AMD EPYC 9354P vs AMD Ryzen 3 8440U Comparison

Where Each One Wins

The AMD EPYC 9354P and the AMD Ryzen 3 8440U occupy opposite ends of the computing spectrum, and the benchmark data reflects that divide clearly. In the six head-to-head Cinebench tests recorded in the database, the EPYC 9354P wins all six. The Ryzen 3 8440U records zero wins in that direct comparison, but its broader benchmark portfolio tells a more nuanced story for mobile workloads.

The EPYC 9354P is built for throughput. Its 32 cores and 64 threads dominate multi-threaded rendering, with a Cinebench R23 multicore score of 63840 against the Ryzen 3's 10884. That is a 486.5% advantage, a gap that only widens in other multi-core workloads. The single-core results are equally lopsided: 9012 versus 1536 in Cinebench R23, a 486.7% delta. The EPYC also holds a 69th percentile ranking among all CPUs in the database, while the Ryzen 3 sits at the 70th percentile, a statistical near-tie despite the massive raw score differences.

The Ryzen 3 8440U wins in a different arena: efficiency and platform suitability. Its 28 W TDP and integrated Radeon 740M graphics make it a self-contained mobile solution, whereas the EPYC 9354P requires a server platform with a 280 W TDP and no integrated graphics. The Ryzen 3's PassMark results show strengths in specific integer and floating-point tasks relative to its core count, with 37468 in integer math and 23017 in floating-point math. Its 8 MB shared L3 cache is small, but the 4 nm process node and 4.70 GHz boost clock give it a responsiveness profile that suits light, latency-sensitive workloads.

The data indicates a clear split: the EPYC 9354P wins every benchmark where both chips are measured, but the Ryzen 3 8440U wins on mobility, power envelope, and integrated feature set. Neither chip is a substitute for the other; they serve different physical and performance realities.

Architecture Differences

The two processors share the same Zen 4 architecture and TSMC foundry, but diverge sharply in every physical and platform dimension. The EPYC 9354P is built on a 5 nm process with 52,560 million transistors spread across 8x 72 mm² dies. It uses the AMD Socket SP5 server platform, supports DDR5 memory across a twelve-channel bus, and delivers 460.8 GB/s of memory bandwidth. It also offers 128 PCIe Gen 5 lanes from the CPU alone, making it a data-center oriented part.

The Ryzen 3 8440U, codenamed Hawk Point, uses a 4 nm process with 20,900 million transistors on a single 137 mm² die. It fits the AMD Socket FP7 mobile platform, supports dual-channel DDR5, and provides 89.6 GB/s of memory bandwidth. PCIe support drops to Gen 4 with 14 lanes. The Ryzen 3 includes Radeon 740M integrated graphics; the EPYC 9354P has no integrated graphics at all. ECC memory is supported on the EPYC but not on the Ryzen 3.

Cache hierarchies also differ substantially. Both use 64 KB L1 and 1 MB L2 per core, but the EPYC's shared L3 is 256 MB, versus 8 MB on the Ryzen 3. That 32x difference in L3 capacity reflects the EPYC's server design for large working sets and virtualized environments. The EPYC 9354P has a base clock of 3.25 GHz and a boost of 3.80 GHz; the Ryzen 3 has a lower 3.00 GHz base but a much higher 4.70 GHz boost. The Ryzen 3's higher peak frequency compensates partially for its smaller core count in lightly threaded tasks, though the benchmark data shows even its single-core scores trail the EPYC by roughly 486%.

Process node differences matter: 4 nm versus 5 nm gives the Ryzen 3 a density and efficiency edge, which aligns with its 28 W TDP. The EPYC's 280 W TDP is ten times higher, appropriate for a socket designed to feed 32 cores and a twelve-channel memory controller.

Head-to-Head Benchmarks

The database records six direct Cinebench comparisons between these two processors, and the EPYC 9354P wins each by a margin of roughly 486% to 490%. The consistency of that delta across different Cinebench versions and thread counts is striking.

In Cinebench R15 multicore, the EPYC scores 6434 against the Ryzen 3's 1097, a 486.5% advantage. The single-core R15 test shows 908 versus 154, a 489.6% delta. Cinebench R20 multicore produces 26812 versus 4571, a 486.6% gap, while single-core R20 lands at 3785 versus 645, a 486.8% delta. Cinebench R23 multicore shows 63840 versus 10884, again 486.5%, and single-core R23 closes at 9012 versus 1536, a 486.7% difference.

The near-identical percentage gaps across all six tests suggest the performance ratio is determined primarily by the core and thread count difference, with the Ryzen 3's higher boost clock offset by the EPYC's larger cache and wider memory bus. The EPYC's 256 MB L3 cache and 460.8 GB/s bandwidth prevent memory-bound saturation even with 64 threads active, while the Ryzen 3's 8 MB L3 and 89.6 GB/s bandwidth limit its scaling in sustained multi-threaded loads.

The Ryzen 3 does not appear in the head-to-head list with any wins, but its PassMark suite provides additional context. It scores 12805 in PassMark multithread and 3648 in PassMark single-thread. Its data compression score of 146273 and encryption score of 8012 show strong per-core performance in those specific workloads. The EPYC 9354P has no PassMark entries in the database, so those workloads cannot be compared directly. The recorded data only supports the Cinebench comparisons, and those are unanimous.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 9354P has 32 cores and 64 threads. The AMD Ryzen 3 8440U has 4 cores and 8 threads.

Q: How much L3 cache does each processor have?

A: The EPYC 9354P has 256 MB of shared L3 cache. The Ryzen 3 8440U has 8 MB of shared L3 cache.

Q: Which chip supports ECC memory?

A: The EPYC 9354P supports ECC memory. The Ryzen 3 8440U does not.

Q: What is the TDP difference between the two?

A: The EPYC 9354P has a 280 W TDP. The Ryzen 3 8440U has a 28 W TDP.

Q: Does the Ryzen 3 8440U have integrated graphics?

A: Yes, it includes Radeon 740M integrated graphics. The EPYC 9354P has no integrated graphics.

Q: What is the memory bandwidth of each?

A: The EPYC 9354P provides 460.8 GB/s over a twelve-channel DDR5 bus. The Ryzen 3 8440U provides 89.6 GB/s over a dual-channel DDR5 bus.

The Verdict

The data supports a straightforward conclusion: the AMD EPYC 9354P is the overwhelming performance leader in every benchmark where both are measured. Its six Cinebench wins with deltas around 486% reflect a 32-core, 64-thread design with 256 MB L3 cache and twelve-channel memory bandwidth. Any workload that scales across cores, such as rendering, scientific computing, or virtualized server environments, belongs to the EPYC 9354P. Its 69th percentile ranking among all CPUs, while only one point below the Ryzen 3's 70th percentile, understates the magnitude of its raw score advantage because the percentile accounts for the broader CPU landscape where both chips rank similarly.

The AMD Ryzen 3 8440U is not a competitor in that arena. Its 4 cores, 8 threads, 8 MB L3, and 28 W TDP make it a mobile processor for laptops and compact systems. Its integrated Radeon 740M graphics eliminate the need for a discrete GPU in basic systems. Its 4.70 GHz boost clock gives it strong single-thread responsiveness, and its PassMark scores in integer math, floating-point math, and data compression show it handles everyday tasks competently. It also holds a 70th percentile ranking, statistically identical to the EPYC's 69th percentile, which indicates that in the full database context, the Ryzen 3 is not an outlier on the low end.

The choice between them is dictated by platform, not raw performance. A server or workstation build with Socket SP5, DDR5 twelve-channel memory, and PCIe Gen 5 lanes should use the EPYC 9354P. A thin-and-light laptop with Socket FP7, dual-channel DDR5, and integrated graphics should use the Ryzen 3 8440U. The EPYC's launch MSRP is $2730, which reflects its data-center positioning. The Ryzen 3 has no recorded launch MSRP in the database. Neither processor is unlocked for overclocking, and both are currently in active production.

The verdict is not about which is better; it is about which fits the machine. The EPYC 9354P is a server-class compute engine with no integrated graphics and a 280 W power budget. The Ryzen 3 8440U is a mobile chip built for battery-conscious devices with a 28 W power budget and a complete graphics solution. The benchmark results confirm the EPYC's dominance in raw compute, but the Ryzen 3's feature set and efficiency make it the sensible pick for portable systems. Buyers seeking maximum multi-threaded performance should choose the EPYC 9354P. Buyers seeking a self-contained mobile processor should choose the Ryzen 3 8440U.