AMD EPYC 7352 vs AMD Ryzen 9 7940HX Comparison

The AMD Ryzen 9 7940HX and the AMD EPYC 7352 occupy opposite ends of the computing spectrum: one is a high-frequency mobile part built for responsiveness, the other a high-core-count server processor designed for throughput. The benchmark data reveals a clear split, with the Ryzen 9 winning 8 of 13 head-to-head tests, while the EPYC takes 5. The Ryzen’s dominance in single-threaded and math-heavy workloads contrasts sharply with the EPYC’s edge in multi-core rendering and specific server tasks, making the choice between them entirely dependent on the intended use case.

Where Each One Wins

The AMD Ryzen 9 7940HX is the clear winner for latency-sensitive and single-threaded applications. Its most striking victory comes in the PassMark single-thread test, where it scores 3942 against the EPYC’s 1979, a 99.2% advantage. This translates directly to faster response times in everyday desktop use, gaming, and lightly threaded productivity software. The Ryzen also excels in floating-point and integer math, scoring 121383 and 202883 respectively, which are 38% and 36.5% ahead of the EPYC. For data compression, the Ryzen leads with 693741 versus 660712, a 5% edge, and it dominates extended instruction workloads (51029 vs 40203, a 26.9% lead) and random string sorting (81775 vs 69231, an 18.1% lead). This pattern points to a processor that handles varied, bursty, and precision-heavy tasks with far greater agility.

The AMD EPYC 7352, on the other hand, asserts its server pedigree in sustained multi-threaded rendering. In Cinebench R23 multi-core, it scores 34314 against the Ryzen’s 29400, a 14.3% advantage. This is a significant margin for a 24-core part, but it comes with a caveat: the EPYC’s single-core Cinebench R23 score of 4844 is oddly far higher than the Ryzen’s 1807, a 62.7% difference that contradicts the PassMark single-thread results, likely indicating different test conditions. The EPYC also wins in data encryption (44426 vs 41974, a 5.5% lead), prime number finding (301 vs 273, a 9.3% lead), and physics simulations (2688 vs 2297, a 14.5% lead). These wins align with server workloads that rely on cryptographic operations, mathematical sieving, and physics solvers, where the EPYC’s higher core count and memory bandwidth provide an advantage.

Architecture Differences

The two processors are built on fundamentally different architectures from different generations. The Ryzen 9 7940HX uses the Zen 4 architecture on a 5 nm TSMC process, with a codename of Dragon Range. It integrates 13,140 million transistors across a die size of 2x 71 mm². In contrast, the EPYC 7352 uses the older Zen 2 architecture on a 7 nm TSMC process, with the codename Rome, packing 15,200 million transistors across a larger 4x 74 mm² die footprint. The process node difference is critical: Zen 4’s 5 nm process allows for higher clock speeds and better power efficiency, which is reflected in the Ryzen’s 5.20 GHz boost clock versus the EPYC’s 3.20 GHz.

The core configurations also differ substantially. The Ryzen 9 has 16 cores and 32 threads, while the EPYC has 24 cores and 48 threads. Despite having 50% more cores, the EPYC’s lower clock speeds and older architecture prevent it from matching the Ryzen in most per-thread performance. The cache hierarchy is another major divergence: the Ryzen has 64 KB of L1 and 1 MB of L2 per core, with a 64 MB L3 cache, while the EPYC has 96 KB of L1 and 512 KB of L2 per core, but a massive 128 MB total L3 cache spread across dies. The EPYC’s larger L3 cache is designed to feed its many cores, but the Ryzen’s per-core L2 cache is twice as large, benefiting single-threaded access patterns.

Memory support is a stark differentiator. The Ryzen 9 supports DDR5 memory over a dual-channel bus, yielding 83.2 GB/s of bandwidth, while the EPYC supports DDR4 over an eight-channel bus, delivering 204.8 GB/s. The EPYC’s memory bandwidth is over twice as high, which is essential for server workloads that stream large datasets. However, the Ryzen’s newer DDR5 support offers lower latency per access. The EPYC also supports ECC memory, which the Ryzen does not, a critical feature for data integrity in server environments. Finally, the Ryzen uses PCIe Gen 5 with 28 lanes, while the EPYC uses PCIe Gen 4 with 128 lanes — a huge difference in expansion capability, though the Ryzen’s newer standard offers higher per-lane bandwidth.

Head-to-Head Benchmarks

The most decisive benchmark is PassMark single-thread, where the Ryzen 9 7940HX scores 3942 against the EPYC’s 1979. This 99.2% delta means the Ryzen is nearly twice as fast per core, a staggering gap that highlights the generational leap from Zen 2 to Zen 4. This result carries over to the PassMark multi-thread test, where the Ryzen scores 53204 versus 40370, a 31.8% lead, despite having only two-thirds the cores of the EPYC. The Ryzen’s advantage in floating-point math is equally pronounced: 121383 vs 87969, a 38% lead, indicating superior execution of scientific and engineering calculations. Integer math follows the same pattern, with the Ryzen at 202883 versus 148605, a 36.5% lead.

The EPYC strikes back in Cinebench R23 multi-core, scoring 34314 versus 29400, a 14.3% victory. This is the EPYC’s largest win in a mainstream benchmark, and it demonstrates that for pure rendering workloads that scale with core count, the 24-core EPYC leverages its extra threads effectively. However, the EPYC’s single-core Cinebench R23 result of 4844 versus the Ryzen’s 1807 is anomalous — a 62.7% difference that is inconsistent with the PassMark single-thread data, suggesting either a different turbo behavior or a test anomaly. In data encryption, the EPYC wins narrowly, 44426 vs 41974, a 5.5% margin, while the Ryzen takes data compression easily, 693741 vs 660712, a 5% edge.

In physics simulations, the EPYC wins 2688 vs 2297, a 14.5% lead, and in prime number finding it wins 301 vs 273, a 9.3% margin. The Ryzen counters with a 26.9% lead in extended instructions (51029 vs 40203) and an 18.1% lead in random string sorting (81775 vs 69231). Overall, the Ryzen’s wins are larger in magnitude — with three deltas above 30% — while the EPYC’s wins are more modest, with only one delta above 14.5%. This indicates that the Ryzen’s performance advantage is more pronounced in the workloads it wins, while the EPYC’s victories are narrower and more specialized.

Specification Differences

The most fundamental difference is the core and thread count: the Ryzen 9 7940HX has 16 cores and 32 threads, while the EPYC 7352 has 24 cores and 48 threads. Clock speeds diverge sharply, with the Ryzen’s base clock at 2.40 GHz and boost at 5.20 GHz, versus the EPYC’s 2.30 GHz base and 3.20 GHz boost. The Ryzen has a much lower TDP of 55 watts, while the EPYC draws 155 watts, reflecting its server-oriented power envelope. The process nodes differ: the Ryzen uses 5 nm TSMC, the EPYC uses 7 nm TSMC. The Ryzen’s cache is configured as 64 KB L1 and 1 MB L2 per core with 64 MB L3, whereas the EPYC has 96 KB L1 and 512 KB L2 per core with 128 MB total L3.

Memory support is entirely different: the Ryzen uses DDR5 with a dual-channel bus and 83.2 GB/s bandwidth, while the EPYC uses DDR4 with an eight-channel bus and 204.8 GB/s bandwidth. ECC memory is supported only on the EPYC. PCIe capabilities also differ, with the Ryzen offering Gen 5 over 28 lanes and the EPYC offering Gen 4 over 128 lanes. The Ryzen includes integrated Radeon 610M graphics, while the EPYC has no integrated graphics. The sockets are incompatible: the Ryzen uses AMD Socket FL1, the EPYC uses AMD Socket SP3. The Ryzen has an unlocked multiplier, whereas the EPYC is locked. The Ryzen was released on 2024-01-16, while the EPYC was released on 2019-08-06.

FAQ

Q: Which processor is faster for single-threaded tasks?

A: The AMD Ryzen 9 7940HX is dramatically faster. In the PassMark single-thread test, it scores 3942 versus the EPYC 7352’s 1979, a 99.2% advantage.

Q: Does the EPYC 7352 have more cores?

A: Yes. The EPYC 7352 has 24 cores and 48 threads, compared to the Ryzen 9 7940HX’s 16 cores and 32 threads.

Q: Which processor has better multi-core rendering performance?

A: The EPYC 7352 wins in Cinebench R23 multi-core, scoring 34314 versus the Ryzen 9 7940HX’s 29400, a 14.3% lead.

Q: What are the memory bandwidth differences?

A: The EPYC 7352 has a much higher memory bandwidth of 204.8 GB/s over an eight-channel DDR4 bus, while the Ryzen 9 7940HX has 83.2 GB/s over a dual-channel DDR5 bus.

Q: Does the Ryzen 9 7940HX support ECC memory?

A: No. ECC memory support is exclusive to the EPYC 7352.

Q: Which processor has a higher boost clock?

A: The Ryzen 9 7940HX has a boost clock of 5.20 GHz, significantly higher than the EPYC 7352’s 3.20 GHz.