CPU Comparison
Intel Core Ultra 7 255HX vs Intel Core Ultra 9 285HX
A side-by-side comparison of specs, performance and value. The Intel Core Ultra 7 255HX is a high-performance mobile processor designed for enthusiast gaming laptops and portable workstations. Launched in early 2025, it is based on the Arrow Lake-HX architecture, featuring a robust 20-core configuration without Hyper-Threading. This setup includes 8 'Lion Cove' P-Cores and 12 'Skymont' E-Cores, operating across 20 threads. Manufactured on TSMC's 3nm process, the chip boasts a die size of 243 mm² and packs 17.8 billion transistors. It reaches impressive clock speeds, with a base frequency of 2.4 GHz and a maximum turbo of 5.2 GHz. The processor features an unlocked multiplier, a rare feature for mobile chips, allowing OEMs and extreme enthusiasts to push performance boundaries. With a base power of 55W and a maximum turbo power of 160W, it delivers desktop-class performance in a mobile form factor, paired with Arc Xe-LPG Graphics 64EU and a 13 TOPS NPU.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Rivals desktop CPUs in multi-threaded workloads like Cinebench and Blender.
Dominates multi-threaded benchmarks, rivaling desktop processors.
Gaming
Exceptional gaming performance when paired with a high-end discrete GPU, limited only by power constraints.
Delivers maximum frame rates in CPU-bound scenarios when paired with top-tier GPUs.
Virtualization
Excellent for running multiple VMs locally on a workstation laptop.
Great for local VMs, though dual-channel memory limits extreme server workloads.
Efficiency
Low efficiency at idle compared to standard H-series, designed for plugged-in performance.
Highly inefficient at idle and low loads compared to standard mobile chips.
Specialized Performance
AI / ML
- NPU 3 provides 13 TOPS
- Total platform AI is 33 TOPS
- Sufficient for basic background AI tasks but not heavy local LLMs
- 13 TOPS NPU included
- Heavy AI lifting relies on CPU and discrete GPU
- Total Int8 TOPS up to 36
Content Creation
Gaming
- High single-core boost clocks minimize bottlenecks
- Best paired with RTX 4080/4090 mobile GPUs
- Not intended for thin-and-light gaming
- Will not bottleneck RTX 4090 mobile
- Excellent 1% low frame rates due to high boost clocks
- Requires massive cooling to prevent thermal throttling
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Massive 20-core count
- Unlocked multiplier for mobile overclocking
- 20 PCIe Gen 5 lanes
- Excellent 5.2 GHz single-core boost
- Desktop-class performance
Cons
- High power consumption (160W turbo)
- Modest 13 TOPS NPU
- Requires massive cooling solution
- Poor battery life in laptops
Pros
- Exceptional 24-core multi-threaded performance
- Unlocked multiplier for enthusiast tuning
- 20 PCIe Gen 5 lanes for maximum I/O
- High 5.5 GHz turbo boost for single-threaded tasks
- Supports ECC memory for workstation scenarios
Cons
- Massive 160W power draw requires heavy cooling
- Poor battery life efficiency
- Integrated graphics are underwhelming for non-dGPU scenarios
- BGA socket prevents upgrades
Competitors & Alternatives
Intel Core Ultra 7 255HX
- AMD Ryzen 9 7945HXRival
Mobile
- AMD Ryzen 9 8945HXRival
Mobile
- Compare head-to-headIntel Core Ultra 9 285HXRival
Mobile
- Compare head-to-headIntel Core i9-14900HXRival
Mobile
- AMD Ryzen 9 7945HX3DRival
Mobile
Slightly higher base and boost clocks for similar price.
Compare head-to-headBetter choice for thin-and-light designs with good battery life.
Compare head-to-headPrevious generation, often available at a discount.
Compare head-to-head- AMD Ryzen 7 8845HSAlt
More efficient alternative for moderate gaming.
Intel Core Ultra 9 285HX
- AMD Ryzen 9 8945HXRival
Mobile (DTR)
- AMD Ryzen 9 7945HXRival
Mobile (DTR)
- Compare head-to-headIntel Core i9-14900HXRival
Mobile (DTR)
- Compare head-to-headApple M3 MaxRival
Mobile Workstation
- Compare head-to-headIntel Core Ultra 9 290HX PlusRival
Mobile (DTR)
- AMD Ryzen 9 7900HXAlt
Excellent alternative for pure gaming performance.
Slightly lower clocks but same core count, often cheaper.
Compare head-to-headBetter value for mid-range gaming laptops.
Compare head-to-head- AMD Ryzen 9 7945HX3DAlt
Features 3D V-Cache for unmatched gaming cache capacity.
If portability and battery life are more important.
Compare head-to-head
Our Verdict on Each
A powerhouse mobile CPU offering unlocked overclocking and massive multi-core throughput for desktop replacements.
Best for: Desktop replacement gaming laptop
Read the full reviewA true desktop replacement CPU delivering elite multi-core performance and overclocking headroom, provided the laptop can cool it.
Best for: The Core Ultra 9 285HX is highly recommended for users in the market for a top-tier gaming laptop or mobile workstation who need extreme multi-core performance without stepping up to a desktop. If your workflow involves software development, 3D modeling, or streaming while gaming, the 24 cores will handle the load effortlessly. However, prospective buyers must be aware of the thermal requirements; this chip demands a laptop with exceptional cooling to maintain its 160W turbo power. It is not suitable for students or professionals needing long battery life, as the 55W base power ensures it will deplete batteries quickly when unplugged. Ensure the laptop pairs this CPU with an RTX 4080 or 4090 class GPU to avoid a performance bottleneck. If you value overclocking and raw compute over portability, the 285HX is an excellent, future-proof investment.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core Ultra 7 255HX or Intel Core Ultra 9 285HX?
Based on our editorial ratings, the Intel Core Ultra 9 285HX comes out ahead with a score of 9/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.
Which is faster for gaming, Intel Core Ultra 7 255HX or Intel Core Ultra 9 285HX?
For gaming, the Intel Core Ultra 9 285HX leads with a gaming performance score of 98/100 among Intel Core Ultra 7 255HX and Intel Core Ultra 9 285HX.
Do Intel Core Ultra 7 255HX and Intel Core Ultra 9 285HX use the same socket?
Yes — all of these CPUs use the Intel BGA 2114 socket, so they share compatible motherboards.
Which has more cores?
The Intel Core Ultra 9 285HX has the most cores. Core counts: Intel Core Ultra 7 255HX (20 cores), Intel Core Ultra 9 285HX (24 cores).