AMD Ryzen 7 7840H vs Intel Core i7 1255U

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We compared two laptop CPUs: AMD Ryzen 7 7840H with 8 cores 3.8GHz and Intel Core i7 1255U with 10 cores 1.7GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD Ryzen 7 7840H 's Advantages

Released 11 months late

Better graphics card performance

Larger memory bandwidth (89.6GB/s vs 76.8GB/s)

Higher base frequency (3.8GHz vs 1.7GHz)

Larger L3 cache size (16MB vs 12MB)

Intel Core i7 1255U 's Advantages

Higher specification of memory (LPDDR5-5200 vs DDR5-5600)

Newer PCIe version (4.0 vs 4)

Lower TDP (12W vs 35W)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 7 7840H +7%

1800

Intel Core i7 1255U

1669

Cinebench R23 Multi Core

AMD Ryzen 7 7840H +114%

17887

Intel Core i7 1255U

8335

Geekbench 6 Single Core

AMD Ryzen 7 7840H +16%

2625

Intel Core i7 1255U

2248

Geekbench 6 Multi Core

AMD Ryzen 7 7840H +64%

11813

Intel Core i7 1255U

7162

Blender

AMD Ryzen 7 7840H +155%

197

Intel Core i7 1255U

77

Geekbench 5 Single Core

AMD Ryzen 7 7840H +17%

1909

Intel Core i7 1255U

1628

Geekbench 5 Multi Core

AMD Ryzen 7 7840H +55%

11494

Intel Core i7 1255U

7372

Passmark CPU Single Core

AMD Ryzen 7 7840H +19%

3947

Intel Core i7 1255U

3308

Passmark CPU Multi Core

AMD Ryzen 7 7840H +104%

28248

Intel Core i7 1255U

13792

AMD Ryzen 7 7840H

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Intel Core i7 1255U

General Parameters

Jan 2023

Release Date

Feb 2022

AMD

Manufacturer

Intel

Laptop

Type

Laptop

-

Instruction Set

x86-64

Phoenix

Core Architecture

Alder Lake

-

Processor Number

i7-1255U

AMD Socket FP8

Socket

BGA-1744

Radeon 780M

Integrated Graphics

Iris Xe Graphics (96EU)

Ryzen 7 (Zen 4 (Phoenix))

Generation

-

Package

25 billions

Transistor Count

-

4 nm

Manufacturing Process

10 nm

AMD Socket FP8

Socket

BGA-1744

35 W

Power Consumption

12-15 W

-

Max Turbo Power Consumption

55 W

100 °C

Peak Operating Temperature

100°C

TSMC

Foundry

-

178 mm²

Die Size

-

FP8, FP7, FP7r2

Package

-

CPU Performance

-

Performance Cores

2

-

Performance Core Threads

4

3.8 GHz

Performance Core Base Frequency

1.7 GHz

5.1 GHz

Performance Core Turbo Frequency

4.7 GHz

-

Efficiency Cores

8

-

Efficiency Core Threads

8

-

Efficiency Core Base Frequency

1.2 GHz

-

Efficiency Core Turbo Frequency

3.5 GHz

8

Total Core Count

10

16

Total Thread Count

12

100 MHz

Bus Frequency

100 MHz

38.0

Multiplier

17x

64 K per core

L1 Cache

80 K per core

1 MB per core

L2 Cache

1280 K per core

16 MB shared

L3 Cache

12 MB shared

No

Unlocked Multiplier

No

1

SMP

-

Memory Parameters

DDR5-5600

Memory Types

DDR5-4800, DDR4-3200, LPDDR5-5200, LPDDR4x-4267

256 GB

Max Memory Size

64 GB

2

Max Memory Channels

2

89.6 GB/s

Max Memory Bandwidth

76.8 GB/s

Yes

ECC Memory Support

No

Graphics Card Parameters

true

Integrated Graphics

true

-

GPU Base Frequency

300 MHz

2700 MHz

GPU Max Dynamic Frequency

1250 MHz

-

Shader Units

768

-

Texture Units

48

-

Raster Operation Units

24

12

Execution Units

96

-

Power Consumption

15 W

10 TFLOPS

Graphics Performance

1.69 TFLOPS

Miscellaneous

AMD Ryzen 7 7840H

Official Website

Intel Core i7 1255U

4

PCIe Version

4.0

20

PCIe Lanes

20

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