Intel Core Ultra 7 255HX: specs and benchmarks

Summary

Intel started Core Ultra 7 255HX sales 1 January 2025. This is a notebook processor primarily aimed at home systems.

Compatibility-wise, this is FCBGA2114 processor with a TDP of 55 Watt. It supports DDR5-6400 memory.

Primary details

Core Ultra 7 255HX processor market type (desktop or notebook), architecture, sales start time and pricing.

Place in the ranking	not rated
Place by popularity	not in top-100
Market segment	Laptop
Release date	1 January 2025 (less than a year ago)

Detailed specifications

Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.

Physical cores	20 (Icosa-Core)
Performance-cores	8	of 60 (Xeon w9-3595X)
Efficient-cores	12	of 16 (Core i9-13900K)
Threads	20
Boost clock speed	5.2 GHz	of 6.2 GHz (Core i9-14900KS)
L3 cache	30 MB	of 1152 MB (EPYC 9684X)
64 bit support	+

Compatibility

Information on Core Ultra 7 255HX compatibility with other computer components and devices: 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.

Socket	FCBGA2114
Power consumption (TDP)	55 Watt	of 500 Watt (Xeon 6960P)

Technologies and extensions

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

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+
Enhanced SpeedStep (EIST)	+
Speed Shift	+
Turbo Boost Technology	2.0
Idle States	+
Thermal Monitoring	+
Turbo Boost Max 3.0	+
Deep Learning Boost	+
Supported AI Software Frameworks	OpenVINO™, WindowsML, DirectML, ONNX RT, WebNN

Security technologies

Processor technologies aimed at improving security, for example, by protecting against hacks.

TXT	+
EDB	+
Secure Key	+
OS Guard	+

Virtualization technologies

Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.

VT-d	+
VT-x	+
EPT	+

Memory specs

Types, maximum amount and channel number of RAM supported by Core Ultra 7 255HX's memory controller. Depending on the motherboard, higher memory frequency may be supported.

Supported memory types	DDR5-6400
Maximum memory size	192 GB	of 6 TiB (EPYC 9124)
Max memory channels	2	of 12 (Xeon Platinum 9221)

Graphics specifications

General parameters of a GPU integrated into Core Ultra 7 255HX.

Integrated graphics card	Intel® Graphics
Quick Sync Video	+
Graphics max frequency	1.85 GHz

Graphics interfaces

Available interfaces and connections of Core Ultra 7 255HX's integrated GPU.

Number of displays supported

4

Graphics image quality

Maximum display resolutions supported by Core Ultra 7 255HX's integrated GPU, including resolutions over different interfaces.

Max resolution over HDMI 1.4	4K @ 60Hz (HDMI 2.1 TMDS) 8K @ 60Hz (HDMI2.1 FRL)
Max resolution over eDP	3840x2400 @ 120Hz
Max resolution over DisplayPort	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core Ultra 7 255HX's integrated GPU, sometimes API versions are included.

DirectX	12
OpenGL	4.5

Peripherals

Specifications and connection types of supported peripherals.

PCIe version	5.0 and 4.0
PCI Express lanes	24	of 128 (EPYC 7551P)

Benchmark performance

Single-core and multi-core benchmark results of Core Ultra 7 255HX. Overall benchmark performance is measured in points in 0-100 range, higher is better.

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