Core Ultra 7 255HX: specs and benchmarks
Aggregate performance score
Core Ultra 7 255HX provides good benchmark performance at 28.22% of a leader's which is a 96-core Ryzen Threadripper PRO 9995WX.
Contents
Summary
Intel started Core Ultra 7 255HX sales 13 January 2025. This is an Arrow Lake-HX architecture notebook processor primarily aimed at home systems. It has 20 cores and 20 threads, and is based on 3 nm manufacturing technology, with a max turbo frequency of 5200 MHz and an unlocked multiplier.
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 | 206 | |
| Place by popularity | not in top-100 | |
| Market segment | Laptop | |
| Power efficiency | 55.01 | of 100.00 (Ryzen Z1 Extreme) |
| Designer | Intel | |
| Manufacturer | TSMC | |
| Architecture codename | Arrow Lake-HX (2025) | |
| Release date | 13 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 72 (Xeon 6776P-B) |
| Efficient-cores | 12 | of 16 (Core Ultra 9 285K) |
| Threads | 20 | |
| Base clock speed | 2.4 GHz | of 4.7 GHz (Ryzen Threadripper PRO 9945WX) |
| Boost clock speed | 5.2 GHz | of 6.2 GHz (Core i9-14900KS) |
| L1 cache | 192 KB (per core) | of 80 KB (EPYC 9965) |
| L2 cache | 3 MB (per core) | of 2 MB (Xeon 6980P) |
| L3 cache | 30 MB (shared) | of 1152 MB (EPYC 9684X) |
| Chip lithography | 3 nm | |
| Die size | 243 mm2 | |
| Number of transistors | 17,800 million | of 135,240 million (EPYC 9684X) |
| 64 bit support | + | |
| Unlocked multiplier | + |
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.
| Number of CPUs in a configuration | 1 | of 8 (Xeon Platinum 8454H) |
| Socket | FCBGA2114 | |
| Power consumption (TDP) | 55 Watt | of 512 KB + 4 MB (Core i3-8121U) |
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 | + | |
| AVX | + | |
| vPro | + | |
| Enhanced SpeedStep (EIST) | + | |
| Speed Shift | + | |
| Turbo Boost Technology | 2.0 | |
| Hyper-Threading Technology | - | |
| 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 | + | |
| 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 | 256 GB | of 6 TiB (EPYC 9654) |
| 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 | 4096 x 2304 @ 60Hz (HDMI 2.1 TMDS)7680 x 4320 @ 60Hz (HDMI 2.1 FRL) | |
| Max resolution over eDP | 3840 x 2400 @ 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 144 (Threadripper PRO 7955WX) |
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.
Combined synthetic benchmark score
This is our combined benchmark performance rating.
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.
Cinebench 10 32-bit single-core
Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.
Cinebench 10 32-bit multi-core
Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.
Cinebench 15 64-bit multi-core
Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.
Cinebench 15 64-bit single-core
Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.
TrueCrypt AES
TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.
x264 encoding pass 2
x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.
x264 encoding pass 1
x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.
Send your test results of Core Ultra 7 255HX.
AMD equivalent
According to our data, the closest AMD alternative to Core Ultra 7 255HX is Ryzen 9 8940HX, which is faster by 3% and higher by 11 positions in our ranking.
Here are some closest AMD rivals to Core Ultra 7 255HX:
Similar processors
Here is our recommendation of several processors that are more or less close in performance to the one reviewed.
Recommended GPUs
People consider these graphics cards to be good for Core Ultra 7 255HX, according to our PC configuration statistics.
These are the fastest graphics cards for Core Ultra 7 255HX in our user configuration statistics. There is a total of 479 configurations using Core Ultra 7 255HX in our database.
