15 specifications

AMD Ryzen 9 7940HS vs AMD Ryzen AI 7 450

On paper, the AMD Ryzen 9 7940HS boosts higher. 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 · 2 with a higher side

Full specifications

AMD Ryzen 9 7940HS

AMD · Ryzen 7040 (Phoenix, Zen 4) · Laptop

Full specifications

AMD Ryzen AI 7 450

AMD · Ryzen AI 400 (Zen 5) · Laptop

Cores and clocks

Cores

Threads

Base clock

4.0 GHz

2.0 GHz

Boost clock

5.2 GHz

5.1 GHz

Cache and power

L3 cache

16 MB

TDP

35 to 54 W

15 to 54 W

Total cache (L2 + L3)

Not verified

24 MB

Platform

Socket

FP7, FP7r2, FP8

FP8

Process

4 nm

Integrated graphics

AMD Radeon 780M (12 CU)

AMD Radeon 860M Graphics

Launched

2023-04-30

2026-01-05

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.

3 years apart

The Ryzen AI 7 450 (Ryzen AI 400 (Zen 5), 2026) is 3 years newer than the Ryzen 9 7940HS (Ryzen 7040 (Phoenix, Zen 4), 2023). That matters more than any single row in the table, because a newer design usually does more work in each clock cycle. Clock speeds are only a fair comparison between chips of the same generation; across a gap this wide, a lower number on the newer chip can still be the faster core.

Boost clock

The Ryzen 9 7940HS boosts to 5.2 GHz against 5.1 GHz, 2 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.

Power and cooling

Both are rated at 54 W, so they ask the same of a cooler and a power supply. The rating is the heat to be moved for the chip to hold its speed; both draw above it in short bursts, and either one slows down rather than fails when the cooling falls short.

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.

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.

Free CPU stress test

Questions

Is the Ryzen 9 7940HS better than the Ryzen AI 7 450?: The Ryzen AI 7 450 is the newer design by 3 years, which usually means faster cores. On the specifications they are closely matched. 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 7940HS and the Ryzen AI 7 450 use the same socket?: Laptop processors are soldered in place, so neither can be swapped for the other.
Does the Ryzen 9 7940HS or the Ryzen AI 7 450 have integrated graphics?: Both do: AMD Radeon 780M (12 CU) on the Ryzen 9 7940HS and AMD Radeon 860M Graphics on the Ryzen AI 7 450.

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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