Intel Core Ultra 7 255HX vs AMD Ryzen 9 9955HX — Specifications, performance, tests

Differences
Specifications Benchmarks Testimonials

Differences

Reasons to consider
Intel Core Ultra 7 255HX

Report a bug

More number of cores

4 more cores

20 16

Reasons to consider
AMD Ryzen 9 9955HX

Report a bug

Higher clock speed

Around 4% better clock speed

2.5 GHz 2.4 GHz
Higher turbo clock speed

Around 4 % higher specified turbo frequency

5.4 GHz 5.2 GHz

Specifications

Technical data

Intel Core Ultra 7 255HX

AMD Ryzen 9 9955HX

CPU family and group

Background information about the processors being compared, series, generation and market segment.

Family

Intel Core Ultra Series 2 Ryzen
Segment

Mobile Mobile
Form Factor

- Laptops / Desktops
Series

- Ryzen 9000 Series

CPU Technical specs

Core counts, threads, cache and clock modes describe the CPU configuration. Performance depends on the workload and comparable measured results.

CPU Cores

20 16
CPU Threads

20 32
E-core Base Clock

1.8 GHz -
Efficient Cores

12 -
Low Power Efficient-cores

0 -
Max. Boost Clock

5.2 GHz 5.4 GHz
P-core Base Clock

2.4 GHz -
Performance Cores

8 -
Base Frequency

- 2.5 GHz
Overclocking

- Yes

IGPU

Internal Graphics does not affect the performance of the CPU, performs the work of the graphics card in its absence or on mobile devices.

GPU name

Intel Graphics AMD Radeon 610M
GPU Turbo

1850 MHz -
GPU Frequency

- 2200 MHz
Graphics Cores

- 2

Memory specs & PCI

Types, channel quantity of RAM supported by AMD Ryzen 9 9955HX and Intel Core Ultra 7 255HX. Depending on the motherboards, higher or lower memory frequencies may be supported.

Max. Memory

256 GB -
Memory channels

2 2
Memory type

Up to DDR5 6400 MT/s DDR5
PCIe

- PCIe 5.0

Thermal Management

Compare the TDP requirements of TDP Intel Core Ultra 7 255HX and AMD Ryzen 9 9955HX Power specifications describe different manufacturer limits. TDP, base power and maximum turbo power are separate values; they do not establish measured system consumption.

Maximum Turbo Power

160 W -
Minimum Assured Power

45 W -
TDP (PL1 / PBP, legacy combined label)

55 W -
Configurable TDP

- 55-75 W
Default TDP

- 55 W
Maximum Operating Temperature

- 100 °C

Technologies and extensions

Architecture, interfaces, additional instructions supported by Intel Core Ultra 7 255HX and AMD Ryzen 9 9955HX, virtual machine technologies and process technology.

L3-Cache

30 MB 64 MB
Official specification sheet

https://cdrdv2-public.intel.com/851467/Intel-Core-Ultra-Series1-Series2-Series3-Comparison.pdf -
Release date

Q1/2025 2025
Socket

FCBGA2114 FL1
Availability window (manufacturer)

- First half of 2025
Codename

- Fire Range
Date evidence scope

- Manufacturer-announced OEM/board availability window; exact first shipment is not established by this source.
L2-Cache

- 16 MB
Technology

- TSMC 4nm FinFET

Benchmarks

Performance tests CPUs

Shared tests with results for both models: 4

Blender Cycles

Each row uses one Blender version, operating system and compute backend.

Test and settings	Intel Core Ultra 7 255HX	AMD Ryzen 9 9955HX	Result difference¹
Blender 5.2.0 / CPU / Windows	380.474848 samples/min Submissions: 18	637.665491 samples/min Submissions: 24	+67.6 %
Blender 5.1.1 / CPU / Windows	388.979486 samples/min Submissions: 9	604.902745 samples/min Submissions: 5	+55.5 %
Blender 4.5.0 / CPU / Windows	396.987215 samples/min Submissions: 37	553.377444 samples/min Submissions: 18	+39.4 %
Blender 4.4.0 / CPU / Windows	393.445339 samples/min Submissions: 12	515.911184 samples/min Submissions: 13	+31.1 %

¹ Difference of the second result relative to the first in that row. No percentage is calculated for different upscaling algorithms. This compares published results, not a universal performance index.

Individual model tests

These results have no shared test of both models with the same version and settings. They are shown separately without a percentage difference.

Intel Core Ultra 7 255HX

Blender 4.4.0 / CPU / Linux 390.476071 samples/min
Blender 5.1.0 / CPU / Windows 423.52739 samples/min

AMD Ryzen 9 9955HX

Blender 4.2.0 / CPU / Windows 540.764596 samples/min

Individual system tests

Results were obtained on the reported systems. Test versions and settings remain separate; incomplete conditions do not support calculated model performance differences.

Cinebench 2026 / multiple threads

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	8015 points	System: Chuwi Gamebook, R9 9955HX via Chuwi CPU / power label: R9 9955HX 110 W / 110 W Graphics: GeForce RTX 5070 Ti Laptop 140 W 1515 / 1750 MHz 12 GB RAM: 32 GB Exact test build and complete conditions are unreported; no ranking position.

Cinebench 2026 / single thread

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	525 points	System: Chuwi Gamebook, R9 9955HX via Chuwi CPU / power label: R9 9955HX 110 W / 110 W Graphics: GeForce RTX 5070 Ti Laptop 140 W 1515 / 1750 MHz 12 GB RAM: 32 GB Exact test build and complete conditions are unreported; no ranking position.

Cinebench 2024 / multiple threads

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	1918 points	System: Chuwi Gamebook, R9 9955HX via Chuwi CPU / power label: R9 9955HX 110 W / 110 W Graphics: GeForce RTX 5070 Ti Laptop 140 W 1515 / 1750 MHz 12 GB RAM: 32 GB Exact test build and complete conditions are unreported; no ranking position.

Cinebench 2024 / single thread

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	129 points	System: Chuwi Gamebook, R9 9955HX via Chuwi CPU / power label: R9 9955HX 110 W / 110 W Graphics: GeForce RTX 5070 Ti Laptop 140 W 1515 / 1750 MHz 12 GB RAM: 32 GB Exact test build and complete conditions are unreported; no ranking position.

RandomX / XMRig 6.26.0 / 1M / 16 threads / windows

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	11943.578535 H/s	RandomX / XMRig 6.26.0 / 1M / 16 threads / windows System RAM: 32 GB OS: Windows NT 10.0 Motherboard: LENOVO / LNVNB161216 Duration: 83.727 s User-submitted run; tuning and power settings are incomplete.

RandomX / XMRig 6.25.0 / 10M / 20 threads / windows

Model	Result	Reported conditions
Intel Core Ultra 7 255HX	10096.940728 H/s	RandomX / XMRig 6.25.0 / 10M / 20 threads / windows System RAM: 32 GB OS: Windows NT 10.0 Motherboard: LENOVO / LNVNB161216 Duration: 990.399 s User-submitted run; tuning and power settings are incomplete.

Cinebench R23 / multiple threads

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	36127 points	System: Chuwi Gamebook, R9 9955HX via Chuwi CPU / power label: R9 9955HX 110 W / 110 W Graphics: GeForce RTX 5070 Ti Laptop 140 W 1515 / 1750 MHz 12 GB RAM: 32 GB Exact test build and complete conditions are unreported; no ranking position.

Cinebench R23 / single thread

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	2174 points	System: Chuwi Gamebook, R9 9955HX via Chuwi CPU / power label: R9 9955HX 110 W / 110 W Graphics: GeForce RTX 5070 Ti Laptop 140 W 1515 / 1750 MHz 12 GB RAM: 32 GB Exact test build and complete conditions are unreported; no ranking position.

Cinebench R20 / multiple threads

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	14186 points	System: Chuwi Gamebook, R9 9955HX via Chuwi CPU / power label: R9 9955HX 110 W / 110 W Graphics: GeForce RTX 5070 Ti Laptop 140 W 1515 / 1750 MHz 12 GB RAM: 32 GB Exact test build and complete conditions are unreported; no ranking position.

Cinebench R20 / single thread

Model	Result	Reported conditions
AMD Ryzen 9 9955HX	851 points	System: Chuwi Gamebook, R9 9955HX via Chuwi CPU / power label: R9 9955HX 110 W / 110 W Graphics: GeForce RTX 5070 Ti Laptop 140 W 1515 / 1750 MHz 12 GB RAM: 32 GB Exact test build and complete conditions are unreported; no ranking position.