AMD EPYC 9175F vs AMD Ryzen 9 9955HX3D Comparison

The AMD Ryzen 9 9955HX3D and the AMD EPYC 9175F are both 16-core, 32-thread Zen 5 processors built on TSMC’s 4 nm node, yet they target entirely different segments. The Ryzen 9 is a mobile part for high-end gaming laptops, while the EPYC 9175F is a server/workstation processor. Benchmark data shows the EPYC 9175F wins 11 of 15 head-to-head tests, with the Ryzen 9 9955HX3D taking 4 wins. The EPYC’s average benchmark score of 95615 sits just 1.9% behind the Ryzen 9’s 97453, placing both in the 96th percentile of all CPUs. Their nearest rival lists overlap with the AMD EPYC 4565P, but the two chips diverge sharply on single-core performance, memory bandwidth, and platform capabilities.

FAQ

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 9 9955HX3D boosts to 5.40 GHz, which is 0.40 GHz higher than the EPYC 9175F’s 5.00 GHz boost clock.

Q: How much larger is the EPYC 9175F’s L3 cache compared to the Ryzen 9 9955HX3D?

A: The EPYC 9175F has 512 MB of shared L3 cache, which is four times the 128 MB L3 cache found on the Ryzen 9 9955HX3D.

Q: What is the memory bandwidth difference between the two?

A: The EPYC 9175F delivers 576.0 GB/s via its twelve-channel memory bus, while the Ryzen 9 9955HX3D provides 89.6 GB/s over a dual-channel bus. The EPYC’s bandwidth is more than six times higher.

Q: Which chip wins in Cinebench R23 single-core performance?

A: The EPYC 9175F scores 7895 in Cinebench R23 single-core, a 72.6% advantage over the Ryzen 9 9955HX3D’s 2159.5 score.

Q: Which chip has a higher PassMark single-thread score?

A: The Ryzen 9 9955HX3D leads with a PassMark single-thread score of 4511, which is 6% higher than the EPYC 9175F’s 4256.

Q: What is the launch MSRP of the EPYC 9175F?

A: The EPYC 9175F has a launch MSRP of $4256. The Ryzen 9 9955HX3D has no listed launch MSRP in the data.

Architecture Differences

Both processors share the Zen 5 architecture and TSMC’s 4 nm process, but their physical implementations are dramatically different. The Ryzen 9 9955HX3D uses the Fire Range codename and packs 16,630 million transistors across two 70.6 mm² dies. The EPYC 9175F, codenamed Turin, scales this to 133,040 million transistors spread across sixteen 70.6 mm² dies. This massive transistor count and multi-die design enable the EPYC’s 512 MB shared L3 cache, versus the Ryzen 9’s 128 MB L3. Both have 80 KB L1 and 1 MB L2 per core, but the EPYC’s cache hierarchy is built for server workloads that demand large working sets.

The memory subsystems are entirely different. The Ryzen 9 9955HX3D runs dual-channel DDR5 with 89.6 GB/s bandwidth, while the EPYC 9175F uses twelve-channel DDR5 with 576.0 GB/s. Both support ECC memory. PCIe lane counts also differ: the Ryzen 9 provides Gen 5 with 28 CPU lanes, whereas the EPYC 9175F offers Gen 5 with 128 CPU lanes. The Ryzen 9 integrates a Radeon 610M GPU, while the EPYC has no integrated graphics. The Ryzen 9 uses AMD Socket FL1 and has an unlocked multiplier, while the EPYC 9175F uses AMD Socket SP5 and is locked. The EPYC’s base clock of 4.20 GHz is considerably higher than the Ryzen 9’s 2.50 GHz, though the Ryzen 9 boosts 0.40 GHz higher.

Head-to-Head Benchmarks

The EPYC 9175F dominates multi-core and compute-heavy workloads. In Cinebench R23 multi-core, the EPYC scores 55923 against the Ryzen 9’s 38161.5, a 31.8% lead. Cinebench R15 multi-core tells a different story: the Ryzen 9 wins with 6042.5 versus 5636, a 7.2% margin. This is one of only four wins for the mobile chip. The EPYC’s single-core advantage is massive in Cinebench, scoring 7895 in R23 single-core versus 2159.5 (a 72.6% delta) and 795 in R15 single-core versus 332 (a 58.2% delta). However, in PassMark single-thread, the Ryzen 9 flips the result, scoring 4511 against 4256, a 6% win.

In PassMark productivity tests, the EPYC 9175F shows consistent but modest advantages. Data compression favors the EPYC at 867186 versus 785811, a 9.4% lead. Data encryption shows a 6.7% edge for the EPYC (42297 vs 39446), and extended instructions give the EPYC a 10.9% win (70529 vs 62813). The EPYC also wins random string sorting by 12.8% (95783 vs 83497) and multithread by 7.3% (67634 vs 62674). Physics performance is a clear differentiator: the EPYC scores 9984 versus 4687, a 53.1% blowout. Find prime numbers favors the EPYC by 29.1% (741 vs 525). Floating-point math is nearly tied, with the EPYC at 145939 and the Ryzen 9 at 144122, a 1.2% delta. The Ryzen 9’s only other win besides the two Cinebench R15 multi-core and PassMark single-thread tests is integer math, where it scores 222503 against 219800, a 1.2% edge.

Specification Differences

| Specification | AMD Ryzen 9 9955HX3D | AMD EPYC 9175F |

|---|---|---|

| Base Clock | 2.50 GHz | 4.20 GHz |

| Boost Clock | 5.40 GHz | 5.00 GHz |

| TDP | 55 W | 320 W |

| Socket | AMD Socket FL1 | AMD Socket SP5 |

| Codename | Fire Range | Turin |

| Transistors | 16,630 million | 133,040 million |

| Die Size | 2x 70.6 mm² | 16x 70.6 mm² |

| L3 Cache | 128 MB | 512 MB (shared) |

| Memory Bus | Dual-channel | Twelve-channel |

| Memory Bandwidth | 89.6 GB/s | 576.0 GB/s |

| PCIe | Gen 5, 28 Lanes | Gen 5, 128 Lanes |

| Integrated Graphics | Radeon 610M | N/A |

| Market Segment | Mobile | Server/Workstation |

| Release Date | 2025-01-05 | 2024-10-09 |

| Launch MSRP | None | $4256 |

| Multiplier | Unlocked | Locked |

| Part Number | 100-000001030 | 100-000001145 |

Where Each One Wins

The AMD EPYC 9175F is the clear winner for heavy, sustained server workloads. Its 576.0 GB/s memory bandwidth and 512 MB L3 cache give it decisive advantages in multithreaded rendering, physics simulation, and data compression. The 53.1% physics score lead and 31.8% Cinebench R23 multi-core lead make it the better choice for compute farms, virtualization hosts, and database servers. The EPYC’s 128 PCIe Gen 5 lanes also support massive I/O configurations. Its higher base clock (4.20 GHz) contributes to strong single-core Cinebench results, which are 72.6% ahead in R23. This chip is designed to handle memory-bound and parallel workloads where the Ryzen 9 cannot compete.

The AMD Ryzen 9 9955HX3D wins where power efficiency and raw single-thread responsiveness matter. Despite a 55 W TDP versus the EPYC’s 320 W, the Ryzen 9 manages a 6% PassMark single-thread advantage and a 1.2% integer math win. Its 6% lead in PassMark single-thread is notable given the EPYC’s much higher clock speed. The Ryzen 9 also wins Cinebench R15 multi-core by 7.2%, suggesting that in shorter, bursty workloads, the mobile chip’s higher boost clock (5.40 GHz) can overcome the EPYC’s cache and bandwidth advantages. For gaming laptops or mobile workstations, the Ryzen 9’s integrated Radeon 610M and lower power draw are practical benefits. The unlocked multiplier also allows overclocking, which is impossible on the locked EPYC.

The data shows a clear split: the EPYC 9175F for server-class throughput and the Ryzen 9 9955HX3D for single-threaded tasks and mobile deployments. Both sit in the 96th percentile, but their nearest rival lists reveal different competitive landscapes. The Ryzen 9’s closest rival is the AMD Ryzen Threadripper PRO 5965WX with a 1.1% delta, while the EPYC 9175F’s nearest is the EPYC 4565P at a 0.2% delta. This indicates the EPYC operates in a tighter performance band among server chips, whereas the Ryzen 9 has a slightly wider gap to its nearest competitor.