AMD Ryzen 5 8640HS vs Intel Core Ultra 7 155U

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CPU comparison with benchmarks


AMD Ryzen 5 8640HS CPU1 vs CPU2 Intel Core Ultra 7 155U
AMD Ryzen 5 8640HS Intel Core Ultra 7 155U

CPU comparison

In this CPU comparison, we compare the AMD Ryzen 5 8640HS and the Intel Core Ultra 7 155U and use benchmarks to check which processor is faster.

We compare the AMD Ryzen 5 8640HS 6 core processor released in Q1/2024 with the Intel Core Ultra 7 155U which has 12 CPU cores and was introduced in Q4/2023.
AMD Ryzen 5 (84) Family Intel Core Ultra 7 (9)
AMD Ryzen 8040 (20) CPU group Intel Core Ultra 100U (7)
7 Generation 1
Hawk Point (Zen 4) Architecture Meteor Lake U
Mobile Segment Mobile
AMD Ryzen 5 7640HS Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD Ryzen 5 8640HS is a 6 core processor with a clock frequency of 3.80 GHz (5.00 GHz). The processor can compute 12 threads at the same time. The Intel Core Ultra 7 155U clocks with 1.70 GHz (4.80 GHz), has 12 CPU cores and can calculate 14 threads in parallel.

AMD Ryzen 5 8640HS Characteristic Intel Core Ultra 7 155U
6 Cores 12
12 Threads 14
normal Core architecture hybrid (big.LITTLE)
Yes Hyperthreading Yes
No Overclocking ? No
3.80 GHz (5.00 GHz)
6x Zen 4
A-Core 1.70 GHz (4.80 GHz)
2x Redwood Cove
-- B-Core 1.20 GHz (3.80 GHz)
8x Crestmont
-- C-Core 0.70 GHz (2.10 GHz)
2x Crestmont

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

AMD Ryzen 5 8640HS Characteristic Intel Core Ultra 7 155U
AMD Ryzen AI AI hardware Intel AI engine
AMD Ryzen™ AI AI specifications Intel AI Boost @ 1.4 GHz (OpenVINO, WindowsML, DirectML, ONNX RT)

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

AMD Radeon 760M GPU Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake)
0.80 GHz GPU frequency 0.60 GHz
2.60 GHz GPU (Turbo) 1.95 GHz
10 GPU Generation --
4 nm Technology 5 nm
4 Max. displays 4
8 Compute units 64
512 Shader 512
Yes Hardware Raytracing Yes
AMD FSR Frame Generation No
32 GB Max. GPU Memory 32 GB
12 DirectX Version 12.2

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.

AMD Radeon 760M GPU Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake)
Decode / Encode Codec h265 / HEVC (8 bit) Decode / Encode
Decode / Encode Codec h265 / HEVC (10 bit) Decode / Encode
Decode / Encode Codec h264 Decode / Encode
Decode Codec VP9 Decode
Decode Codec VP8 Decode
Decode / Encode Codec AV1 Decode / Encode
Decode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode / Encode

Memory & PCIe

Up to 256 GB of memory in a maximum of 2 memory channels is supported by the AMD Ryzen 5 8640HS, while the Intel Core Ultra 7 155U supports a maximum of 96 GB of memory with a maximum memory bandwidth of 120.0 GB/s enabled.

AMD Ryzen 5 8640HS Characteristic Intel Core Ultra 7 155U
DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500 Memory LPDDR5X-7500, DDR5-5600
256 GB Max. Memory 96 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
120.0 GB/s Max. Bandwidth 120.0 GB/s
Yes ECC No
6.00 MB L2 Cache 12.00 MB
16.00 MB L3 Cache --
4.0 PCIe version 4.0
20 PCIe lanes 20
39.4 GB/s PCIe Bandwidth 39.4 GB/s

Thermal Management

The AMD Ryzen 5 8640HS has a TDP of 28 W. The TDP of the Intel Core Ultra 7 155U is 15 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD Ryzen 5 8640HS Characteristic Intel Core Ultra 7 155U
28 W TDP (PL1 / PBP) 15 W
-- TDP (PL2) 57 W
54 W TDP up 28 W
35 W TDP down 12 W
100 °C Tjunction max. 110 °C

Technical details

The AMD Ryzen 5 8640HS has 22.00 MB cache and is manufactured in 4 nm. The cache of Intel Core Ultra 7 155U is at 12.00 MB. The processor is manufactured in 7 nm.

AMD Ryzen 5 8640HS Characteristic Intel Core Ultra 7 155U
4 nm Technology 7 nm
Monolithic Chip design Chiplet
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 ISA extensions SSE4.1, SSE4.2, AVX2
FP8 Socket BGA 2049
AMD-V, SVM Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems Windows 11, Linux
Q1/2024 Release date Q4/2023
-- Release price --
show more data show more data


Rate these processors

Here you can rate the AMD Ryzen 5 8640HS to help other visitors make their purchasing decisions. The average rating is 5.0 stars (3 ratings). Rate now:
Here you can rate the Intel Core Ultra 7 155U to help other visitors make their purchasing decisions. The average rating is 4.0 stars (7 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
AMD Ryzen 5 8640HS (100%)
Intel Core Ultra 7 155U (95%)
⌀ Multi core performance in 0 CPU benchmarks
AMD Ryzen 5 8640HS (0%)
Intel Core Ultra 7 155U (0%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
AMD Ryzen 5 8640HS AMD Ryzen 5 8640HS
6C 12T @ 5.00 GHz
2478 (100%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
2354 (95%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
AMD Ryzen 5 8640HS AMD Ryzen 5 8640HS
AMD Radeon 760M @ 2.60 GHz
2663 (100%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake) @ 1.95 GHz
1935 (73%)

Cinebench 2024 (Single-Core)

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
AMD Ryzen 5 8640HS AMD Ryzen 5 8640HS
6C 12T @ 5.00 GHz
99 (100%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
0 (0%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
AMD Ryzen 5 8640HS AMD Ryzen 5 8640HS
6C 12T @ 5.00 GHz
1802 (100%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
0 (0%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
AMD Ryzen 5 8640HS AMD Ryzen 5 8640HS
6C 12T @ 3.80 GHz
0 (0%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
9716 (100%)

Performance for Artificial Intelligence (AI) and Machine Learning (ML)

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. The performance is given in the number (trillions) of arithmetic operations per second (TOPS).
AMD Ryzen 5 8640HS AMD Ryzen 5 8640HS
6C 12T @ 3.80 GHz
16 (100%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
0 (0%)

Devices using this processor

AMD Ryzen 5 8640HS Intel Core Ultra 7 155U
Unknown Unknown

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