AMD

AMD Ryzen 7 7840U

Brand:: AMD
Form Factor:: Desktop
CPU Socket:: FP7, FP7r2, FP8
Core/Thread Count:: 8C/16T
TDP:: 28W
iGPU:: AMD Radeon 780M
CPU Series:: Ryzen 7000 Series

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Manufacturer: AMD Last updated: 2026-10-10

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AMD Ryzen 7 7840U Review

AMD Ryzen 7 7840U desktop processor, 8C/16T 3.3 GHz base clock boosting up to 5.1 ghz, 28W TDP, FP7, FP7r2, FP8 socket.

The AMD Ryzen 7 7840U is part of AMD's Ryzen 7000 Series lineup (Phoenix), built for desktop systems. It offers 8C/16T with a 3.3 GHz base clock boosting up to 5.1 ghz, backed by 16 MB of L3 cache, within a 28W TDP on the FP7, FP7r2, FP8 platform, with AMD Radeon 780M integrated graphics.

Performance and Architecture

With 8C/16T, the AMD Ryzen 7 7840U runs at 3.3 GHz base clock boosting up to 5.1 ghz. Cache totals 8 MB L2 and 16 MB L3. Its AMD Radeon 780M integrated graphics (12 cores) handle display output and light graphics work without a discrete GPU.

Platform and Compatibility

The AMD Ryzen 7 7840U uses the FP7, FP7r2, FP8 platform in a 28W envelope. It supports DDR5 (FP7r2) , LPDDR5X (FP7-FP8) memory across 2 channels.

Comparison to Alternatives

Within the Ryzen 7000 Series lineup in this catalog, the AMD Ryzen 7 7840U is positioned by its core/thread count and TDP relative to other Ryzen parts. Buyers comparing options in this class should weigh core count and clock speed against platform cost and intended workload.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

Mainstream desktop builds
Everyday productivity
Value-focused upgrades

Not for

Extreme overclocking (unless K/X-series)
Workstation-class multi-threaded workloads
SFF builds without adequate cooling

Specifications

What these specs mean

Identity

Product Line	Ryzen 7
Model Number	7840U
Codename	Phoenix
Release Year	2023

Segment and platform

Market Segment	Laptop
Microarchitecture	Zen 4
Socket	FP7, FP7r2, FP8
Process Node	TSMC 4nm FinFET

Core configuration

Total Cores	8
Performance Cores	8
Efficiency Cores	0
Total Threads	16
SMT Enabled	Yes

Clock speeds

P-Core Base Clock	3.3 GHz
P-Core Boost Clock	5.1 GHz
Unlocked Multiplier	No

Cache

L2 Cache	8 MB
L3 Cache	16 MB

Power and thermal

Base Power	28 W
Max Turbo Power	30 W
Configurable TDP Floor	15 W

Memory

Memory Type	DDR5, LPDDR5X
Max Memory Speed	7500 MT/s
Memory Channels	2

Graphics and AI

Integrated Graphics	Yes
iGPU Model	AMD Radeon 780M
iGPU Compute Units	12
Copilot Plus Certified	No

Expansion

PCIe Generation	PCIe 4.0

Form Factor	Laptop
TDP	28 W
iGPU	AMD Radeon 780M

FAQs

What are the key specifications of the AMD Ryzen 7 7840U?

The AMD Ryzen 7 7840U has 8 cores and 16 threads, a 3.3 GHz base and 5.1 GHz boost clock, 16 MB of L3 cache and a 28 W TDP. Integrated graphics: AMD Radeon 780M. Socket: FP7, FP7r2, FP8.

Will the AMD Ryzen 7 7840U work with my current setup?

The AMD Ryzen 7 7840U lists Socket is FP7, FP7r2, FP8. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the AMD Ryzen 7 7840U best suited to?

Best suited to: Mainstream desktop builds; Everyday productivity; Value-focused upgrades.

What are the drawbacks of the AMD Ryzen 7 7840U?

Not the best fit for: Extreme overclocking (unless K/X-series); Workstation-class multi-threaded workloads; SFF builds without adequate cooling.