AMD Ryzen AI Max+ 395 vs Intel Core Ultra 9 285HX Comparison

The AMD Ryzen AI Max+ 395 and Intel Core Ultra 9 285HX are two flagship mobile processors that define the high-end laptop landscape in 2025. Both are active, 55-watt parts aimed at different philosophies of computing, and benchmark results show a clear split between workloads that favor massive memory bandwidth and those that favor raw single-thread speed. The data reveals that Intel wins the majority of direct comparisons, taking 11 out of 15 head-to-head tests, yet AMD secures decisive victories in specific computational areas that suggest a distinct use-case advantage.

FAQ

Q: Which processor has a higher average benchmark score?

A: The AMD Ryzen AI Max+ 395 has a higher average benchmark score of 77,740, compared to the Intel Core Ultra 9 285HX’s 76,155. This places both chips in the 95th percentile of all CPUs, indicating they are elite performers.

Q: How does the Intel Core Ultra 9 285HX compare to the AMD Ryzen 9 8945HX?

A: The Intel Core Ultra 9 285HX is essentially tied with the AMD Ryzen 9 8945HX, showing a delta of -0.1% in average score. This means the 285HX performs within a fraction of a percent of the 8945HX in aggregate benchmarks.

Q: What is the most significant single benchmark margin between the two?

A: The largest margin is in the PassMark integer math test, where the AMD Ryzen AI Max+ 395 scores 200,665, which is 29.4% higher than the Intel’s 155,076. Conversely, Intel holds a 34% lead in floating-point math.

Q: Which chip has a larger L3 cache?

A: The AMD Ryzen AI Max+ 395 features a shared 64 MB L3 cache, while the Intel Core Ultra 9 285HX has a shared 36 MB L3 cache. This gives AMD a substantial 28 MB advantage in last-level cache.

Q: Is the Intel Core Ultra 9 285HX’s single-thread performance significantly better?

A: Yes, benchmark results indicate a clear lead for Intel. In Cinebench R23 single-core, the 285HX scores 2187.5 versus AMD’s 2044, a 6.6% advantage, and in PassMark single-thread it leads by 10.2% with a score of 4618 versus 4147.

Q: Which processor supports more PCIe lanes?

A: The Intel Core Ultra 9 285HX supports Gen 5 with 20 lanes (CPU only), whereas the AMD Ryzen AI Max+ 395 supports Gen 4 with 16 lanes (CPU only). This indicates Intel has a newer and wider PCIe interface.

Architecture Differences

The two processors represent fundamentally different design strategies from AMD and Intel. The AMD Ryzen AI Max+ 395 is built on the Zen 5 architecture, codenamed “Strix Halo,” and fabricated on a 4nm process at TSMC. Its die is composed of two chiplets, each measuring 70.6 mm², totaling a combined die size that is not listed in the data. In contrast, the Intel Core Ultra 9 285HX uses the Arrow Lake architecture, codenamed “Arrow Lake-HX,” on a more advanced 3nm process, also from TSMC, with a single 243 mm² die containing 17,800 million transistors.

Core configurations diverge sharply. AMD packs 16 cores and 32 threads, relying on simultaneous multithreading to double its thread count. Intel, however, uses 24 cores but only 24 threads, indicating it does not employ hyper-threading on this part. This means Intel relies on physical core count for multi-threaded work, while AMD leverages its thread-doubling technology. The cache hierarchy also differs: AMD provides 80 KB of L1 and 1 MB of L2 per core, with a massive 64 MB of shared L3. Intel offers larger per-core caches—192 KB of L1 and 3 MB of L2—but a smaller 36 MB of shared L3.

Memory architecture is another major differentiator. AMD supports LPDDR5X across a quad-channel bus, delivering 256.0 GB/s of bandwidth. Intel supports DDR5 over a dual-channel bus, offering only 102.4 GB/s. This 2.5x bandwidth advantage for AMD is a defining architectural trait. Both chips support ECC memory and have integrated graphics, with AMD featuring the Radeon 8060S and Intel the Arc Xe-LPG Graphics 64EU. Process nodes and foundries are identical (TSMC), but the node size differs (4nm vs 3nm), and Intel’s die is significantly larger.

Head-to-Head Benchmarks

The benchmark suite paints a picture of Intel dominating single-thread and floating-point workloads, while AMD excels in integer and data-heavy tasks. Starting with Cinebench, Intel wins all four tests. In Cinebench R15 multi-core, Intel scores 5656.5 versus AMD’s 5463, a 3.4% lead. The single-core R15 test shows Intel at 323.5 against 316, a 2.3% edge. Moving to R23, Intel’s multi-core score of 36429.5 beats AMD’s 35314 by 3.1%, and the single-core gap widens to 6.6% (2187.5 vs 2044). This pattern suggests Intel’s higher boost clock of 5.50 GHz, versus AMD’s 5.10 GHz, provides a meaningful advantage in lightly-threaded applications.

In specialized PassMark tests, AMD counters with significant wins. The most dramatic is integer math, where AMD’s 200,665 score crushes Intel’s 155,076, a 29.4% advantage. AMD also leads in data compression (690,650 vs 631,885, up 9.3%) and extended instructions (56,346 vs 49,148, up 14.6%). However, Intel retaliates in floating-point math, scoring 194,998 versus AMD’s 128,682, a 34% margin that mirrors AMD’s integer lead. Intel also dominates in data encryption (48,567 vs 35,455, up 27%) and find prime numbers (460 vs 303, up 34.1%).

The aggregate PassMark multithread test favors Intel slightly, with a score of 56,902 versus 54,934, a 3.5% difference. Single-thread scores show Intel ahead by 10.2% (4,618 vs 4,147). Notably, AMD wins the physics test by a razor-thin margin of 0.1% (3,481 vs 3,476), while Intel wins random string sorting by 1.3% (77,196 vs 76,177). These results indicate a balanced rivalry: Intel wins 11 tests with an average margin of roughly 13% across its victories, while AMD wins 4 tests with an average margin of 13.4% across its wins.

Specification Differences

The specification sheets reveal several key differences beyond raw performance. The core and thread counts differ, with AMD offering 16 cores/32 threads and Intel 24 cores/24 threads. Base clocks are similar (3.00 GHz vs 2.80 GHz), but Intel’s boost clock is higher (5.50 GHz vs 5.10 GHz). Both have a TDP of 55 watts, but their sockets are incompatible: AMD uses Socket FP11, while Intel uses BGA 2114.

Memory support distinguishes them: AMD uses LPDDR5X with a quad-channel bus and 256.0 GB/s bandwidth, whereas Intel uses DDR5 with a dual-channel bus and 102.4 GB/s. Both support ECC. PCIe capabilities differ, with Intel offering Gen 5 and 20 lanes versus AMD’s Gen 4 and 16 lanes. The integrated graphics differ (Radeon 8060S vs Arc Xe-LPG Graphics 64EU). Intel has a larger die (243 mm² vs 2x 70.6 mm²) and lists its transistor count at 17,800 million, while AMD does not provide one. Intel’s multiplier is unlocked, whereas AMD’s is locked. Release dates are close, with AMD launching on January 5, 2025, and Intel a week later on January 12, 2025.

The Verdict

The data indicates that the Intel Core Ultra 9 285HX is the better choice for users prioritizing single-thread performance and floating-point math. Its 6.6% lead in Cinebench R23 single-core and 34% advantage in floating-point operations make it ideal for applications like scientific simulations, financial modeling, and legacy software that relies on high clock speeds. Intel also wins the overall multithread test by 3.5%, suggesting it handles general productivity workloads slightly better.

However, the AMD Ryzen AI Max+ 395 is the superior option for integer-heavy tasks and data manipulation. Its 29.4% lead in integer math and 9.3% advantage in data compression point to strengths in database, encryption (where it loses), and compression workloads. The massive 256.0 GB/s memory bandwidth, combined with 64 MB of L3 cache, makes it a data powerhouse despite losing the aggregate multithread test. For users who care about raw compute throughput in specific integer workloads, AMD is the clear winner.

The Verdict hinges on workload: pick Intel for general performance, single-thread speed, and floating-point tasks; pick AMD for memory-bandwidth-intensive and integer-heavy applications. Neither chip is universally dominant, but Intel’s 11-4 win count in head-to-heads suggests it is the more versatile processor for typical users.

Where Each One Wins

The Intel Core Ultra 9 285HX wins in scenarios that demand high clock speeds and strong floating-point capability. This includes 3D rendering (Cinebench R15 and R23 multi-core wins), single-threaded productivity apps, and scientific computing where floating-point math is prevalent. Its 34% lead in floating-point math and 27% lead in data encryption make it suitable for cryptography and engineering simulations. The unlocked multiplier also offers overclocking potential for enthusiasts, a feature AMD lacks.

The AMD Ryzen AI Max+ 395 wins in data-centric and integer-heavy workloads. Its 29.4% advantage in integer math makes it excellent for financial analysis, database operations, and integer-based algorithms. The 9.3% lead in data compression benefits archival and file-handling tasks. The quad-channel LPDDR5X memory and 256.0 GB/s bandwidth, coupled with 64 MB of L3 cache, provide a significant edge in multi-threaded data streaming and large dataset processing. Its 14.6% lead in extended instructions suggests strength in media encoding and cryptographic hashing (despite losing encryption). For users running virtual machines or handling massive datasets in memory, AMD’s bandwidth advantage is transformative.