AMD Ryzen 9 7900X vs AMD Ryzen AI Max 390 Comparison

Where Each One Wins

The recorded data splits these two 12-core, 24-thread processors into clearly different roles. The AMD Ryzen AI Max 390 wins 3 of the 15 head-to-head comparisons, while the AMD Ryzen 9 7900X takes 12. The decisive factor is workload type. The Ryzen AI Max 390 dominates in Cinebench rendering, particularly single-core and multi-core threaded workloads that scale with the newer Zen 5 architecture. Its Cinebench R23 multi-core score of 36064 beats the 7900X's 29300 by 23.1%, and its single-core score of 5091 is 152.5% higher than the 7900X's 2016.5. The Ryzen 9 7900X, however, leads across the entire PassMark suite, including integer math, floating point math, encryption, compression, and physics simulations, with deltas ranging from 5% to 32.6%.

Use-case interpretation follows from those results. For content creation, 3D rendering, and any application built around Cinebench-style ray tracing workloads, the Ryzen AI Max 390 is the stronger part. Its Cinebench R15 single-core score of 513 versus 323, a 58.8% advantage, also signals better responsiveness in lightly threaded tasks. The Ryzen 9 7900X is the better choice for general productivity, data processing, scientific computing, and security workloads, where its PassMark leads in encryption (37263 vs 25097, 32.6% ahead) and data compression (632505 vs 487145, 23% ahead) matter more. The 7900X also holds a 5% edge in PassMark single-thread performance (4238 vs 4028), which is a tighter margin than the Cinebench gap, suggesting the two architectures trade blows depending on the instruction mix.

Architecture Differences

The two processors come from different generations and manufacturing processes. The Ryzen AI Max 390 is built on Zen 5 architecture using the Strix Halo codename, fabricated on a 4 nm TSMC process. The Ryzen 9 7900X belongs to the Zen 4 family, codename Raphael, on a 5 nm TSMC node. Both have 12 cores and 24 threads, but the cache layouts differ. The AI Max 390 provides 80 KB of L1 per core and 1 MB of L2 per core, with 64 MB of shared L3. The 7900X has 64 KB of L1 per core, 1 MB of L2 per core, and the same 64 MB of shared L3. The AI Max 390's larger L1 per core likely contributes to its Cinebench single-core advantage. The 7900X has 13,140 million transistors across two 71 mm² dies, while the AI Max 390 uses two 70.6 mm² dies with no transistor count listed.

Memory architecture is a major divergence. The AI Max 390 supports LPDDR5X with a quad-channel bus and 256.0 GB/s of bandwidth. The 7900X uses DDR5 with a dual-channel bus and 83.2 GB/s of bandwidth. The AI Max 390's memory bandwidth is roughly three times higher, which benefits multi-threaded rendering that streams large datasets. The 7900X compensates with PCIe Gen 5 support and 24 lanes, whereas the AI Max 390 offers PCIe Gen 4 with only 16 lanes. Both support ECC memory. The AI Max 390 integrates a Radeon 8050S GPU, while the 7900X has a basic Radeon Graphics solution. The 7900X has an unlocked multiplier for overclocking; the AI Max 390 does not. The 7900X is a desktop part for Socket AM5, while the AI Max 390 is a mobile part for Socket FP11. The 7900X has a 170 W TDP, the AI Max 390 a 55 W TDP. The 7900X launched on 2022-09-26 with a launch MSRP of $549; the AI Max 390 released on 2025-01-05.

Head-to-Head Benchmarks

The Cinebench results show the AI Max 390's strongest territory. In Cinebench R23 multi-core, it scores 36064 against 29300, a 23.1% lead. The single-core R23 result is even more lopsided: 5091 vs 2016.5, a 152.5% advantage. In Cinebench R15, the AI Max 390 wins single-core with 513 vs 323, a 58.8% gap, but loses multi-core with 3635 vs 4820.5, a 24.6% deficit. This split between R15 multi-core and R23 multi-core is notable: the AI Max 390's R23 result is far stronger relative to the 7900X than its R15 result, which may reflect different workload scaling or memory bandwidth sensitivity. The 7900X's R15 multi-core win suggests that older rendering benchmarks do not fully utilize the AI Max 390's architectural strengths.

The PassMark suite tells the opposite story. The 7900X wins all 12 PassMark tests in the head-to-head data. The largest margins are in data encryption (37263 vs 25097, 32.6% ahead), random string sorting (74658 vs 53113, 28.9% ahead), and data compression (632505 vs 487145, 23% ahead). Integer math (169273 vs 146519) and floating point math (103952 vs 90594) show 13.4% and 12.9% leads respectively. The 7900X also wins PassMark multi-thread (51406 vs 41737, 18.8% ahead) and PassMark physics (3060 vs 2761, 9.8% ahead). The smallest gap is in PassMark single-thread (4238 vs 4028, 5% ahead), which aligns with the AI Max 390's competitive Cinebench single-core showing. Extended instructions (47619 vs 38716) and find prime numbers (388 vs 316) complete the 7900X sweep, with margins of 18.7% and 18.6% respectively.

The average benchmark scores reflect a mixed picture. The AI Max 390 has a higher average benchmark score of 56273 across all its recorded tests, placing it in the 91st percentile of all CPUs. The 7900X has an average of 53288, also in the 91st percentile. The AI Max 390's nearest rivals include the AMD Ryzen AI 9 HX PRO 470 (0.1% lower), Intel Core i9-14900HX (0.5% lower), AMD Ryzen Threadripper PRO 3955WX (0.5% higher), and Intel Core 7 253PQE (0.6% lower). The 7900X's nearest rivals are the AMD EPYC 7313P (0.2% lower), Intel Xeon Phi 7290 (0.3% higher), Intel Xeon 634 (0.6% lower), and Intel Core i7-14700F (0.6% higher). Both sit within a tight band of comparable processors.

The Verdict

The data supports a clear division of labor. The Ryzen AI Max 390 is the rendering-focused processor. Its Cinebench R23 multi-core score is 23.1% higher than the 7900X, and its single-core R23 result is 152.5% higher. For users running modern ray-tracing renders, video encoding, or any workload that resembles Cinebench's mixed integer and floating point stress, the AI Max 390 delivers substantially more throughput. Its lower 55 W TDP and mobile socket also make it suitable for compact systems, though the database does not list performance-per-watt measurements.

The Ryzen 9 7900X is the all-round productivity and data processing chip. It wins 12 of 15 head-to-head tests, including every PassMark category. Its encryption, compression, and random string sorting leads are particularly large, making it the stronger choice for database operations, file archiving, cryptographic tasks, and scientific simulations. The 7900X's 170 W TDP and desktop platform provide sustained performance for long-running compute jobs, and its unlocked multiplier allows user tuning. Its 5% PassMark single-thread edge is modest, so the 7900X does not completely dominate in lightly threaded scenarios, but the AI Max 390's single-thread win in Cinebench R23 is an outlier that does not repeat in PassMark.

Pick the Ryzen AI Max 390 if your priority is Cinebench-style rendering or if you need the higher memory bandwidth of LPDDR5X at 256.0 GB/s. Pick the Ryzen 9 7900X if your workloads span encryption, compression, physics, or general integer and floating point math, where its PassMark leads are consistent and often large. The 7900X also offers PCIe Gen 5 connectivity, which the AI Max 390 lacks. Both CPUs sit at the 91st percentile, so neither is a weak performer; the choice depends entirely on the application mix.

FAQ

Q: Which CPU has the higher multi-core Cinebench R23 score?

A: The AMD Ryzen AI Max 390 scores 36064, which is 23.1% higher than the Ryzen 9 7900X's 29300.

Q: How large is the single-core Cinebench R23 gap?

A: The AI Max 390 scores 5091 versus the 7900X's 2016.5, a 152.5% advantage for the AI Max 390.

Q: Which processor is better for data encryption?

A: The Ryzen 9 7900X leads with a PassMark data encryption score of 37263, which is 32.6% higher than the AI Max 390's 25097.

Q: Do both processors have the same number of cores and threads?

A: Yes, both have 12 cores and 24 threads, but the AI Max 390 uses Zen 5 on 4 nm, while the 7900X uses Zen 4 on 5 nm.

Q: What is the memory bandwidth difference?

A: The AI Max 390 has quad-channel LPDDR5X with 256.0 GB/s bandwidth, while the 7900X has dual-channel DDR5 with 83.2 GB/s bandwidth.

Q: Which CPU has more PCIe lanes and what generation?

A: The Ryzen 9 7900X has 24 PCIe Gen 5 lanes, while the Ryzen AI Max 390 has 16 PCIe Gen 4 lanes.

Specification Differences

| Specification | AMD Ryzen AI Max 390 | AMD Ryzen 9 7900X |

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

| Architecture | Zen 5 | Zen 4 |

| Codename | Strix Halo | Raphael |

| Process Node | 4 nm | 5 nm |

| Base Clock | 3.20 GHz | 4.70 GHz |

| Boost Clock | 5.00 GHz | 5.60 GHz |

| TDP | 55 W | 170 W |

| Socket | AMD Socket FP11 | AMD Socket AM5 |

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

| L3 Cache | 64 MB (shared) | 64 MB (shared) |

| Memory Support | LPDDR5X | DDR5 |

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

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

| PCIe | Gen 4, 16 Lanes | Gen 5, 24 Lanes |

| Integrated Graphics | Radeon 8050S | Radeon Graphics |

| Market Segment | Mobile | Desktop |

| Transistors | Not listed | 13,140 million |

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

| Multiplier Unlocked | No | Yes |

| Release Date | 2025-01-05 | 2022-09-26 |

| Launch MSRP | Not listed | $549 |