AMD EPYC 9354 vs Intel Xeon w9-3575X Comparison

The Intel Xeon w9-3575X and AMD EPYC 9354 occupy the same server and workstation segment, but the recorded data shows they prioritize very different strengths. Intel's chip wins 11 of the 16 head-to-head benchmarks, including every Cinebench test and a commanding single-thread lead, while the EPYC 9354 counters with wins in encryption, integer math, physics, prime number computation, and string sorting. Both sit near the very top of the database, with the Xeon in the 98th percentile against all CPUs and the EPYC in the 97th.

Head-to-Head Benchmarks

The Cinebench suite belongs entirely to the Xeon w9-3575X, and by an unusually consistent margin. Every Cinebench test, single-core and multi-core alike, lands at a 14.8% advantage for the Intel part: 7140 versus 6221 in R15 multi-core, 1008 versus 878 in R15 single-core, 29751 versus 25923 in R20 multi-core, 4200 versus 3659 in R20 single-core, and 70837 versus 61722 in R23 multi-core. That consistency is revealing. The Xeon wins multi-core by the same margin as single-core, meaning the gap comes from per-core throughput and clock behavior rather than simply having more cores, though its 44 cores and 88 threads against 32 cores and 64 threads certainly do not hurt.

PassMark MultiThread tells the same story: 83338 for the Xeon against 72615 for the EPYC, again a 14.8% Intel win. Single-thread is far more lopsided, with the Xeon scoring 3672 against the EPYC's 2601, a 41.2% gap. This mirrors the clock specifications: the Xeon boosts to 4.80 GHz from a 2.20 GHz base, while the EPYC runs a narrower 3.25 GHz base to 3.80 GHz boost range.

The EPYC's wins cluster in specific computational kernels rather than general rendering. Its strongest result is data encryption at 71400 versus 62258, a 12.8% advantage. Prime number finding goes to AMD by 26.4% (934 versus 687), physics by 26.3% (9281 versus 6836), and random string sorting by 4.2% (140690 versus 134723). Integer math is nearly a dead heat, with the EPYC edging ahead 304828 to 298224, a 2.2% margin. The EPYC's large 256 MB shared L3 cache is a plausible factor in these cache-sensitive workloads, where data fits closer to the cores.

The Xeon's remaining wins are emphatic. Floating point math shows the largest gap of the entire comparison: 273398 versus 188894, a 44.7% Intel advantage. Extended instructions go to Intel 109843 to 86176, a 27.5% margin. Data compression is a closer 4.4% win for Intel, 1219584 versus 1168626.

FAQ

Q: Which CPU is faster overall in the database's aggregate scoring?

A: The Xeon w9-3575X posts an average benchmark score of 144323 against the EPYC 9354's 126810. That places the Xeon in the 98th percentile versus all CPUs and the EPYC in the 97th, so both are elite parts, but the Intel chip leads on aggregate.

Q: Which CPU is better for single-threaded workloads?

A: The Xeon, decisively. It leads by 41.2% in PassMark Single Thread (3672 versus 2601) and by 14.8% in Cinebench R20 single-core (4200 versus 3659). Its 4.80 GHz boost clock, compared with the EPYC's 3.80 GHz, aligns with this result.

Q: Does the EPYC 9354 win anything?

A: Yes, five tests: data encryption (by 12.8%), find prime numbers (by 26.4%), physics (by 26.3%), random string sorting (by 4.2%), and integer math (by 2.2%).

Q: Which CPU has the higher memory bandwidth?

A: The EPYC 9354. Its twelve-channel DDR5 bus delivers 460.8 GB/s against the Xeon's eight-channel 307.2 GB/s, a substantial advantage for memory-bound server workloads.

Q: Which rivals sit closest to each CPU in the database?

A: The Xeon w9-3575X is bracketed by the AMD EPYC 7643P (-0.3%), AMD Ryzen 9 PRO 9965X3D (+0.4%), Intel Xeon 6732P (+0.6%), and Intel Xeon 674X (+0.9%). The EPYC 9354's nearest rivals are the Intel Xeon 6730P (+1.6%), AMD Ryzen Threadripper PRO 5975WX (+2.1%), AMD EPYC 7642 (+2.3%), and Intel Xeon 6710E (-2.4%).

Q: Can either CPU be overclocked?

A: Only the Xeon w9-3575X, which has an unlocked multiplier. The EPYC 9354 is locked.

Architecture Differences

These chips come from fundamentally different design philosophies. The Xeon w9-3575X is Sapphire Rapids, built on Intel's own 10 nm process, delivered as four 477 mm² dies for a chiplet-style assembly. The EPYC 9354 is Genoa, AMD's Zen 4 architecture, fabbed by TSMC on 5 nm as eight 72 mm² dies with 52,560 million transistors. AMD's approach uses many small dies; Intel's uses fewer, much larger ones.

Core and cache design diverge sharply. The Xeon pairs its 44 cores with 80 KB of L1 and 2 MB of L2 per core, plus 97.5 MB of L3. The EPYC gives each of its 32 cores 64 KB of L1 and 1 MB of L2, but backs them with a far larger 256 MB shared L3 pool. Per-core cache clearly favors Intel; aggregate last-level cache favors AMD.

Platform characteristics also split. Both support DDR5 with ECC and PCIe Gen 5, but the EPYC offers 128 PCIe lanes against the Xeon's 112, and its twelve-channel memory bus delivers 460.8 GB/s versus 307.2 GB/s. The Xeon counters with its unlocked multiplier and higher boost clock. Neither part has integrated graphics. Sockets are incompatible: Intel Socket 4677 for the Xeon, AMD Socket SP5 for the EPYC. The Xeon launched on August 23, 2024 at a launch MSRP of $3789; the EPYC arrived November 9, 2022 at a launch MSRP of $3420. Both remain in active production, and both carry a TDP premium at the top end: 340 W for the Xeon against 280 W for the EPYC.

The Verdict

The data supports a clear split by workload. For rendering, simulation with heavy floating point demand, and any single-thread-bound professional software, the Xeon w9-3575X is the stronger choice: it sweeps Cinebench by 14.8%, leads floating point math by 44.7%, extended instructions by 27.5%, and single-thread throughput by 41.2%. Its unlocked multiplier adds tuning flexibility the EPYC cannot match.

The EPYC 9354 is the pick when the workload leans on its specific strengths: encryption (12.8% faster), prime computation (26.4% faster), physics (26.3% faster), and integer math, plus its platform advantages of 128 PCIe lanes and 460.8 GB/s of memory bandwidth across twelve channels. Its 256 MB L3 cache and lower 280 W TDP make it better suited to dense, throughput-oriented server deployments.

On raw aggregate performance the Xeon wins, 144323 versus 126810 in average score, and 11 wins to 5 head-to-head. But the margin is concentrated in certain test types, and the EPYC's platform and bandwidth strengths are real. Choose the Xeon for workstation-class compute and responsiveness; choose the EPYC for bandwidth-hungry, encryption-heavy, and integer-bound server duty.

Specification Differences

| Field | Intel Xeon w9-3575X | AMD EPYC 9354 |

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

| Cores | 44 | 32 |

| Threads | 88 | 64 |

| Base Clock | 2.20 GHz | 3.25 GHz |

| Boost Clock | 4.80 GHz | 3.80 GHz |

| TDP | 340 W | 280 W |

| Socket | Intel Socket 4677 | AMD Socket SP5 |

| Architecture | (not specified) | Zen 4 |

| Codename | Sapphire Rapids | Genoa |

| Process Node | 10 nm (Intel) | 5 nm (TSMC) |

| Die Configuration | 4x 477 mm² | 8x 72 mm² |

| Transistors | (not specified) | 52,560 million |

| L1 Cache | 80 KB per core | 64 KB per core |

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

| L3 Cache | 97.5 MB | 256 MB shared |

| Memory Bus | Eight-channel | Twelve-channel |

| Memory Bandwidth | 307.2 GB/s | 460.8 GB/s |

| PCIe Lanes | 112 (Gen 5, CPU only) | 128 (Gen 5, CPU only) |

| Release Date | 2024-08-23 | 2022-11-09 |

| Launch MSRP | $3789 | $3420 |

| Unlocked Multiplier | Yes | No |

Fields where the two agree: both support DDR5 with ECC, both target the Server/Workstation segment, both are in active production, and neither has integrated graphics.