AMD Ryzen 9 9955HX3D vs AMD Ryzen 7 7840HS

Updated Nov 2026 · Scored by the Let’s Compare Data Engine · How we score

For most buyers the AMD Ryzen 9 9955HX3D is the better pick — it scores 83/100 to the AMD Ryzen 7 7840HS's 45, leading on Core Specifications and Benchmark. Choose the AMD Ryzen 7 7840HS instead if integrated graphics matters most to you, where it comes out ahead.

Verdict

Our overall take, at a glance

AMD Ryzen 9 9955HX3D leads overall

AMD Ryzen 9 9955HX3D

AMD Ryzen 7 7840HS

Why it stands out

Core Specifications L1 Cache: 1,280 KB (150% more)
Core Specifications L2 Cache: 16 MB (100% more)
Core Specifications L3 Cache: 128 MB (700% more)

Winner by category for AMD Ryzen 9 9955HX3D vs AMD Ryzen 7 7840HS
Category	AMD Ryzen 9 9955HX3D	AMD Ryzen 7 7840HS	Winner
Core Specifications	64	36	AMD Ryzen 9 9955HX3D
Integrated Graphics	0	50	AMD Ryzen 7 7840HS
Benchmark	92	49	AMD Ryzen 9 9955HX3D

In-depth analysisAI

AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Nov 2026.

AMD Ryzen 9 9955HX3D

The AMD Ryzen 9 9955HX3D is a high-end flagship mobile processor designed for enthusiast gaming laptops and heavy mobile workstations. Utilizing AMD's Zen 5 architecture along with 3D V-Cache technology, it offers high clock speeds and an unlocked multiplier for user tuning. It is built for gamers and creative professionals who need desktop-grade computational performance in a portable form factor.

Best for Enthusiast high-frame-rate mobile gamingBest for Heavy multi-threaded mobile productivity like 3D rendering and video compilation

Pros

Incorporates 3D V-Cache technology to significantly enhance frame rates in cache-sensitive games
Unlocked multiplier on the HX platform permits performance tuning and overclocking
Based on the Zen 5 architecture for high instruction-per-clock efficiency

Cons

High power draw and thermal demands require thick, heavy laptop cooling designs
Requires a high-end discrete GPU to avoid bottlenecks in graphically intensive workloads

AMD Ryzen 7 7840HS

AMD Ryzen processors are x86-64 microprocessors based on the Zen microarchitecture. The mobile category includes various series and generations, such as the 2000, 3000, 4000, 5000, 6000, 7000, and 8000 series. The general Ryzen process line features chips like the Ryzen 3, Ryzen 5, Ryzen 7, Ryzen 9, and Ryzen Threadripper.

Pros

N/A - No direct information on the AMD Ryzen 7 7840HS is available in the provided sources.

Cons

N/A - No direct information on the AMD Ryzen 7 7840HS is available in the provided sources.

Value for Money

Which is the better deal for the price

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AMD Ryzen 9 9955HX3D

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AMD Ryzen 7 7840HS

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Performance

Higher benchmark score = faster

AMD Ryzen 9 9955HX3D62,152

AMD Ryzen 7 7840HS28,203

See the raw benchmark values →

Benchmark score — a measured indicator of raw performance, not a guarantee of real-world speed.

Review Videos

Hand-picked expert reviews for each product

Detailed Specifications

The full spec sheet, side by side

Core Specifications

Feature	AMD Ryzen 9 9955HX3D	AMD Ryzen 7 7840HS
Cores	16	8
Threads	32	16
Base Frequency	2.5 GHz	3.8 GHz52% more
Base Power Consumption	55 W57% more	35 W
Maximum Frequency	5.4 GHz6% more	5.1 GHz
Maximum Power Consumption	75 W39% more	54 W
L1 Cache	1,280 KB150% more	512 KB
L2 Cache	16 MB100% more	8 MB
L3 Cache	128 MB700% more	16 MB
Lithography Process	4 nm	4 nm
Is unlocked	Yes	No

Integrated Graphics

Feature	AMD Ryzen 9 9955HX3D	AMD Ryzen 7 7840HS
Model	N/A

Benchmark

Feature	AMD Ryzen 9 9955HX3D	AMD Ryzen 7 7840HS
PassMark CPU Mark	62,152120% more	28,203

Specification Note

Specifications are compiled from official manufacturer data and other reliable internet sources. Some features may vary by region or model configuration.

Frequently Asked Questions

Common questions about AMD Ryzen 9 9955HX3D vs AMD Ryzen 7 7840HS comparison

Based on our overall comparison score, AMD Ryzen 9 9955HX3D rates higher at 91/100 versus 59/100 for AMD Ryzen 7 7840HS — a 32-point lead. AMD Ryzen 9 9955HX3D is the stronger overall pick, though the right choice still depends on which specs matter most to you; the full spec table above breaks down every difference.

AMD Ryzen 9 9955HX3D and AMD Ryzen 7 7840HS are compared side by side above across every spec in the cpus category — including performance, features and design — each scored 0–100 so you can see exactly where one leads the other. Our overall scores are 91/100 for AMD Ryzen 9 9955HX3D and 59/100 for AMD Ryzen 7 7840HS.

If you want the higher-rated cpus option overall, AMD Ryzen 9 9955HX3D (91/100) edges out AMD Ryzen 7 7840HS (59/100). But if AMD Ryzen 7 7840HS is cheaper or stronger on the specific specs you care about, it can still be the better buy — use the spec table and strengths profile above to decide.