AMD Ryzen 9 8945HX vs AMD Ryzen AI Max+ 395 Comparison

The AMD Ryzen AI Max+ 395 and AMD Ryzen 9 8945HX are both 16-core mobile processors, but they are fundamentally different designs. The data shows a split decision: the AI Max+ 395 dominates in most PassMark workloads, while the 8945HX delivers a decisive victory in Cinebench tests. The average benchmark scores are nearly identical—77,740 for the AI Max+ 395 versus 76,212 for the 8945HX, a 2% difference—yet the nature of their wins reveals distinct architectural priorities.

Head-to-Head Benchmarks

The most striking result is the Cinebench single-core disparity. The 8945HX scores 6,030 in Cinebench R23 single-core, which is 66.1% higher than the AI Max+ 395’s 2,044. This is not a marginal gap; it is a generational chasm in single-threaded performance. The Cinebench R15 single-core test tells the same story, with the 8945HX at 607 versus 316 for the AI Max+ 395, a 47.9% advantage. These results indicate that the 8945HX’s higher boost clock of 5.40 GHz, compared to 5.10 GHz for the AI Max+ 395, translates directly into superior single-threaded responsiveness.

Multi-core Cinebench results are more nuanced. The 8945HX also wins Cinebench R23 multi-core, scoring 42,713 against 35,314 for the AI Max+ 395—a 17.3% lead. However, the AI Max+ 395 takes Cinebench R15 multi-core with 5,463 versus 4,305, a 26.9% advantage. This reversal suggests the two processors have different performance scaling characteristics under sustained versus burst workloads. The 8945HX’s Zen 4 architecture appears better suited to the longer R23 render, while the AI Max+ 395’s Zen 5 design excels in the shorter R15 test.

The PassMark suite paints a different picture entirely. The AI Max+ 395 wins 10 of the 15 head-to-head benchmarks. Its largest victory comes in PassMark physics, where it scores 3,481 against 2,168 for the 8945HX—a massive 60.6% lead. This is the biggest single-test margin in the entire comparison. The AI Max+ 395 also leads in extended instructions (56,346 versus 49,823, a 13.1% gain), prime number finding (303 versus 262, a 15.6% gain), and floating-point math (128,682 versus 117,453, a 9.6% gain).

The AI Max+ 395’s PassMark single-thread score of 4,147 beats the 8945HX’s 3,907 by 6.1%, which is surprising given the Cinebench single-core results. This discrepancy highlights that benchmark suites measure different aspects of single-threaded performance. The 8945HX’s wins in PassMark are limited to data encryption (40,836 versus 35,455, a 13.2% lead) and random string sorting (78,781 versus 76,177, a 3.3% lead). The AI Max+ 395 also edges out the 8945HX in data compression (690,650 versus 677,755, a 1.9% gain) and integer math (200,665 versus 195,180, a 2.8% gain).

Architecture Differences

The two processors are built on different Zen generations and process nodes. The AI Max+ 395 uses Zen 5 architecture on a 4 nm TSMC node, while the 8945HX uses Zen 4 on a 5 nm TSMC node. This node advantage partially explains the AI Max+ 395’s efficiency in many PassMark workloads. The AI Max+ 395 has a die size of 2x 70.6 mm², while the 8945HX has a slightly larger 2x 71 mm² die.

Cache configurations differ significantly. The AI Max+ 395 has 80 KB of L1 cache per core, compared to 64 KB per core for the 8945HX. Both have 1 MB of L2 cache per core and 64 MB of shared L3 cache. The larger L1 cache likely contributes to the AI Max+ 395’s advantage in instruction-heavy workloads like extended instructions and prime number calculations.

Memory architecture is a major divergence point. The AI Max+ 395 supports LPDDR5X memory over a quad-channel bus, delivering 256.0 GB/s of bandwidth. The 8945HX uses DDR5 over a dual-channel bus, with 83.2 GB/s bandwidth. This threefold difference in memory bandwidth is the AI Max+ 395’s most significant architectural advantage. The AI Max+ 395 also supports ECC memory, while the 8945HX does not.

PCIe connectivity favors the 8945HX, which offers Gen 5 with 28 lanes versus Gen 4 with 16 lanes for the AI Max+ 395. The 8945HX is unlocked for overclocking, while the AI Max+ 395 is not. The integrated graphics differ as well: the AI Max+ 395 uses a Radeon 8060S, while the 8945HX uses a Radeon 610M. The AI Max+ 395 uses AMD Socket FP11, while the 8945HX uses AMD Socket FL1. The 8945HX has 13,140 million transistors, while the AI Max+ 395’s transistor count is not listed.

Where Each One Wins

The AI Max+ 395 is the clear winner for compute-heavy, memory-bandwidth-sensitive tasks. Its 60.6% lead in PassMark physics suggests it handles simulation and physics calculations far better than the 8945HX. The 13.1% edge in extended instructions and 15.6% lead in prime number finding point to superior performance in cryptography, scientific computing, and integer-heavy workloads. The 9.6% advantage in floating-point math makes it the better choice for financial modeling, engineering simulations, and data analysis. The quad-channel LPDDR5X memory with 256.0 GB/s bandwidth is the likely driver of these wins.

The 8945HX is the winner for single-threaded responsiveness and Cinebench rendering. The 66.1% lead in Cinebench R23 single-core is a decisive metric for users running applications that rely heavily on single-threaded performance, such as older games, legacy software, or lightly threaded productivity tools. The 17.3% lead in Cinebench R23 multi-core indicates it handles sustained multi-threaded rendering workloads, like Blender or video encoding, better than the AI Max+ 395. The 13.2% advantage in data encryption makes it the better choice for encryption-heavy tasks.

For general productivity, the AI Max+ 395 is the better all-rounder. It wins PassMark multithread (54,934 versus 51,405, a 6.9% gain) and PassMark single-thread (4,147 versus 3,907, a 6.1% gain). Its 1.9% lead in data compression and 2.8% lead in integer math suggest it handles common office workloads slightly better. The 8945HX’s 3.3% lead in random string sorting is a niche advantage, likely relevant only for specific database or sorting applications.

FAQ

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 9 8945HX has a boost clock of 5.40 GHz, while the AMD Ryzen AI Max+ 395 has a boost clock of 5.10 GHz.

Q: What is the memory bandwidth difference?

A: The AI Max+ 395 supports quad-channel LPDDR5X with 256.0 GB/s bandwidth, while the 8945HX uses dual-channel DDR5 with 83.2 GB/s bandwidth.

Q: Which CPU is better for single-core performance?

A: The Ryzen 9 8945HX wins Cinebench R23 single-core by 66.1% (6,030 versus 2,044), but the AI Max+ 395 wins PassMark single-thread by 6.1% (4,147 versus 3,907).

Q: Do both processors have the same core and thread count?

A: Yes, both have 16 cores and 32 threads.

Q: Which processor supports ECC memory?

A: Only the AMD Ryzen AI Max+ 395 supports ECC memory; the Ryzen 9 8945HX does not.

Q: What is the process node difference?

A: The AI Max+ 395 is built on a 4 nm TSMC process, while the 8945HX uses a 5 nm TSMC process.

Specification Differences

| Specification | AMD Ryzen AI Max+ 395 | AMD Ryzen 9 8945HX |

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

| Base Clock | 3.00 GHz | 2.50 GHz |

| Boost Clock | 5.10 GHz | 5.40 GHz |

| Socket | AMD Socket FP11 | AMD Socket FL1 |

| Architecture | Zen 5 | Zen 4 |

| Process Node | 4 nm | 5 nm |

| Transistors | Not listed | 13,140 million |

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

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

| Memory Support | LPDDR5X | DDR5 |

| Memory Bus | Quad-channel | Dual-channel |

| Memory Bandwidth | 256.0 GB/s | 83.2 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 4, 16 Lanes | Gen 5, 28 Lanes |

| Integrated Graphics | Radeon 8060S | Radeon 610M |

| Multiplier Unlocked | No | Yes |

| Release Date | 2025-01-05 | 2025-04-22 |

The Verdict

The data supports a clear split recommendation. The AMD Ryzen AI Max+ 395 is the better choice for users who prioritize compute throughput, scientific workloads, and memory-bandwidth-intensive applications. Its 60.6% lead in physics, 13.1% lead in extended instructions, and 9.6% lead in floating-point math, combined with triple the memory bandwidth (256.0 GB/s versus 83.2 GB/s), make it the superior engine for data analysis, simulation, and multi-threaded productivity. Its 6.9% lead in PassMark multithread and 6.1% lead in PassMark single-thread indicate balanced performance across a wide range of tasks.

The AMD Ryzen 9 8945HX is the better choice for single-threaded responsiveness and Cinebench-style rendering. The 66.1% lead in Cinebench R23 single-core is a decisive metric for users running lightly threaded applications. The 17.3% lead in Cinebench R23 multi-core makes it the better option for sustained rendering workloads. Its 13.2% advantage in data encryption is an additional niche win. The 8945HX also offers Gen 5 PCIe with 28 lanes, which is relevant for users with high-bandwidth peripherals.

Given that the average benchmark scores differ by only 2% (77,740 versus 76,212), neither processor is categorically superior. The choice hinges entirely on workload type. The AI Max+ 395 is the more versatile processor for general compute, while the 8945HX is the specialist for single-threaded and rendering tasks. The 8945HX’s unlocked multiplier is a notable feature for overclocking enthusiasts, but the AI Max+ 395’s ECC memory support and larger L1 cache are compelling for stability-critical and instruction-heavy environments. The data ultimately favors the AI Max+ 395 for most users, given its broader win count (10 versus 5) and dominance in the more common PassMark workloads.