with 16 lanes; the Xeon runs Gen 4 with 64 lanes. Integrated graphics exist only on the i9 (UHD Graphics 770). The market segments reflect the design intent: Desktop for the i9, Server/Workstation for the Xeon. The i9 has a launch MSRP of $549; the Xeon has no listed launch MSRP. The i9’s part number is SRMB6; the Xeon has no part number listed. Release dates are 2023-01-03 for the i9 and 2021-04-05 for the Xeon.

Where Each One Wins

The Core i9-13900 is the clear winner for latency-sensitive, clock-bound workloads. Its 83.5% lead in PassMark single-thread and 24.7% lead in Cinebench single-core make it the superior choice for applications that rely on per-core speed. The physics test, where the i9 leads by 114.1%, reinforces this. Content creation, rendering, and general desktop productivity all favor the i9 due to its combination of high boost clocks and competitive multi-threaded scores. The data encryption result (42.8% lead) and prime number finding (57.6% lead) further cement the i9’s dominance in integer-heavy and cryptographic tasks.

The Xeon Gold 6338T wins in niche server-oriented scenarios. Its 24.3% lead in extended instructions indicates a clear advantage for workloads that leverage advanced vector instruction sets, likely due to the Ice Lake-SP’s AVX-512 support. The 3.2% win in random string sorting, while small, suggests the Xeon’s higher thread count and eight-channel memory bandwidth provide an edge in certain data-processing pipelines. The Xeon’s 64 PCIe Gen 4 lanes and 204.8 GB/s memory bandwidth make it structurally suited for high-throughput server environments, even if the benchmark data does not heavily favor it.

The aggregate scores tell the final story. With a 0.2% difference in average benchmark score, these processors are statistically tied overall. But the distribution of wins is lopsided. The i9 wins 15 of 17 head-to-head tests, often by large margins. The Xeon’s two wins are in specialized domains where its architectural features—vector instruction throughput and memory bandwidth—override its clock speed disadvantage. For general compute, the i9 is the stronger part. For specific server workloads that utilize its extended instructions and memory capacity, the Xeon justifies its existence.