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Shopping for a new Intel laptop and feeling thoroughly confused? You’re not the only one. Intel’s rebranded Core Ultra CPU line is difficult to understand, especially when it comes to choosing between a Core Ultra H or U processor—but there are a couple of ways to tell the difference.
Intel Core Ultra U vs. Ultra H: What’s the Difference?
Specification
Intel® Core™ Ultra 7 165U Processor
Intel® Core™ Ultra 7 155U Processor
Intel® Core™ Ultra 5 135U Processor
Intel® Core™ Ultra 5 125U Processor
Processor Cores
12 (2+8+2)
Processor Threads
Intel® Smart Cache (LLC)
P-core Max Turbo Frequency
Up to 4.9 GHz
Up to 4.8 GHz
Up to 4.4 GHz
Up to 4.3 GHz
E-core Max Turbo Frequency
Up to 3.8 GHz
Up to 3.6 GHz
Max Memory Speed
DDR5-5600 | LPDDR5/x-7467
Max Memory Capacity
64 GB (LP5) | 96 GB (DDR5)
Processor Base/Max Turbo Power
Before Intel adopted the new naming scheme, the number after the “i” (like i5 or i7) was used to indicate the level of performance, with i7 usually faster than i5. However, withthe new Core Ultra lineup, the letter at the end of the processor name (if it’s H or U) matters more regarding performance. In short, Intel H-Series processors are designed for performance, while Intel U-Series processors are designed for power efficiency. To make things clearer, here’s how the processors rank based on their performance levels, from the least to the highest performing:
For comparison, let’s look at the Core Ultra 5-125U and Core Ultra 7-155U. While you’d expect the Core Ultra 7 to outperform the Core Ultra 5, the difference is minimal—around a 5% improvement. However, switching from the Core Ultra 7-155U to the Core Ultra 7-155H, you get a significant performance boost (around 20%).
Intel® Core™ Ultra 7 165H Processor
Intel® Core™ Ultra 7 155H Processor
Intel® Core™ Ultra 5 135H Processor
Intel® Core™ Ultra 5 125H Processor
16 (6+8+2)
14 (4+8+2)
Up to 5.0 GHz
Up to 4.6 GHz
Up to 4.5 GHz
Processor Max Turbo Power
64 W, 115 W
Processor Base Power
But what makes Core Ultra H so much faster? This is because you get 4 or 6 Performance (P-cores) depending on the specific model, whereas all Core Ultra U processors only have 2 P-cores. And that’s not it. With Core Ultra H, you also get:
Additionally, if you were to pick the Core Ultra H, you wouldn’t be sacrificing power efficiency despite more P-cores and higher Turbo Boost frequency. All the Core Ultra processors (whether it’s H or U series) share the same number of Efficient (E-cores—8) and Low Power (LP-E cores—2) running exactly at the same clock speed. That means your laptop will useenergy-efficient E-cores when doing lighter tasksand only invoke P-cores under load.
Who Should Buy an Intel Core Ultra U Series?
The Core Ultra U series is sufficient if you’re looking for a sleek and slim laptop primarily for web browsing, watching movies, or word processing. Also, it’s best to stick with the Intel Core Ultra 5-125U, as the performance of the Core Ultra 7-155U is roughly the same.
Who Should Buy an Intel Core Ultra H Series?
The Core Ultra H series is better if your main focus is productivity, running resource-intensive applications, or handling tasks like video rendering across multiple monitors. Plus, it has powerful integrated Intel Arc Graphics, capable of running modern games at a decent frame rate.
Why the Intel Core Ultra H Is the Better Option
So, when comparing the two, the Core Ultra H is the better choice, even if you don’t plan to use your laptop for demanding tasks. Especially when there is only a slight price difference. For example, you’re able to pick up anInspiron 16 2-in-1 Laptopwith Intel Core Ultra 5-125U for $749, while the Intel Core Ultra 7-155H costs $799.
You might think the Core Ultra U offers much better battery life, but that’s not entirely true. you may expect only an extra couple of hours of battery life—nothing more. The reason is that Intel designed the Core Ultra specifically for high-performance mobile computing, with power efficiency in mind. Whether you choose the Core Ultra H or U, you’ll benefit from the same number of E-cores, meaning that your everyday tasks consume roughly the same amount of energy, whether it’s Core Ultra H or U. However, with the Core Ultra H, you get more P-cores that you can tap into whenever needed, and not to forget, much more powerful integrated Arc graphics.
Also, the Core Ultra H offers better long-term compatibility. A few years down the road, your laptop will perform smoothly even when applications and system software become more complex.
