AMD EPYC 9354 vs AMD Ryzen 9 9850HX Comparison

Head-to-Head Benchmarks

The recorded data shows a clear split between these two processors: the AMD EPYC 9354 wins 9 of the 11 shared benchmark tests, while the AMD Ryzen 9 9850HX takes the remaining 2. The margin of victory varies dramatically depending on the workload type, which tells the real story here.

In multi-threaded and throughput-oriented tests, the EPYC 9354 dominates. The largest gap appears in the physics test, where the EPYC scores 9281 against the Ryzen's 3054, a 203.9% advantage. This is not a small edge; it is more than triple the score. Similarly, the find prime numbers test shows the EPYC at 934 versus 323 for the Ryzen, a 189.2% lead. These are compute-heavy, parallel workloads where the EPYC's 32 cores and 64 threads provide an insurmountable advantage over the Ryzen's 12 cores and 24 threads.

Data encryption shows a 122.2% delta, with the EPYC scoring 71400 and the Ryzen 32139. Random string sorting follows at a 100.5% delta, with scores of 140690 and 70175 respectively. The EPYC also leads in data compression by 76.4%, scoring 1168626 against 662381. Integer math shows a 76.3% delta (304828 vs 172943), and floating point math a 64.2% delta (188894 vs 115062). Extended instructions complete the multi-thread sweep with a 60.1% delta (86176 vs 53817). Even the multithread aggregate score, which averages many operations, favors the EPYC by 40.4% (72615 vs 51722).

The Ryzen 9 9850HX's only wins come in single-thread performance. Both the passmark_single_thread and passmark_singlethread tests record identical scores of 4461 for the Ryzen and 2601 for the EPYC, a 41.7% delta in favor of the mobile chip. This is a substantial margin, indicating that the Ryzen's higher boost clock of 5.20 GHz, compared to the EPYC's 3.80 GHz, pays off in latency-sensitive, single-core tasks. However, these two wins are the exception, not the rule.

Looking at the broader context, the EPYC 9354 sits in the 97th percentile of all CPUs with an average benchmark score of 126810. Its nearest rivals include the Intel Xeon 6730P (average score 124756, a 1.6% delta) and the AMD Ryzen Threadripper PRO 5975WX (average score 124171, a 2.1% delta). The EPYC is also 2.3% ahead of the AMD EPYC 7642 (average score 124006). The Ryzen 9 9850HX also lands in the 97th percentile, but with a lower average score of 106413. Its nearest rivals are the Intel Xeon w7-3555 (average score 106192, a 0.2% delta) and the Intel Xeon 6521P (average score 105845, a 0.5% delta). The Ryzen trails the Intel Xeon w7-2595X by 2.1% (average score 108663) and leads the AMD EPYC 8324P by 3% (average score 103329). This places the two chips in different performance tiers despite sharing the same percentile rank.

Where Each One Wins

The EPYC 9354 is the clear winner for server and workstation workloads that scale across many cores. Its 32 cores and 64 threads, combined with a 256 MB shared L3 cache, make it ideal for database compression, encryption, scientific simulations, and any task that can be parallelized. The data shows this in every multi-threaded category, with deltas ranging from 40.4% to 203.9%. If the workload involves heavy number crunching, sorting large datasets, or encrypting data streams, the EPYC is the obvious choice based on benchmark results.

The Ryzen 9 9850HX wins in single-thread scenarios. Its 5.20 GHz boost clock, compared to the EPYC's 3.80 GHz, gives it a 41.7% edge in single-core tests. This matters for applications that are not well-parallelized, such as certain legacy software, interactive workloads, or tasks where latency per operation is critical. The Ryzen also benefits from a smaller footprint: it is a mobile processor with a 55 W TDP, whereas the EPYC consumes 280 W. However, the database does not include power efficiency metrics, so the TDP figures are listed for specification comparison only.

The use-case split is stark. The EPYC is for throughput; the Ryzen is for responsiveness. A server handling many concurrent requests will prefer the EPYC's multithread aggregate score of 72615. A mobile workstation running a single-threaded application will prefer the Ryzen's single-thread score of 4461. Neither chip is a generalist replacement for the other; they serve different segments.

FAQ

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

A: The AMD Ryzen 9 9850HX scores 4461 in both passmark_single_thread and passmark_singlethread, which is 41.7% higher than the AMD EPYC 9354's score of 2601.

Q: What is the largest performance gap between the two chips?

A: The biggest delta is in the passmark_physics test, where the AMD EPYC 9354 scores 9281 compared to 3054 for the AMD Ryzen 9 9850HX, a 203.9% advantage.

Q: How many benchmark wins does each processor have?

A: The AMD EPYC 9354 wins 9 out of 11 shared tests, while the AMD Ryzen 9 9850HX wins 2 (the single-thread tests).

Q: What is the average benchmark score for each processor?

A: The AMD EPYC 9354 has an average benchmark score of 126810, and the AMD Ryzen 9 9850HX has an average benchmark score of 106413. Both are in the 97th percentile of all CPUs.

Q: Does the Ryzen 9 9850HX have integrated graphics?

A: Yes, the AMD Ryzen 9 9850HX includes a Radeon 610M integrated GPU. The AMD EPYC 9354 does not list any integrated graphics in the database.

Q: Which processor has more L3 cache?

A: The AMD EPYC 9354 has 256 MB of shared L3 cache, while the AMD Ryzen 9 9850HX has 64 MB of L3 cache.

Specification Differences

The two processors differ in nearly every core specification. The AMD EPYC 9354 has 32 cores and 64 threads, while the AMD Ryzen 9 9850HX has 12 cores and 24 threads. Base clocks are 3.25 GHz for the EPYC and 3.00 GHz for the Ryzen. Boost clocks diverge significantly: the EPYC reaches 3.80 GHz, while the Ryzen boosts to 5.20 GHz. TDP is another major differentiator, with the EPYC rated at 280 W and the Ryzen at 55 W.

Memory support also differs. The EPYC uses a twelve-channel memory bus with a bandwidth of 460.8 GB/s, while the Ryzen uses a dual-channel bus with 89.6 GB/s. Both support DDR5 and ECC memory. PCIe lanes vary as well: the EPYC offers 128 Gen 5 lanes (CPU only), whereas the Ryzen provides 28 Gen 5 lanes (CPU only). The socket types are incompatible, with the EPYC on AMD Socket SP5 and the Ryzen on AMD Socket FL1.

The launch MSRP of the EPYC 9354 is $3420; the Ryzen 9 9850HX has no recorded launch MSRP. The EPYC has a locked multiplier, while the Ryzen is multiplier-unlocked. The EPYC was released on 2022-11-09, and the Ryzen on 2025-01-05. Part numbers are 100-100000798 for the EPYC and 100-000001366 for the Ryzen.

Architecture Differences

The architectural split is fundamental. The AMD EPYC 9354 uses Zen 4 architecture on a 5 nm process, codenamed Genoa, from the EPYC 9004 series. The AMD Ryzen 9 9850HX uses Zen 5 architecture on a 4 nm process, codenamed Fire Range, from the 9000 series. Both are manufactured by TSMC, but the transistor counts differ: the EPYC packs 52,560 million transistors across 8 dies of 72 mm² each, while the Ryzen has 16,630 million transistors across 2 dies of 70.6 mm² each.

Cache hierarchies differ per core. The EPYC has 64 KB of L1 cache per core and 1 MB of L2 per core. The Ryzen has 80 KB of L1 per core and 1 MB of L2 per core. L3 cache is the largest divergence: the EPYC has 256 MB shared, while the Ryzen has 64 MB. Neither chip uses 3D V-Cache. The EPYC is a server/workstation part, while the Ryzen is a mobile part. Both are Active in production status.

The Verdict

The data directs a clear choice based on workload. The AMD EPYC 9354 is the processor for multi-threaded, server-class workloads. It wins 9 of 11 benchmarks, with deltas exceeding 40% in every multi-thread test. Its 32 cores, 64 threads, and 256 MB L3 cache make it suitable for data centers, virtualization hosts, or heavy computational tasks. The average benchmark score of 126810 places it slightly above rivals like the Intel Xeon 6730P and AMD Ryzen Threadripper PRO 5975WX, confirming its position in the high-end server segment.

The AMD Ryzen 9 9850HX is the choice for single-thread performance and mobile use. Its 41.7% single-thread advantage over the EPYC is the only area where it leads, but that edge matters for applications that cannot use multiple cores effectively. With a 55 W TDP and integrated Radeon 610M graphics, it is designed for laptops and compact systems. Its average benchmark score of 106413 is competitive with nearby Xeon parts, though it trails the EPYC by a significant margin overall.

Pick the EPYC 9354 if the workload is parallel and demands maximum throughput. Pick the Ryzen 9 9850HX if the priority is single-core speed, lower power consumption, and a mobile form factor. The benchmark record does not support using either as a substitute for the other.