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Intel Core Ultra 7 155HL specifications and in-depth review

Intel Core Ultra 7 155HL

Manufacturer: Intel

The Intel Core Ultra 7 155HL is a mobile-class processor designed around Intel's hybrid core architecture, combining six performance cores with eight efficiency cores under a single die. It operates within a 45W thermal design envelope, making it suited to thin-and-light laptops and compact systems where power management is a key consideration. The chip supports 64-bit computing, carries a maximum turbo frequency of 4.8GHz, and leverages big.LITTLE-style scheduling to balance workload distribution across its 22 threads.

On the memory side, the Core Ultra 7 155HL supports DDR5 at up to 5600MHz across two channels, with a maximum addressable capacity of 96GB. Its integrated Arc Xe-LPG 128EU GPU runs at a base clock of 300MHz, boosting up to 2250MHz, and exposes 1024 shading units alongside full DirectX 12 Ultimate and OpenGL 4.6 support for up to four simultaneous displays. The processor also includes a 24MB L3 cache, connects via PCIe 4.0, and ships with a broad set of instruction set extensions including AVX2, AES, and FMA3.

Pros
  • Supports DDR5 memory at up to 5600MHz across two channels, enabling fast data throughput for memory-intensive tasks
  • The integrated Arc Xe-LPG 128EU GPU can drive up to four displays simultaneously and boosts up to 2250MHz, offering meaningful graphical capability without a discrete card
  • A 24MB L3 cache helps reduce memory access latency across the 22-thread workload spread
  • Big.LITTLE hybrid core scheduling distributes tasks across performance and efficiency cores, allowing the chip to balance active workloads with lower-demand background processes
  • Broad instruction set support including AVX2, AES, and FMA3 makes the chip capable of handling vectorized, encrypted, and floating-point computations natively
  • The NX bit provides a hardware-level security boundary against certain memory-based code execution exploits
Cons
  • The multiplier is locked, so clock speed cannot be manually adjusted through multiplier overclocking
  • ECC memory is not supported, limiting reliability-critical or error-sensitive use cases
  • Base core clocks of 1.4GHz and 0.9GHz are relatively low, with sustained performance depending heavily on turbo boost conditions
  • A 45W TDP places thermal and power demands that may challenge passively cooled or ultra-compact system designs
Who is this for?

This processor is a solid fit for users building compact laptops or thin-and-light systems that still require capable integrated graphics, given the Arc Xe-LPG 128EU's ability to handle up to four simultaneous displays and boost to 2250MHz. The hybrid core architecture and 22-thread configuration make it well-suited for productivity-focused workloads such as content editing, multitasking, and office-intensive tasks where thread count and cache size matter. Users who need DDR5 memory support with up to 96GB capacity will also find it accommodating for memory-demanding applications like data processing or light creative work.

Who is this NOT for?

This chip is not a good match for users who require error-correcting memory, such as those running servers, scientific workstations, or any environment where data integrity under continuous load is critical, since ECC is not supported. Its locked multiplier makes it unsuitable for enthusiasts looking to push clock speeds beyond stock through manual overclocking. Additionally, systems designed around passive or minimal cooling may struggle with the 45W TDP under sustained workloads, so ultra-compact fanless builds are generally not a practical pairing for this processor.

General info:

CPU socket LGA 1851
Has integrated graphics ✓
Thermal Design Power (TDP) 45W
semiconductor size 7 nm
CPU temperature 105 °C
PCI Express (PCIe) version 4
Supports 64-bit ✓

The Intel Core Ultra 7 155HL uses the LGA 1851 socket and is built on a 7nm semiconductor process, reflecting a compact fabrication node for this class of processor. It carries a Thermal Design Power (TDP) of 45W and supports a maximum operating temperature of 105°C, establishing its thermal boundaries for sustained use. The chip supports 64-bit computing and includes integrated graphics, while its connectivity is handled through PCIe version 4, covering modern interface bandwidth requirements across compatible platforms.

Performance:

CPU speed 6 x 1.4 & 8 x 0.9 GHz
CPU threads 22 threads
turbo clock speed 4.8GHz
Has an unlocked multiplier ✕
L3 cache 24 MB
Uses big.LITTLE technology ✓
clock multiplier 14

The processor features a hybrid core layout running six cores at 1.4GHz and eight cores at 0.9GHz, with workload distribution managed through big.LITTLE technology that assigns tasks across the two core types accordingly. Across all cores, it provides a total of 22 threads and can reach a turbo clock speed of 4.8GHz under boosted conditions. A clock multiplier of 14 is in place, though the multiplier is locked, meaning manual overclocking through multiplier adjustment is not supported. Rounding out the performance profile is a 24MB L3 cache, which helps reduce memory latency for frequently accessed data.

Benchmarks:

Integrated graphics:

GPU clock speed 300 MHz
GPU name Arc Xe-LPG 128EU
GPU turbo 2250 MHz
GPU execution units 128
DirectX version DirectX 12 Ultimate
supported displays 4
OpenGL version 4.6
OpenCL version 3
texture mapping units (TMUs) 64
render output units (ROPs) 32
shading units 1024

The integrated GPU in this processor is the Arc Xe-LPG 128EU, featuring 128 execution units alongside 1024 shading units, 64 texture mapping units, and 32 render output units. It operates at a base clock of 300MHz and can boost up to 2250MHz under load, supporting up to four displays simultaneously. On the API side, it is compatible with DirectX 12 Ultimate, OpenGL 4.6, and OpenCL 3, covering a broad range of graphics and compute workloads within its integrated form factor.

Memory:

RAM speed (max) 5600 MHz
DDR memory version 5
memory channels 2
maximum memory amount 96GB
Supports ECC memory ✕

This processor supports DDR5 memory across two channels, with a maximum rated speed of 5600MHz and a ceiling of 96GB total addressable RAM. The dual-channel configuration allows for parallel memory access, contributing to overall data throughput within the supported spec. ECC memory is not supported, placing this chip within the standard consumer and mainstream computing segment rather than error-correcting workstation use cases.

Features:

instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.2, SSE 4.1
uses multithreading ✓
Has NX bit ✓

The processor includes multithreading support, allowing each core to handle multiple threads simultaneously for more efficient workload processing. It also incorporates the NX bit, a hardware-level security feature that helps prevent certain classes of malicious code execution by marking memory regions as non-executable. On the instruction set side, the chip supports a broad collection including AVX2, AES, and FMA3, alongside MMX, F16C, AVX, SSE 4.1, and SSE 4.2, enabling a wide range of vectorized, encrypted, and floating-point compute operations.

Final Verdict

The Intel Core Ultra 7 155HL presents a well-rounded profile for a mobile-class processor, combining a hybrid 22-thread core layout with DDR5 memory support and a capable integrated GPU in a single package. Its Arc Xe-LPG 128EU graphics, with support for four displays and a broad set of compute APIs, give it a meaningful edge for users who rely on integrated graphics for productivity and light creative tasks. While the locked multiplier and absence of ECC memory define clear boundaries around its intended use, those constraints are consistent with its target audience. For users seeking a balanced mix of threaded performance, modern memory bandwidth, and integrated visual output within a 45W thermal window, the Core Ultra 7 155HL represents a coherent and practical choice.

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