15 specifications

AMD Ryzen 9 8945HS vs AMD Ryzen AI Max 385

On paper, the AMD Ryzen 9 8945HS boosts higher, and the AMD Ryzen AI Max 385 carries more L3 cache. Specifications describe what each chip is designed to do; how much of that either one holds under continuous load is a separate question.

11 specifications · 3 with a higher side

Full specifications

AMD Ryzen 9 8945HS

AMD · Ryzen 8040 (Hawk Point, Zen 4) · Laptop

Full specifications

AMD Ryzen AI Max 385

AMD · Ryzen AI Max (Strix Halo, Zen 5) · Laptop

Cores and clocks

Cores

Threads

Base clock

4.0 GHz

3.6 GHz

Boost clock

5.2 GHz

5.0 GHz

Cache and power

L3 cache

16 MB

32 MB

TDP

45 W

45 to 120 W

Total cache (L2 + L3)

24 MB

40 MB

Platform

Socket

FP7, FP7r2, FP8

FP11

Process

4 nm

Integrated graphics

AMD Radeon 780M

AMD Radeon 8050S Graphics

Launched

Not verified

A check marks the higher figure only on rows where higher is unambiguously better. Rows without one are not ties; they are specifications where “better” has no meaning.

Reading the table

What the difference means.

Boost clock

The Ryzen 9 8945HS boosts to 5.2 GHz against 5 GHz, 4 percent higher. Across generations it is not a guide to speed on its own, for the reason above. Boost is also a peak: it is held for seconds to minutes, on one or two cores, while the cooling and the power limit allow. What either chip settles at under a long load is lower, and it depends on the cooler and the motherboard as much as the chip.

Cache

The Ryzen AI Max 385 carries 32 MB of L3 cache against 16 MB. Cache is fast memory on the chip, and a larger one means the cores wait on main memory less often. Games, large spreadsheets and compiling respond to it; rendering and video export, which stream through data in order, respond much less.

Power and cooling

The Ryzen AI Max 385 is rated at 120 W against 45 W. The rating is the heat the cooler has to move for the chip to hold its speed, and modern chips draw well above it in short bursts. In a laptop the maker chooses the real limit inside a range, so the same chip can behave like two different processors in two machines. That spread is what a sustained test measures and a specification sheet cannot. A chip whose cooling falls short does not fail. It slows down, and it does so after the first minute, which is why short benchmarks miss it.

Platform

Laptop processors are soldered to the board, so this is a choice between machines, not between chips you can swap. What differs between two laptops with these parts is mostly the power limit and the cooling the maker gave each one.

Which to pick, on paper

A quiet or compact build: Ryzen 9 8945HS; 45 W against 120 W: less heat to move, so a smaller cooler and slower fans.

What no table says

How much of its speed a processor keeps after the first minute depends on the cooling and the power limit of the machine it is in. If you own one of these, measure it: the test is free and runs in this browser.

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Questions

Is the Ryzen 9 8945HS better than the Ryzen AI Max 385?: By need, on the specifications: a quiet or compact build: the Ryzen 9 8945HS. No specification says how much speed either one keeps under a long load; that depends on the cooling and the power limit of the machine it is in, and it is what a sustained test measures.
Do the Ryzen 9 8945HS and the Ryzen AI Max 385 use the same socket?: Laptop processors are soldered in place, so neither can be swapped for the other.
Does the Ryzen 9 8945HS or the Ryzen AI Max 385 have integrated graphics?: Both do: AMD Radeon 780M on the Ryzen 9 8945HS and AMD Radeon 8050S Graphics on the Ryzen AI Max 385.
Which runs hotter, the Ryzen 9 8945HS or the Ryzen AI Max 385?: The Ryzen AI Max 385 is rated at 120 W against 45 W, so it produces more heat under load and needs the larger cooler. How hot either one actually runs depends on the cooler and the case more than on the chip.

More comparisons

Every figure on this table is a design target. None of it is a measurement.

Nothing above describes how a processor behaves twenty minutes into a sustained workload, which is where two chips with nearly identical specifications routinely diverge. A boost clock is a ceiling the vendor permits, not a rate the chip sustains, and whether it holds depends on the cooling, the case, the power profile and the room. None of those appear on a specification sheet.

We deliberately do not reduce these figures to a single score. A composite invented from specifications would look authoritative and measure nothing, and choosing the weights would be choosing the winner.

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