AMD EPYC 7F72 vs AMD Ryzen 9 9955HX Comparison

Head-to-Head Benchmarks

The head-to-head results split cleanly along workload type, with the AMD Ryzen 9 9955HX dominating single-thread and math-intensive tasks, while the AMD EPYC 7F72 takes the lead in multi-core rendering and data-heavy operations. The Ryzen 9 wins 7 of the 15 recorded tests, while the EPYC 7F72 wins 8.

The most dramatic victory for the Ryzen 9 9955HX comes in single-thread performance. In PassMark single-thread, it scores 4393 against the EPYC's 2384, a massive 84.3% advantage. The same gap appears in Cinebench R23 single-core, where the Ryzen 9 scores 2174 versus the EPYC's 6328, but here the EPYC wins by 65.6%. This inversion is striking: the EPYC 7F72's Cinebench single-core score is nearly triple the Ryzen's, yet the PassMark single-thread test shows the opposite relationship. The data suggests these two processors have very different microarchitectural strengths, with the Ryzen 9's Zen 5 design favoring the PassMark workload while the EPYC's Zen 2 design excels in Cinebench's rendering pipeline.

In floating-point math, the Ryzen 9 9955HX posts 136682 to the EPYC's 108437, a 26% win. Integer math also favors the Ryzen, at 212598 versus 181103, a 17.4% margin. The PassMark multithread score goes to the Ryzen as well, 56171 versus 52740, a narrower 6.5% edge. Extended instructions are another Ryzen win, 57946 versus 46936, a 23.5% advantage.

The EPYC 7F72's wins are concentrated in memory-heavy and physics workloads. PassMark physics shows the EPYC at 6459 against the Ryzen's 2720, a 57.9% lead. Data compression goes to the EPYC, 808795 versus 731998, a 9.5% gap. Data encryption favors the EPYC by 33.6%, 56261 versus 37330. Random string sorting is an EPYC win at 102436 versus 77890, a 24% margin. Find prime numbers goes to the EPYC, 498 versus 287, a 42.4% lead.

The Cinebench R23 multicore result is notable: the EPYC 7F72 wins with 44829 against the Ryzen's 37159, a 17.1% advantage, despite the Ryzen 9 winning the PassMark multithread test. This divergence highlights how benchmark design shapes outcomes. In Cinebench R15 multicore, the Ryzen 9 wins decisively, 5905 versus 4518, a 30.7% margin. The Cinebench R15 single-core test goes to the EPYC, 637 versus 336, a 47.3% lead.

Architecture Differences

The two processors come from different eras of AMD design. The Ryzen 9 9955HX uses the Zen 5 architecture on a 4 nm TSMC process, with the codename Fire Range and a 16,630 million transistor count spread across a 2x 70.6 mm² die. The EPYC 7F72 uses Zen 2 on a 7 nm TSMC process, codenamed Rome, with 3,800 million transistors on a 74 mm² die. The process node difference is significant, with the Ryzen 9 using a more advanced 4 nm node.

Core counts differ substantially. The Ryzen 9 has 16 cores and 32 threads, while the EPYC 7F72 has 24 cores and 48 threads. The EPYC brings 50% more cores and 50% more threads. Cache configurations also diverge. The Ryzen 9 has 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3. The EPYC 7F72 has 96 KB of L1 per core, 512 KB of L2 per core, and 192 MB of shared L3. The EPYC's L3 cache is three times larger, which helps explain its data compression and random string sorting wins.

Memory architecture is a major differentiator. The Ryzen 9 supports DDR5 on a dual-channel bus with 89.6 GB/s bandwidth. The EPYC 7F72 supports DDR4 on an eight-channel bus with 204.8 GB/s bandwidth, more than double the memory bandwidth. Both support ECC memory. The EPYC's PCIe implementation is Gen 4, while the Ryzen 9 offers Gen 5 with 28 lanes (CPU only). The EPYC has no integrated graphics, while the Ryzen 9 includes a Radeon 610M.

Clock speeds tell a story of different design goals. The Ryzen 9 has a 2.50 GHz base clock and a 5.40 GHz boost clock, reflecting a mobile-oriented, high-frequency design. The EPYC 7F72 has a 3.20 GHz base and 3.70 GHz boost, lower boost but higher base. The Ryzen 9 has an unlocked multiplier, while the EPYC is locked. The Ryzen 9's TDP is 55, the EPYC's is 240. The Ryzen 9 uses AMD Socket FL1 and targets the mobile segment, while the EPYC uses AMD Socket SP3 for server and workstation use. The EPYC launched on 2020-04-13, while the Ryzen 9 launched on 2025-01-05.

The Verdict

The benchmark data points to a clear specialization. The AMD Ryzen 9 9955HX is the stronger choice for single-thread responsiveness and math-heavy workloads. Its 84.3% lead in PassMark single-thread and 26% lead in floating-point math make it the pick for applications that depend on per-core speed. The unlocked multiplier and 5.40 GHz boost clock support this profile.

The AMD EPYC 7F72 is the better option for memory-intensive server workloads. Its 57.9% lead in physics, 42.4% lead in prime number finding, and 33.6% lead in data encryption point to a processor built for sustained throughput with high memory bandwidth. The 204.8 GB/s memory bandwidth and 192 MB of L3 cache are the architectural foundations for these wins.

For Cinebench R23 multicore rendering, the EPYC wins by 17.1%, but for Cinebench R15 multicore, the Ryzen 9 wins by 30.7%. The inconsistency means neither processor is universally faster in multi-core rendering. The PassMark multithread test gives the Ryzen 9 a 6.5% edge. The average benchmark score favors the Ryzen 9, at 91199 versus 85072, a difference reflected in their nearest rivals: the Ryzen 9 sits 0.5% above the Intel Xeon 654, while the EPYC 7F72 sits 1.3% above the Intel Core Ultra 9 290K Plus. Both processors rank at the 96th percentile among all CPUs.

FAQ

Q: Which processor has higher single-thread performance?

A: The AMD Ryzen 9 9955HX wins PassMark single-thread with 4393 versus 2384, an 84.3% advantage. However, the EPYC 7F72 wins Cinebench R23 single-core with 6328 versus 2174, a 65.6% lead.

Q: Which processor has more cores and threads?

A: The AMD EPYC 7F72 has 24 cores and 48 threads. The AMD Ryzen 9 9955HX has 16 cores and 32 threads.

Q: Which processor has more L3 cache?

A: The AMD EPYC 7F72 has 192 MB of shared L3 cache. The AMD Ryzen 9 9955HX has 64 MB of shared L3 cache.

Q: Which processor has higher memory bandwidth?

A: The AMD EPYC 7F72 has 204.8 GB/s memory bandwidth on an eight-channel DDR4 bus. The AMD Ryzen 9 9955HX has 89.6 GB/s on a dual-channel DDR5 bus.

Q: Which processor wins in data encryption?

A: The AMD EPYC 7F72 wins PassMark data encryption with 56261 versus 37330, a 33.6% margin.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 9 9955HX has a boost clock of 5.40 GHz. The AMD EPYC 7F72 has a boost clock of 3.70 GHz.

Where Each One Wins

The AMD Ryzen 9 9955HX wins in single-thread PassMark, floating-point math, integer math, extended instructions, multithread PassMark, and Cinebench R15 multicore. These results make it the choice for desktop-style workloads, development environments, and applications that scale with high per-core frequency. The 84.3% single-thread lead is the standout, indicating a processor that responds quickly to interactive requests.

The AMD EPYC 7F72 wins in Cinebench R23 multicore, Cinebench R23 single-core, Cinebench R15 single-core, data compression, data encryption, prime number finding, physics, and random string sorting. These are workload types that benefit from more cores, larger cache, and higher memory bandwidth. The physics win at 57.9% and the prime number win at 42.4% show a processor that sustains heavy computational loads. The 192 MB L3 cache and 204.8 GB/s memory bandwidth are the clear advantages here.

Specification Differences

The AMD Ryzen 9 9955HX has 16 cores and 32 threads, while the AMD EPYC 7F72 has 24 cores and 48 threads. The Ryzen 9 has a base clock of 2.50 GHz and a boost clock of 5.40 GHz. The EPYC has a base clock of 3.20 GHz and a boost clock of 3.70 GHz. TDP is 55 for the Ryzen 9 and 240 for the EPYC. The Ryzen 9 uses AMD Socket FL1, the EPYC uses AMD Socket SP3.

Architecture differs: Zen 5 (Fire Range) for the Ryzen 9, Zen 2 (Rome) for the EPYC. Process node is 4 nm for the Ryzen 9, 7 nm for the EPYC. Transistor count is 16,630 million for the Ryzen 9, 3,800 million for the EPYC. Die size is 2x 70.6 mm² for the Ryzen 9, 74 mm² for the EPYC. L1 cache is 80 KB per core for the Ryzen 9, 96 KB per core for the EPYC. L2 cache is 1 MB per core for the Ryzen 9, 512 KB per core for the EPYC. L3 cache is 64 MB shared for the Ryzen 9, 192 MB shared for the EPYC.

Memory support is DDR5 for the Ryzen 9, DDR4 for the EPYC. Memory bus is dual-channel for the Ryzen 9, eight-channel for the EPYC. Memory bandwidth is 89.6 GB/s for the Ryzen 9, 204.8 GB/s for the EPYC. PCIe is Gen 5 with 28 lanes for the Ryzen 9, Gen 4 for the EPYC. The Ryzen 9 has integrated Radeon 610M graphics, the EPYC has none. The Ryzen 9 has an unlocked multiplier, the EPYC does not. The Ryzen 9 targets mobile, the EPYC targets server and workstation.