CPU Comparison
Intel Core Ultra 7 255HX vs Intel Core Ultra 9 285H
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.
Highly responsive in multi-threaded apps, though limited by 45W thermal envelope.
Gaming
Exceptional gaming performance when paired with a high-end discrete GPU, limited only by power constraints.
The Arc 140T iGPU delivers surprisingly good 1080p gaming performance for an integrated solution.
Virtualization
Excellent for running multiple VMs locally on a workstation laptop.
Good for local VMs, though memory capacity is limited by mobile LPDDR5 implementations.
Efficiency
Low efficiency at idle compared to standard H-series, designed for plugged-in performance.
Excellent performance-per-watt, ensuring long battery life for light tasks.
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
- Combined platform TOPS up to 99
- Arc 140T GPU contributes heavily to AI workloads
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
- Arc 140T is a major step up over previous iGPUs
- Capable of medium-settings 1080p gaming
- Can be paired with low-end dGPUs for better performance
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
- Excellent performance-per-watt
- Strong integrated Arc 140T graphics
- Supports ultra-fast LPDDR5X-8400 memory
- Includes low-power E-cores for battery efficiency
- Good single-threaded performance at 5.4 GHz
Cons
- Locked multiplier
- Only 8 PCIe Gen 5 lanes from the CPU
- Lower core count than HX series
- Soldered to the motherboard (BGA)
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 285H
- AMD Ryzen AI 9 HX 370Rival
Mobile
- Compare head-to-headApple M4 ProRival
Mobile
- AMD Ryzen 9 8945HSRival
Mobile
- Compare head-to-headIntel Core Ultra 9 185HRival
Mobile
- Snapdragon X EliteRival
Mobile
- AMD Ryzen AI 9 365Alt
A strong mid-range alternative with excellent battery life.
- Alt
Great alternative for users within the Apple ecosystem.
Compare head-to-head - Intel Core Ultra 7 155HAlt
Previous generation alternative for cost savings.
- AMD Ryzen 7 8845HSAlt
Budget-friendly mobile option with good performance.
If you need more raw power and can sacrifice portability.
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 perfectly balanced 45W processor that delivers desktop-like responsiveness in portable form factors, bolstered by strong iGPU and AI capabilities.
Best for: The Core Ultra 9 285H is highly recommended for users seeking a premium, thin-and-light laptop capable of handling heavy workloads without sacrificing portability. If you are a content creator, software developer, or gamer who values battery life and a lightweight chassis, this processor strikes the perfect balance. Its 45W base power ensures it runs cooler than the HX series, making it ideal for laptops under 5 pounds. The inclusion of Arc 140T graphics means you can even do light gaming or video editing without a discrete GPU. However, if your primary use case is rendering complex 3D scenes or running sustained compiles for hours, you might be better served by a thicker HX-class laptop. Ensure the laptop utilizes LPDDR5X to maximize battery life, and consider pairing it with a mid-range discrete GPU if you plan on serious gaming. It is the ultimate choice for a do-it-all premium ultrabook.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core Ultra 7 255HX or Intel Core Ultra 9 285H?
Based on our editorial ratings, the Intel Core Ultra 9 285H comes out ahead with a score of 8.9/10. 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 285H?
For gaming, the Intel Core Ultra 9 285H leads with a gaming performance score of 85/100 among Intel Core Ultra 7 255HX and Intel Core Ultra 9 285H.
Which uses less power?
The Intel Core Ultra 9 285H has the lowest rated TDP. Power draw across these chips: Intel Core Ultra 7 255HX (55 W), Intel Core Ultra 9 285H (45 W).
Do Intel Core Ultra 7 255HX and Intel Core Ultra 9 285H use the same socket?
No. They use different sockets (Intel Core Ultra 7 255HX: Intel BGA 2114, Intel Core Ultra 9 285H: Intel BGA 2049), so each needs a compatible motherboard.
Which has more cores?
The Intel Core Ultra 7 255HX has the most cores. Core counts: Intel Core Ultra 7 255HX (20 cores), Intel Core Ultra 9 285H (16 cores).