AMD EPYC 4465P vs AMD EPYC 9184X Comparison
AMD EPYC 4465P
EPYC 9184X
PERFORMANCE BENCHMARKS
Analysis: AMD EPYC 4465P vs AMD EPYC 9184X
The AMD EPYC 9184X and AMD EPYC 4465P represent two distinct philosophies within AMD’s server lineup. The 9184X is a flagship Genoa-X part built for maximum cache and platform bandwidth, while the 4465P is a modern, efficient Grado chip aimed at high-frequency responsiveness. Benchmark data shows the 4465P wins the majority of head-to-head tests (11 vs 6), but the 9184X dominates in specific memory-sensitive and multi-threaded physics workloads. The choice hinges entirely on application priorities.
The Verdict
The data clearly separates these two processors by workload type. The AMD EPYC 4465P is the superior choice for general-purpose compute, single-threaded responsiveness, and floating-point/integer math throughput. It leads the 9184X in every Cinebench test, with a consistent 5.6% advantage across R15, R20, and R23 in both single-core and multi-core runs. In PassMark’s integer math, it scores 174551 versus 157483, a 9.8% lead, and similar margins appear in floating-point math (105833 vs 95476). Its single-thread PassMark score of 4575 towers over the 9184X’s 2822, a 38.3% gap that makes it the clear pick for lightly-threaded, latency-sensitive tasks.
The AMD EPYC 9184X, however, is the undisputed champion in data-heavy and encryption workloads. It wins PassMark data compression by 6.5% (614873 vs 577210), data encryption by 16.1% (37376 vs 32184), and random string sorting by 18.2% (79913 vs 67597). Its most dramatic victory is in PassMark physics, where it scores 6674 against the 4465P’s 3647 — an 83% advantage. Any server workload that relies heavily on large in-memory datasets or cryptographic operations should favor the 9184X despite its overall benchmark deficit.
Where Each One Wins
The EPYC 4465P wins every Cinebench test and the majority of PassMark tests, making it the default recommendation for software compilation, rendering, and general server virtualization where per-core speed matters. Its 5.40 GHz boost clock versus 4.20 GHz on the 9184X explains its dominance in single-threaded PassMark (4575 vs 2822) and its 5.6% edge across all Cinebench iterations. The 4465P also leads in PassMark multithread (49871 vs 47665, +4.4%), confirming that its 12 Zen 5 cores outperform the 9184X’s 16 Zen 4 cores in aggregate throughput for most applications.
The EPYC 9184X owns niche but critical workloads. Its 768 MB shared L3 cache dwarfs the 4465P’s 64 MB, which directly fuels its 83% physics win and 37.6% lead in find prime numbers (465 vs 338). The 9184X also excels in data compression, encryption, and string sorting, all of which benefit from its massive cache and twelve-channel memory bus. For database workloads with large working sets or real-time analytics, the 9184X is the data-driven choice.
Architecture Differences
The two CPUs come from different generations and design points. The EPYC 9184X is built on TSMC’s 5 nm process (codename Genoa-X) and packs 90,160 million transistors across 8x 72 mm² dies. It uses Zen 4 architecture with 16 cores and 32 threads, running at a 3.55 GHz base and 4.20 GHz boost. Its L3 cache is a staggering 768 MB shared, with 64 KB L1 and 1 MB L2 per core. It supports DDR5 over a twelve-channel memory bus, delivering 460.8 GB/s of bandwidth, and provides 128 PCIe Gen 5 lanes. Power is rated at 320 W TDP, and it uses AMD Socket SP5.
The EPYC 4465P is newer, launching on a 4 nm TSMC process (codename Grado) with 16,630 million transistors on 2x 70.6 mm² dies. It uses Zen 5 architecture with 12 cores and 24 threads, clocked at 3.40 GHz base and 5.40 GHz boost. Its cache is much smaller: 80 KB L1 per core, 1 MB L2 per core, and 64 MB shared L3. It also supports DDR5 but only on a dual-channel bus, capping bandwidth at 89.6 GB/s — a fraction of the 9184X’s capacity. It offers just 24 PCIe Gen 5 lanes, but includes integrated Radeon Graphics, a feature the 9184X lacks. Its TDP is remarkably low at 65 W, and it fits the mainstream AMD Socket AM5. Both support ECC memory.
FAQ
Q: Which CPU has the higher boost clock?
A: The AMD EPYC 4465P boosts to 5.40 GHz, while the AMD EPYC 9184X boosts to 4.20 GHz.
Q: How much L3 cache does each processor have?
A: The EPYC 9184X has 768 MB of shared L3 cache, while the EPYC 4465P has 64 MB of shared L3 cache.
Q: Which chip is faster in Cinebench R23 multi-core?
A: The EPYC 4465P scores 42918, beating the EPYC 9184X’s 40515 by 5.6%.
Q: Does the EPYC 4465P have integrated graphics?
A: Yes, it includes Radeon Graphics. The EPYC 9184X does not list any integrated graphics.
Q: What is the memory bandwidth difference?
A: The EPYC 9184X provides 460.8 GB/s via twelve-channel memory, while the EPYC 4465P provides 89.6 GB/s via dual-channel memory.
Q: Which CPU wins in PassMark physics?
A: The EPYC 9184X wins decisively with a score of 6674, an 83% advantage over the EPYC 4465P’s 3647.
Head-to-Head Benchmarks
The EPYC 4465P’s clean sweep of Cinebench tests establishes a consistent performance baseline. In Cinebench R15 multi-core, it scores 4326 versus 4083, a 5.6% lead. The same delta appears in R20 multi-core (18025 vs 17016) and R23 multi-core (42918 vs 40515). Single-core results mirror this pattern: R15 single-core shows 610 vs 576, R20 single-core shows 2544 vs 2401, and R23 single-core shows 6059 vs 5719. Across all six Cinebench tests, the 4465P holds an identical 5.6% advantage, indicating a consistent architectural efficiency gain from Zen 5 over Zen 4.
PassMark results reveal a more complex story. The 4465P wins integer math (174551 vs 157483, +9.8%) and floating-point math (105833 vs 95476, +9.8%), and it takes the multithread test (49871 vs 47665, +4.4%). Its single-thread dominance is stark: 4575 vs 2822, a 38.3% gap. However, the 9184X strikes back in memory-bound tasks. Data compression favors it at 614873 vs 577210 (+6.5%), and data encryption shows a 16.1% lead (37376 vs 32184). Random string sorting goes to the 9184X by 18.2% (79913 vs 67597), and find prime numbers sees it ahead by 37.6% (465 vs 338). The physics test is the biggest outlier, with the 9184X scoring 6674 against 3647 — an 83% margin that likely reflects its superior cache behavior under heavy memory access patterns.
The aggregate benchmark scores tell a similar tale: the 9184X has an average benchmark score of 68202, sitting at the 94th percentile of all CPUs, while the 4465P averages 66925 at the 93rd percentile. Their nearest rivals differ accordingly — the 9184X trades blows with the AMD EPYC 7352 (0.1% delta) and Ryzen Threadripper PRO 5955WX (0.5%), while the 4465P sits near the Intel Core Ultra 5 250K Plus (0.1%) and Intel Xeon 6515P (-0.1%). These placements reinforce the 9184X’s position as a high-end server part and the 4465P as a mainstream workstation contender.