Core Ultra 7 155H exhibiting throttling behavior by up to 25 percent on smaller laptop models

ULV U-series processors are generally more common on smaller laptops while H-series options are more common on larger laptops. When you put H-series options on smaller laptops, however, performance sacrifices become more likely. In this case, certain 14-inch laptops running on the Core Ultra 7 155H can throttle by up to 25 percent when compared to larger laptops with the same CPU.

Our graph below compares the 13-inch MSI Summit E13 AI Evo, 14-inch Schenker Key 14, 14-inch Lenovo ThinkBook Plus Gen5 Hybrid, 13.5-inch Framework Laptop 13.5, and 14-inch Honor MagicBook Art 14 each with the Core Ultra 7 155H. Almost all of them would throttle by 20 percent or more after just one loop into our CineBench R15 xT stress test to represent poor Turbo Boost sustainability. In comparison, the 16-inch Eurocom Blitz Ultra 16 would hold both faster and steadier results throughout the stress test.

The only exception to the above is the 14-inch Schenker which integrates a GeForce RTX 4060. Since this is a gaming laptop, its cooling solution was designed to be more effective than on most other 14-inch laptops at the cost of both a thicker profile and heavier weight. The processor would throttle less significantly as a result.

If you do a lot of processor-heavy workloads, then you may want to consider the size of the laptop and not just the processor on the spec sheet as the larger option can potentially run the same Core Ultra 7 155H up to 70 percent faster in the extreme case with the Honor MagicBook Art 14.