There is no definitive answer to this question as it depends on what you are looking for in a laptop. If you need a powerful laptop for gaming, then the Razer Blade Pro 17 is the most powerful option from Razer. It has an NVIDIA GeForce RTX 2070 Max-Q GPU and a Intel Core i7-9750H processor, making it capable of handling even the most demanding games. If you need a more portable option, then the Razer Blade Stealth 13 is the most powerful Ultrabook from Razer. It has a Intel Core i7-8565U processor and an NVIDIA GeForce MX150 GPU, which gives it enough power for most tasks while still being reasonably portable.