AMD EPYC 7513 vs AMD Ryzen 9 9955HX3D Comparison

Head-to-Head Benchmarks

The benchmark data reveals a clear split: the AMD EPYC 7513 wins 9 of the 15 head-to-head tests, while the AMD Ryzen 9 9955HX3D takes 6. The margins, however, tell a more nuanced story than the raw win count.

The EPYC 7513’s most dominant victories come in single-core rendering workloads. In Cinebench R23 single-core, the EPYC scores 7119 against the Ryzen’s 2159.5, a 229.7% advantage. Similarly, in Cinebench R15 single-core, the EPYC posts 717 versus 332, a 116% lead. These are staggering margins, suggesting the EPYC’s architecture handles legacy single-threaded rendering far better than the Ryzen’s newer design in this specific test environment.

Multi-core rendering flips the script in one test but not the other. In Cinebench R23 multi-core, the EPYC wins decisively: 50431 versus 38161.5, a 32.2% advantage. Yet in Cinebench R15 multi-core, the Ryzen 9 9955HX3D takes the win with 6042.5 against 5083, a 15.9% margin. This inconsistency suggests workload scaling differences between the two Cinebench versions.

Data compression and encryption are clear EPYC strengths. PassMark data compression shows the EPYC at 932240 versus 785811, an 18.6% lead. Data encryption is even more lopsided: 63628 versus 39446, a 61.3% advantage. Integer math also favors the EPYC: 272145 versus 222503, a 22.3% margin. Random string sorting goes to the EPYC at 104660 versus 83497, a 25.3% lead.

The Ryzen 9 9955HX3D fights back in several PassMark subtests. Extended instructions favor the Ryzen: 62813 versus 56451, a 10.1% margin. Find prime numbers goes to the Ryzen at 525 versus 380, a 27.6% lead. Floating point math is close, with the EPYC edging out 151713 versus 144122, just 5.3% ahead.

Single-thread PassMark results strongly favor the Ryzen: 4511 versus 2479, a 45% margin. This is reflected in the PassMark multithread score, where the Ryzen wins 62674 versus 59331, a 5.3% advantage. Physics goes to the EPYC at 5118 versus 4687, a 9.2% lead.

Where Each One Wins

The EPYC 7513 is the clear winner for sustained multi-core server workloads. Its Cinebench R23 multi-core score of 50431 sits 32.2% above the Ryzen’s 38161.5, and its data encryption score of 63628 is 61.3% higher. The 22.3% lead in integer math and 25.3% advantage in random string sorting reinforce this pattern. The EPYC’s 18.6% edge in data compression also points to database and archival workloads as natural fits.

The Ryzen 9 9955HX3D dominates in single-thread PassMark tests, scoring 4511 versus 2479, a 45% lead. Its extended instructions score of 62813 is 10.1% higher, and its prime number finding is 27.6% faster. The Ryzen also wins the Cinebench R15 multi-core test by 15.9%, suggesting it handles shorter, bursty multi-threaded tasks well. Its PassMark multithread win of 5.3% indicates good overall parallel throughput for a 16-core part.

For workloads, the EPYC suits long-running server tasks: encryption, compression, integer-heavy processing, and sustained multi-core rendering. The Ryzen fits interactive or latency-sensitive tasks: single-threaded applications, extended instruction sets, and workloads that benefit from high per-core throughput. The 5.3% floating point win for the EPYC is marginal, so neither chip has a commanding advantage there.

Architecture Differences

The EPYC 7513 uses Zen 3 architecture on a 7 nm TSMC process, codenamed Milan. It packs 32 cores and 64 threads on an 8x 81 mm² die configuration with 33,200 million transistors. The Ryzen 9 9955HX3D uses Zen 5 on a 4 nm TSMC process, codenamed Fire Range, with 16 cores and 32 threads across 2x 70.6 mm² dies totaling 16,630 million transistors.

Cache layouts differ significantly. The EPYC provides 64 KB of L1 per core, 512 KB of L2 per core, and 128 MB of shared L3. The Ryzen offers 80 KB of L1 per core, 1 MB of L2 per core, and 128 MB of L3. Despite the same L3 capacity, the per-core cache hierarchy favors the Ryzen’s newer design.

Memory support diverges completely. The EPYC uses DDR4 with an eight-channel bus and 204.8 GB/s bandwidth. The Ryzen uses DDR5 with a dual-channel bus and 89.6 GB/s bandwidth. Both support ECC memory. PCIe generations also differ: the EPYC offers Gen 4 with 128 lanes (CPU only), while the Ryzen provides Gen 5 with 28 lanes (CPU only).

The EPYC’s base clock is 2.60 GHz with a boost of 3.65 GHz, while the Ryzen runs at 2.50 GHz base and 5.40 GHz boost. The TDP gap is substantial: 200 W for the EPYC versus 55 W for the Ryzen. The Ryzen includes Radeon 610M integrated graphics; the EPYC has none. The Ryzen has an unlocked multiplier; the EPYC does not.

FAQ

Q: Which CPU has a higher average benchmark score?

A: The EPYC 7513 averages 102244 across all benchmarks, while the Ryzen 9 9955HX3D averages 97453. The EPYC sits at the 97th percentile of all CPUs, and the Ryzen at the 96th.

Q: How do these chips compare to their nearest rivals?

A: The EPYC 7513’s closest rival is the AMD EPYC 8324P at 103329 average score, which is 1.1% higher. The Ryzen 9 9955HX3D’s nearest rival is the AMD Ryzen Threadripper PRO 5965WX at 98504, which is 1.1% higher.

Q: Which chip has better single-thread Cinebench performance?

A: The EPYC 7513 dominates in both Cinebench R15 and R23 single-core tests. It scores 717 versus 332 in R15 (116% higher) and 7119 versus 2159.5 in R23 (229.7% higher).

Q: Does the Ryzen 9 9955HX3D win any benchmark by a large margin?

A: Yes, PassMark single-thread shows the Ryzen at 4511 versus 2479, a 45% lead. It also wins find prime numbers by 27.6% and Cinebench R15 multi-core by 15.9%.

Q: What memory bandwidth does each chip support?

A: The EPYC 7513 supports eight-channel DDR4 with 204.8 GB/s bandwidth. The Ryzen 9 9955HX3D supports dual-channel DDR5 with 89.6 GB/s bandwidth.

Q: Which chip has more PCIe lanes?

A: The EPYC 7513 provides Gen 4 with 128 lanes (CPU only). The Ryzen 9 9955HX3D provides Gen 5 with 28 lanes (CPU only).

Specification Differences

| Specification | AMD EPYC 7513 | AMD Ryzen 9 9955HX3D |

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

| Cores | 32 | 16 |

| Threads | 64 | 32 |

| Base Clock | 2.60 GHz | 2.50 GHz |

| Boost Clock | 3.65 GHz | 5.40 GHz |

| TDP | 200 W | 55 W |

| Socket | AMD Socket SP3 | AMD Socket FL1 |

| Architecture | Zen 3 | Zen 5 |

| Codename | Milan | Fire Range |

| Process Node | 7 nm | 4 nm |

| Transistors | 33,200 million | 16,630 million |

| Die Size | 8x 81 mm² | 2x 70.6 mm² |

| L1 Cache | 64 KB (per core) | 80 KB (per core) |

| L2 Cache | 512 KB (per core) | 1 MB (per core) |

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

| Memory Support | DDR4 | DDR5 |

| Memory Bus | Eight-channel | Dual-channel |

| Memory Bandwidth | 204.8 GB/s | 89.6 GB/s |

| PCIe | Gen 4, 128 Lanes | Gen 5, 28 Lanes |

| Integrated Graphics | None | Radeon 610M |

| Market Segment | Server/Workstation | Mobile |

| Release Date | 2021-03-14 | 2025-01-05 |

| Launch MSRP | $2840 | Not available |

| Multiplier Unlocked | No | Yes |

| Part Number | 100-000000334100-100000334WOF | 100-000001030 |

The Verdict

The data supports a clear recommendation based on workload type. The AMD EPYC 7513 is the choice for server and workstation deployments requiring maximum parallel throughput. Its 32 cores and 64 threads deliver 32.2% higher Cinebench R23 multi-core scores, 61.3% higher encryption performance, and 22.3% higher integer math versus the Ryzen. The 204.8 GB/s memory bandwidth and 128 PCIe Gen 4 lanes make it suited for memory-intensive and I/O-heavy server roles. The 97th percentile ranking and 102244 average benchmark score confirm its position as a top-tier server processor.

The AMD Ryzen 9 9955HX3D is the pick for single-threaded and latency-sensitive applications. Its 45% lead in PassMark single-thread, 27.6% advantage in prime number finding, and 10.1% edge in extended instructions demonstrate superior per-core performance. The 5.40 GHz boost clock and 55 W TDP make it a highly efficient mobile processor. The 96th percentile ranking and 97453 average score show it competes well despite having half the cores.

The EPYC 7513’s 9 wins versus the Ryzen’s 6 wins in head-to-head tests, combined with its higher average score and percentile, make it the stronger overall performer in this comparison. However, the Ryzen’s wins in single-thread PassMark and its Cinebench R15 multi-core victory show it is not simply outclassed. The choice reduces to workload: sustained multi-core server tasks favor the EPYC; bursty, single-threaded, or efficiency-focused mobile tasks favor the Ryzen.