Ryzen 9 9955HX3D vs Ultra 7 255HX

VS

Aggregate performance score

Core Ultra 7 255HX
2025
20 cores / 20 threads, 55 Watt
35.53
Ryzen 9 9955HX3D
2025
16 cores / 32 threads, 55 Watt
40.19
+13.1%

Ryzen 9 9955HX3D outperforms Core Ultra 7 255HX by a moderate 13% based on our aggregate benchmark results.

Primary details

Comparing processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking12377
Place by popularitynot in top-100not in top-100
Market segmentLaptopLaptop
Seriesno dataAMD Dragon Range (Zen 4, Ryzen 7045)
Power efficiency61.9670.08
DesignerIntelAMD
Architecture codenameArrow Lake-HX (2025)Fire Range-HX (Zen 5) (2025)
Release date1 January 2025 (less than a year ago)6 January 2025 (less than a year ago)

Detailed specifications

Core Ultra 7 255HX and Ryzen 9 9955HX3D basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores20 (Icosa-Core)16 (Hexadeca-Core)
Performance-cores8no data
Efficient-cores12no data
Threads2032
Base clock speed2.3 GHzno data
Boost clock speed5.2 GHz5.4 GHz
L1 cacheno data1.3 MB
L2 cache30 MB16 MB
L3 cache36 MB128 MB
Chip lithography3 nmno data
64 bit support++

Compatibility

Information on Core Ultra 7 255HX and Ryzen 9 9955HX3D compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

SocketFCBGA2114no data
Power consumption (TDP)55 Watt55 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core Ultra 7 255HX and Ryzen 9 9955HX3D. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2no data
AES-NI+-
Enhanced SpeedStep (EIST)+no data
Speed Shift+no data
Turbo Boost Technology2.0no data
Idle States+no data
Thermal Monitoring+-
Turbo Boost Max 3.0+no data
Deep Learning Boost+-
Supported AI Software FrameworksOpenVINO™, WindowsML, DirectML, ONNX RT, WebNN-

Security technologies

Core Ultra 7 255HX and Ryzen 9 9955HX3D technologies aimed at improving security, for example, by protecting against hacks.

TXT+no data
EDB+no data
Secure Key+no data
OS Guard+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core Ultra 7 255HX and Ryzen 9 9955HX3D are enumerated here.

VT-d+no data
VT-x+no data
EPT+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core Ultra 7 255HX and Ryzen 9 9955HX3D. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR5-6400no data
Maximum memory size192 GBno data
Max memory channels2no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel® GraphicsAMD Radeon 610M ( - 2200 MHz)
Quick Sync Video+-
Graphics max frequency1.85 GHzno data

Graphics interfaces

Available interfaces and connections of Core Ultra 7 255HX and Ryzen 9 9955HX3D integrated GPUs.

Number of displays supported4no data

Graphics image quality

Maximum display resolutions supported by Core Ultra 7 255HX and Ryzen 9 9955HX3D integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.44K @ 60Hz (HDMI 2.1 TMDS) 8K @ 60Hz (HDMI2.1 FRL)no data
Max resolution over eDP3840x2400 @ 120Hzno data
Max resolution over DisplayPort7680 x 4320 @ 60Hzno data

Graphics API support

APIs supported by Core Ultra 7 255HX and Ryzen 9 9955HX3D integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.5no data

Peripherals

Specifications and connection of peripherals supported by Core Ultra 7 255HX and Ryzen 9 9955HX3D.

PCIe version5.0 and 4.0no data
PCI Express lanes24no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating.

Ultra 7 255HX 35.53
Ryzen 9 9955HX3D 40.19
+13.1%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance. Other than that, Passmark measures multi-core performance.

Ultra 7 255HX 56989
Ryzen 9 9955HX3D 64464
+13.1%

Gaming performance

Pros & cons summary


Performance score 35.53 40.19
Physical cores 20 16
Threads 20 32

Ultra 7 255HX has 25% more physical cores.

Ryzen 9 9955HX3D, on the other hand, has a 13.1% higher aggregate performance score, and 60% more threads.

The AMD Ryzen 9 9955HX3D is our recommended choice as it beats the Intel Core Ultra 7 255HX in performance tests.

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Intel Core Ultra 7 255HX
Core Ultra 7 255HX
AMD Ryzen 9 9955HX3D
Ryzen 9 9955HX3D

Other comparisons

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Community ratings

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4.8 6 votes

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