Microsoft’s forthcoming flagship notebook, the Surface Laptop Ultra, is drawing closer to release, but fresh details from an early hands-on encounter suggest the device’s ambitious hardware may be outpacing its current software readiness. Almost two months after the initial unveiling, and with the more affordable Surface Laptop 8 already reaching customers, a prototype evaluation offers the most revealing look yet at what Microsoft has been refining behind the scenes.
Prototype Hardware and Display Observations
A forum member posting under the handle Fouquin on TechPowerUp reports spending close to a month with an engineering sample labeled EV1.5. The unit features a 15-inch Mini LED display that, while promising on paper, showed uneven local dimming behavior and lacked functional Nvidia G-Sync capability. Under sustained load, the prototype maintained approximately 35 W to 50 W of CPU power and 95 W to 105 W of GPU power, with corresponding temperature peaks of 98°C to 100°C on the processor and 80°C to 90°C on the graphics side.
Driver Instability and Software Hurdles
The evaluation unit booted with outdated Windows-on-ARM graphics drivers from November 2025, which Fouquin says led to erratic GPU clock behavior, frequent stuttering, and repeated system crashes during certain GPU compute tasks and in selected games. Installing newer 616.00 preview drivers did not resolve the core problems and even introduced an additional bug causing the screen to lock up during extended use.
Those same driver limitations disrupted AI benchmarking as well. CUDA-based tests reportedly failed to execute correctly, forcing a fallback to slower CPU-based and Vulkan Compute paths. Gaming stability also suffered, with titles such as Helldivers 2 causing hard crashes after only a few minutes of play.
Early Pricing Expectations
On the pricing front, Fouquin speculates that the Surface Laptop Ultra could start at $2,799 for a configuration with 24 GB of RAM and 512 GB of storage, while higher-tier versions with 128 GB of memory may exceed $4,499. These figures are clearly labeled as predictions rather than confirmed retail positioning. The central takeaway from the prototype experience is that Microsoft is packing notably strong hardware into the Surface Laptop Ultra, but for now its true potential remains constrained by software that has yet to fully mature.
Sources: www.techpowerup.com, x.com