AMD EPYC Embedded 8224P vs AMD Ryzen 9 8945HX Comparison

The AMD EPYC Embedded 8224P and the AMD Ryzen 9 8945HX represent two distinct philosophies within AMD’s 5 nm lineup, one designed for dense server deployments and the other for high-performance mobile computing. While their average benchmark scores are nearly identical — the EPYC scores 76,492 against the Ryzen’s 76,212, a difference of just 0.4% — the underlying data reveals a fascinating split in workload dominance. The Ryzen 9 8945HX wins 11 of the 17 head-to-head tests, yet the EPYC’s six victories include some of the most dramatic swings in the entire comparison, suggesting that raw core count and architectural density can be decisive in specific scenarios.

Head-to-Head Benchmarks

The most striking result in the comparison is the PassMark physics test, where the EPYC Embedded 8224P scores 4,110 against the Ryzen 9 8945HX’s 2,168. That is an 89.6% advantage for the server chip, a margin so large it suggests the EPYC’s 24-core, 48-thread configuration is far better suited to physics simulations that scale aggressively with thread count. The Ryzen’s 16-core, 32-thread setup simply cannot keep pace in this particular workload, despite its higher boost clock of 5.40 GHz.

The EPYC also shows clear superiority in several other PassMark subtests. In find prime numbers, it leads by 9.2% (286 vs 262), and in random string sorting it is 8.5% ahead (85,505 vs 78,781). Data encryption favors the EPYC by 6.8% (43,619 vs 40,836), and floating point math goes to the EPYC by 2.2% (120,066 vs 117,453). Data compression is a narrow win for the EPYC at 0.6% (681,754 vs 677,755), bringing its total to six wins.

The Ryzen 9 8945HX counters with a near-sweep of the Cinebench suite. In R23 multi-core, it scores 42,713 versus the EPYC’s 41,542, a 2.7% lead. The same margin appears in R20 multi-core (17,939 vs 17,447) and R15 multi-core (4,305 vs 4,187). Single-core Cinebench results show a consistent 2.8% advantage for the Ryzen across all three versions (R15: 607 vs 590, R20: 2,532 vs 2,462, R23: 6,030 vs 5,864). The PassMark multithread test goes to the Ryzen by 4.9% (51,405 vs 48,873), and extended instructions favor the Ryzen by 7.5% (49,823 vs 46,091). Integer math is nearly a tie, with the Ryzen ahead just 1% (195,180 vs 193,256).

The single-threaded PassMark results are where the Ryzen truly dominates. It scores 3,907 versus the EPYC’s 2,357, a massive 39.7% gap. This is the clearest evidence of the architectural difference: the Ryzen’s Zen 4 cores are built for maximum single-thread performance, while the EPYC’s Zen 4c cores prioritize density and efficiency over raw clock speed.

Where Each One Wins

The data paints a clear picture of workload specialization. The Ryzen 9 8945HX is the winner in general-purpose computing, particularly in tasks that rely on single-core speed or benefit from high boost clocks. Every Cinebench test — both single and multi-core — goes to the Ryzen, which indicates it is better suited for content creation, 3D rendering, and other applications that use these benchmarks as proxies for real-world performance. Its 39.7% lead in PassMark single-thread performance confirms this, making it the obvious choice for responsiveness in everyday tasks and lightly-threaded applications.

The EPYC Embedded 8224P, despite losing the Cinebench multi-core tests by 2.7%, wins in several specialized PassMark workloads. Its 89.6% advantage in physics is the standout, suggesting it is the better choice for simulation and scientific computing that heavily utilizes physics calculations. The 9.2% lead in prime number finding and 8.5% lead in random string sorting indicate strength in cryptography and data processing tasks. The 6.8% edge in data encryption reinforces this, as does the 2.2% win in floating point math. For server workloads involving these specific operations, the EPYC’s additional cores and threads provide a tangible benefit.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD EPYC Embedded 8224P has a marginally higher average benchmark score of 76,492 compared to the Ryzen 9 8945HX’s 76,212, a difference of 0.4%.

Q: How large is the single-thread performance gap?

A: The Ryzen 9 8945HX leads the PassMark single-thread test by 39.7%, scoring 3,907 versus the EPYC’s 2,357. This is the largest single delta in the comparison.

Q: Which processor wins the Cinebench R23 multi-core test?

A: The Ryzen 9 8945HX wins with a score of 42,713, which is 2.7% higher than the EPYC Embedded 8224P’s 41,542.

Q: Is the EPYC better at any PassMark test?

A: Yes, the EPYC wins six tests: data compression, data encryption, find prime numbers, floating point math, physics, and random string sorting. Its largest win is in physics, where it leads by 89.6%.

Q: What is the difference in core and thread counts?

A: The EPYC has 24 cores and 48 threads, while the Ryzen has 16 cores and 32 threads. Despite having more cores, the EPYC loses most multi-threaded tests due to lower clock speeds.

Q: Which processor has a higher boost clock?

A: The Ryzen 9 8945HX has a boost clock of 5.40 GHz, significantly higher than the EPYC’s 3.00 GHz. The base clocks are closer, at 2.50 GHz for the Ryzen and 2.55 GHz for the EPYC.

Specification Differences

The most obvious difference is core count: the EPYC offers 24 cores and 48 threads, while the Ryzen provides 16 cores and 32 threads. The Ryzen compensates with much higher clock speeds, boosting to 5.40 GHz versus the EPYC’s 3.00 GHz, though the base clocks are nearly identical (2.55 GHz for EPYC, 2.50 GHz for Ryzen). Thermal design power tells the story of their intended environments: the EPYC is rated at 160 W, while the Ryzen sips at just 55 W.

Memory architecture diverges sharply. The EPYC supports six-channel DDR5 memory with a bandwidth of 230.4 GB/s, while the Ryzen uses dual-channel DDR5 with 83.2 GB/s. The EPYC also includes ECC memory support, which the Ryzen lacks. PCIe lanes are another differentiator: the EPYC provides 96 Gen 5 lanes, while the Ryzen offers 28. Socket types differ as well, with the EPYC using AMD Socket SP6 and the Ryzen using AMD Socket FL1.

The Ryzen includes integrated Radeon 610M graphics, while the EPYC has none. The Ryzen also has an unlocked multiplier, enabling overclocking, whereas the EPYC does not. Release dates are separated by roughly 19 months, with the EPYC launching in September 2023 and the Ryzen in April 2025.

Architecture Differences

Both processors are built on TSMC’s 5 nm process, but they use different Zen variants. The EPYC Embedded 8224P uses Zen 4c architecture under the codename Siena, which is specifically designed for high core density in power-constrained server environments. The Ryzen 9 8945HX uses full Zen 4 architecture under the codename Dragon Range, optimized for maximum performance in mobile form factors.

The transistor counts reflect this design philosophy. The EPYC packs 17,750 million transistors across a die size of 2x 73 mm², while the Ryzen contains 13,140 million transistors on a 2x 71 mm² die. The EPYC’s higher transistor count enables its 24-core configuration, though the Zen 4c cores are likely clocked lower to maintain power efficiency. Both processors share the same L1 cache (64 KB per core) and L2 cache (1 MB per core), and both have 64 MB of L3 cache.

The EPYC’s server pedigree is evident in its six-channel memory bus and support for ECC memory, both of which are absent from the Ryzen’s dual-channel configuration. The EPYC also leads in PCIe connectivity with 96 Gen 5 lanes versus the Ryzen’s 28, making it the clear choice for systems requiring extensive I/O expansion. The Ryzen’s integrated Radeon 610M graphics is a notable feature for mobile systems, eliminating the need for a discrete GPU in basic display tasks.

The Verdict

The data supports a straightforward conclusion: the AMD Ryzen 9 8945HX is the better all-around processor for most users. It wins 11 of 17 benchmarks, including all six Cinebench tests, and its 39.7% single-thread advantage is decisive for everyday responsiveness. The 4.9% win in PassMark multithread, despite having fewer cores, demonstrates that the Ryzen’s higher clock speeds more than compensate for its core deficit in general multi-threaded workloads. Its 55 W TDP makes it suitable for mobile devices, and the unlocked multiplier offers flexibility for enthusiasts.

The AMD EPYC Embedded 8224P is the specialist’s choice. Its 89.6% physics benchmark win is extraordinary and suggests it is the superior option for simulation-heavy workloads. The 9.2% edge in prime number finding, 8.5% in random string sorting, and 6.8% in data encryption make it attractive for server applications involving cryptography and data processing. The six-channel memory bus, ECC support, and 96 PCIe Gen 5 lanes position it as a platform for memory-bandwidth-intensive and I/O-heavy server deployments. For users whose workloads align with these specific strengths, the EPYC’s lower average benchmark score is irrelevant — the data shows it wins where it matters most.