AMD EPYC 4464P vs AMD EPYC 4465P Comparison

Head-to-Head Benchmarks

The benchmark data shows a clear overall victory for the AMD EPYC 4465P, which takes 14 of the 17 head-to-head comparisons. The margin is consistent across most workloads, with the 4465P holding a repeated 6.7% advantage in every Cinebench test, both single-core and multi-core. In Cinebench R23, the 4465P scores 42918 versus 40215 for the 4464P, and in single-core it posts 6059 against 5677. The pattern is identical in R15 and R20, suggesting a uniform architectural uplift rather than workload-specific tuning.

The largest single win for the 4465P comes in PassMark physics, where it scores 3647 against 2873, a 26.9% advantage. Floating point math also shows a substantial gap, with the 4465P at 105833 versus 93090 for the 4464P, a 13.7% difference. Integer math follows at 8.8% ahead, and extended instructions show an 8.9% lead. Single-thread performance in PassMark is 10.3% higher for the 4465P, reinforcing the Cinebench single-core results.

The 4464P does claim three wins, and they are worth examining. The most significant is data encryption, where the 4464P scores 35816 against 32184 for the 4465P, a 10.1% advantage. Random string sorting also favors the 4464P by 3.7%, and find prime numbers shows a narrow 1.5% lead for the older part. These wins are concentrated in specific memory-latency-sensitive or algorithmic workloads, which suggests that the 4464P retains some advantages in particular instruction patterns.

The multithread PassMark score is 5% higher for the 4465P (49871 versus 47514), and data compression is nearly identical, with the 4465P ahead by just 0.5%. Overall, the average benchmark score for the 4465P is 66925, placing it in the 93rd percentile of all CPUs, while the 4464P averages 64823, also in the 93rd percentile. The delta between the two parts is roughly 3.2% on average, but the distribution is uneven: the 4465P dominates in compute-heavy tasks while the 4464P holds its ground in specific memory-bound operations.

Architecture Differences

The two processors share the same core count, thread count, socket, and TDP, but they differ fundamentally in silicon. The AMD EPYC 4465P is built on Zen 5 architecture, codenamed Grado, and fabricated on a 4 nm process at TSMC. The AMD EPYC 4464P uses Zen 4 architecture, codenamed Raphael, on a 5 nm process, also at TSMC. This process shrink contributes to the 4465P's higher efficiency and clock-for-clock performance.

The 4465P packs 16,630 million transistors across a dual-chip design with each die measuring 70.6 mm². The 4464P has 13,140 million transistors on two 71 mm² dies. The smaller process node allows the 4465P to fit more transistors into a similar physical footprint, which explains its higher transistor count despite comparable die sizes.

Cache hierarchies differ in the L1 and L2 levels. The 4465P has 80 KB of L1 cache per core, while the 4464P has 64 KB per core. L2 cache is identical at 1 MB per core, and both share 64 MB of L3 cache. The larger L1 cache on the 4465P likely contributes to its single-thread performance advantage, as more data can be held closer to the execution cores.

Memory support is DDR5 for both, but the 4465P achieves a memory bandwidth of 89.6 GB/s versus 83.2 GB/s for the 4464P, a 7.7% increase. Both use dual-channel memory buses. PCIe lane counts differ: the 4465P provides 24 Gen 5 lanes from the CPU, while the 4464P offers 28 Gen 5 lanes. This is a notable difference for systems that require more direct PCIe connectivity for storage or accelerators.

Base clocks differ as well. The 4464P has a higher base clock of 3.70 GHz, while the 4465P runs at 3.40 GHz. Both boost to 5.40 GHz. The lower base clock on the 4465P is offset by the architectural improvements and the larger L1 cache, which allows it to outperform the 4464P despite the frequency disadvantage at idle or lightly threaded loads. Both processors include Radeon Graphics as integrated graphics and support ECC memory.

Where Each One Wins

The AMD EPYC 4465P is the clear choice for compute-intensive workloads. Its wins in Cinebench multi-core, floating point math, integer math, extended instructions, and physics point to a processor that excels in scientific computing, rendering, and general number crunching. The 26.9% lead in physics is particularly striking, suggesting that simulation workloads will see a meaningful uplift. The consistent 6.7% Cinebench advantage across all versions indicates that both short and long rendering tasks benefit equally.

The 4465P also dominates single-thread performance, with a 10.3% lead in PassMark single-thread and 6.7% in Cinebench single-core. This makes it the better option for lightly threaded applications, database queries, or any workload where per-core performance matters. The larger L1 cache and Zen 5 architecture clearly deliver tangible single-core gains.

The AMD EPYC 4464P has a narrower but real set of strengths. Its 10.1% win in data encryption shows that cryptographic workloads, which often rely on specific instruction sequences and memory access patterns, still favor the older architecture. Random string sorting, a workload sensitive to memory latency and branch prediction, shows a 3.7% advantage for the 4464P. The find prime numbers test, which stresses integer division and loop efficiency, also goes to the 4464P by 1.5%.

For mixed workloads, the 4465P is the safer bet. Its multithread score is 5% higher, and data compression is essentially tied. The 4464P does offer more PCIe lanes (28 versus 24), which matters for systems with many NVMe drives or multiple GPUs. The higher base clock of 3.70 GHz on the 4464P could also provide a slight edge in sustained all-core loads that do not boost, though the benchmark data does not show this translating into wins.

Specification Differences

The table below lists only the fields where the two processors differ according to the recorded data.

| Specification | AMD EPYC 4465P | AMD EPYC 4464P |

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

| Architecture | Zen 5 | Zen 4 |

| Codename | Grado | Raphael |

| Process Node | 4 nm | 5 nm |

| Transistors | 16,630 million | 13,140 million |

| Die Size | 2x 70.6 mm² | 2x 71 mm² |

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

| Base Clock | 3.40 GHz | 3.70 GHz |

| Memory Bandwidth | 89.6 GB/s | 83.2 GB/s |

| PCIe Lanes | Gen 5, 24 Lanes (CPU only) | Gen 5, 28 Lanes (CPU only) |

| Release Date | 2025-05-12 | 2024-05-20 |

| Launch MSRP | $399 | $429 |

| Part Number | 100-000001558 | 100-000001478 |

Both parts share the same core count (12), threads (24), boost clock (5.40 GHz), TDP (65 W), socket (AM5), L2 cache (1 MB per core), L3 cache (64 MB), memory type (DDR5), memory bus (dual-channel), ECC support, integrated graphics (Radeon Graphics), market segment (server/workstation), production status (active), and locked multiplier.

The 4465P is the newer part, released roughly a year after the 4464P. It is built on a more advanced process, has a larger L1 cache, and delivers higher memory bandwidth. The 4464P counters with a higher base clock, more PCIe lanes, and a lower transistor count, which may translate to different thermal or power characteristics under specific loads, though the TDP is identical at 65 W.

FAQ

Q: Which processor has a higher single-core benchmark score?

A: The AMD EPYC 4465P leads in all single-core tests. It scores 4575 in PassMark single-thread versus 4146 for the 4464P, a 10.3% advantage, and 6059 in Cinebench R23 single-core versus 5677, a 6.7% lead.

Q: What is the biggest performance gap between the two chips?

A: The largest difference is in PassMark physics, where the 4465P scores 3647 against 2873 for the 4464P, a 26.9% advantage. The 4464P's largest win is in data encryption, where it leads by 10.1% (35816 versus 32184).

Q: Do both processors support ECC memory?

A: Yes, both the AMD EPYC 4465P and the AMD EPYC 4464P support ECC memory. They also both support DDR5 memory and use a dual-channel memory bus.

Q: How do the two chips compare in multi-threaded workloads?

A: The 4465P wins all multi-threaded Cinebench tests by 6.7%, scoring 42918 in R23 versus 40215 for the 4464P. In PassMark multithread, the 4465P leads by 5% (49871 versus 47514).

Q: Which processor has more PCIe lanes?

A: The AMD EPYC 4464P provides 28 Gen 5 lanes from the CPU, while the AMD EPYC 4465P provides 24 Gen 5 lanes. Both use PCIe Gen 5.

Q: Are the two processors in the same performance percentile?

A: Yes, both the 4465P and the 4464P are in the 93rd percentile of all CPUs. The 4465P has a higher average benchmark score at 66925, compared to 64823 for the 4464P.