AMD EPYC 4584PX vs AMD Ryzen AI Max+ 395 Comparison

The Verdict

The data splits this comparison into two very distinct personas. The AMD EPYC 4584PX is the raw throughput champion for sustained, multi-threaded server workloads. It wins 10 of the 15 head-to-head benchmarks and takes the decisive Cinebench R23 multi-core test by a massive 45.9% margin. Its 96th percentile ranking versus all CPUs, combined with an average benchmark score of 83,090, places it just 0.9% behind the Intel Core Ultra 9 285K and 1.1% behind the Intel Core Ultra 9 290K Plus, making it a top-tier compute part.

The AMD Ryzen AI Max+ 395 is a different beast. Despite its 55W TDP, it nearly matches the EPYC in several synthetic workloads, winning the PassMark single-thread test by 8.5% and the floating-point math test by 5.6%. Its 95th percentile ranking and average score of 77,740 put it just 1.6% ahead of the AMD Ryzen Threadripper PRO 9945WX and 1.6% ahead of the AMD EPYC Embedded 8224P. This is a mobile-first processor that delivers remarkable capability within a dramatically lower power envelope.

For a database, server, or heavy multi-threaded rendering node, the EPYC 4584PX is the clear choice. For a workstation or high-end mobile system where the integrated Radeon 8060S and quad-channel LPDDR5X memory bandwidth (256.0 GB/s) matter, the Ryzen AI Max+ 395 is the better fit. The data does not support picking the Ryzen for raw CPU rendering volume, but does support it for efficiency and single-thread responsiveness in a portable context.

Architecture Differences

The two processors come from different worlds within AMD's lineup. The EPYC 4584PX is built on the Zen 4 architecture, codenamed Raphael, and is part of the EPYC 4004 series. It uses a 5 nm process at TSMC with 17,840 million transistors across a dual-die design (2x 71 mm²). It runs on the AMD Socket AM5 platform, which is a desktop-derived socket, and its base clock is 4.20 GHz with a boost clock of 5.70 GHz. Its TDP is 120 W, and it supports DDR5 memory over a dual-channel bus, yielding 83.2 GB/s of bandwidth. It also has 128 MB of shared L3 cache, which includes a 1x 64MB V-Cache slice, and a 64 KB L1 cache per core with 1 MB L2 per core.

The Ryzen AI Max+ 395 is built on the newer Zen 5 architecture, codenamed Strix Halo, from the Ryzen AI Max generation. It is fabricated on a 4 nm process at TSMC, with a die size of 2x 70.6 mm². It installs into Socket FP11, a mobile platform, and has a much lower base clock of 3.00 GHz and boost clock of 5.10 GHz. Its TDP is just 55W. Memory support is LPDDR5X, running on a quad-channel bus, which gives it a massive 256.0 GB/s of bandwidth, three times the EPYC's figure. It also has 64 MB of shared L3 cache, but no V-Cache, and a larger L1 cache of 80 KB per core. The Ryzen chip also includes a Radeon 8060S integrated graphics solution, while the EPYC has only basic Radeon Graphics.

The EPYC has 28 lanes of PCIe Gen 5, versus the Ryzen's 16 lanes of PCIe Gen 4. Both support ECC memory. The EPYC is a server/workstation part, active since May 2024, while the Ryzen is a mobile part, active since January 2025. Neither has an unlocked multiplier. The EPYC's architecture brings a higher clock ceiling and more L3 cache, while the Ryzen brings a newer core, lower power draw, and far superior memory bandwidth.

Head-to-Head Benchmarks

The Cinebench results are the most telling. In Cinebench R23 multi-core, the EPYC 4584PX scores 51,524 versus the Ryzen's 35,314, a 45.9% lead. This is a decisive victory for sustained all-core workloads. In Cinebench R23 single-core, the EPYC is even more dominant, scoring 7,274 to the Ryzen's 2,044, a 255.9% advantage. That is a massive gap. In the older Cinebench R15 multi-core test, the Ryzen actually wins, scoring 5,463 to the EPYC's 5,193, a 4.9% edge. However, in R15 single-core, the EPYC wins by 132%, scoring 733 to the Ryzen's 316.

PassMark tests show a mixed picture. The EPYC wins data compression (741,648 vs 690,650, 7.4% ahead) and data encryption (45,902 vs. 35,455, 29.5% ahead). It also wins in find prime numbers (441 vs. 303, 45.5% ahead), physics (4,574 vs. 3,481, 31.4% ahead), random string sorting (87,690 vs. 76,177, 15.1% ahead), and multi-thread (58,117 vs. 54,934, 5.8% ahead). The Ryzen wins extended instructions (56,346 vs. 53,774, 4.6% ahead) and floating point math (128,682 vs. 121,460, 5.6% ahead). In integer math, the EPYC wins by a razor-thin 0.6% (201,919 vs. 200,665). For single-thread, the Ryzen wins by 8.5% (4,147 vs. 3,795).

The Ryzen's aggregate average score of 77,740 is about 6.4% lower than the EPYC's 83,090. The Ryzen's nearest rival, the Intel Core i9-14900K, is 1.7% ahead of it, while the EPYC's nearest rival, the AMD EPYC 9135, is only 0.1% behind it. The Ryzen also trails the AMD Ryzen 9 8945HX by 2% in its rival list.

FAQ

Q: Which processor is better for multi-core rendering?

A: The EPYC 4584PX. It leads by 45.9% in Cinebench R23 multi-core and by 5.8% in PassMark multi-thread. Its Cinebench R23 multi-core score is 51,524 versus the Ryzen's 35,314.

Q: Does the Ryzen AI Max+ 395 win any tests?

A: Yes. It wins Cinebench R15 multi-core by 4.9%, PassMark single-thread by 8.5%, PassMark floating point math by 5.6%, and PassMark extended instructions by 4.6%.

Q: How does the memory bandwidth compare?

A: The Ryzen AI Max+ 395 has a quad-channel LPDDR5X bus providing 256.0 GB/s, while the EPYC 4584PX has a dual-channel DDR5 bus providing 83.2 GB/s. The Ryzen has over three times the bandwidth.

Q: Which chip has more cache?

A: The EPYC has 128 MB of shared L3 cache, which includes a 64 MB V-Cache slice. The Ryzen has 64 MB of shared L3 cache. The EPYC also has a 64 KB L1 per core, while the Ryzen has an 80 KB L1 per core. Both have 1 MB of L2 per core.

Q: Which chip has a higher single-core boost clock?

A: The EPYC 4584PX has a boost clock of 5.70 GHz, versus the Ryzen's 5.10 GHz. This aligns with its dominant 255.9% win in Cinebench R23 single-core.

Q: Is the Ryzen AI Max+ 395 better for a mobile workstation?

A: The data supports that. It has a 55 W TDP, a mobile socket (FP11), and a Radeon 8060S integrated GPU. It also has a higher PassMark single-thread score (4,147 vs. 3,795) and wins floating-point math, which can benefit certain professional application workloads.

Where Each One Wins

The AMD EPYC 4584PX wins in raw compute volume. Its Cinebench R23 multi-core score is 45.9% higher, its PassMark physics score is 31.4% higher, and its data encryption is 29.5% higher. It also dominates in find prime numbers by 45.5%, random string sorting by 15.1%, and data compression by 7.4%. For a server consolidating virtual machines, a rendering farm, or any workload that scales across its 16 cores and 32 threads, the EPYC is the winner. Its 128 MB of L3 cache is also a distinct advantage for cache-sensitive database queries.

The AMD Ryzen AI Max+ 395 wins in efficiency and memory-bound tasks. Its 256.0 GB/s of memory bandwidth is a massive advantage for GPU-class compute or in-memory analytics. It also wins the single-thread PassMark test by 8.5%, meaning it feels more responsive for light, single-threaded tasks. Its floating point math win by 5.6% indicates a strength in scientific or simulation workloads that use SIMD instructions. With its 55 W TDP, it is designed for high-performance mobile systems where power is at a premium and the need for a discrete GPU is eliminated by the Radeon 8060S. For a content creation laptop or a compact workstation, the Ryzen AI Max+ 395 is the better platform. The EPYC, in contrast, is a plug-in for a server rack, not a laptop.

The data shows a clean split: the EPYC 4584PX is the compute-density leader, and the Ryzen AI Max+ 395 is the bandwidth-and-efficiency leader. The choice comes down to the physical platform, as the EPYC's AM5 socket and server segment versus the Ryzen's FP11 socket and mobile segment are not interchangeable.