Microsoft's Windows and Surface event starts at 10 am PT/ 1 pm ET – watch it live here for more on RTX Spark

Microsoft is set to host a Windows and Surface event today, revealing details about the Surface Laptop Ultra, which is powered by Nvidia's RTX Spark. The event, which begins at 10 am PT/1 pm ET/6 pm BST, will feature Microsoft CEO Satya Nadella, Windows and Devices chief Pavan Davuluri, and Nvidia CEO Jensen Huang.

Nvidia unveiled RTX Spark in June. Its high-end configuration boasts a 20-core Arm CPU developed with MediaTek, 6,144 CUDA cores, and up to 128GB of unified LPDDR5X memory. Nvidia asserts that the top model delivers one petaflop of FP4 AI performance and integrated graphics on par with an RTX 5070 laptop GPU. The performance is said to remain nearly identical whether the device is plugged in or used on battery power, a significant improvement compared to traditional gaming laptops.

The first RTX Spark laptops and desktops are expected to launch in October, alongside a more affordable laptop chip featuring an 18-core CPU and 5,120 CUDA cores. Major manufacturers, including Dell, HP, Asus, MSI, Lenovo, and Acer, are backing the platform alongside Microsoft. RTX Spark also incorporates DLSS, ray tracing, and G-Sync support, with gaming giants EA, Ubisoft, and Microsoft committing to provide gaming-related assistance.

Microsoft has confirmed that the Surface Laptop Ultra will feature a 15-inch mini-LED touchscreen with a 3:2 aspect ratio, offering up to 2,000 nits of peak HDR brightness. The device is less than 18mm thick and weighs under 4.5 pounds, equipped with USB-A, USB-C, HDMI, a full-size SD card reader, and a user-serviceable SSD. However, the pricing details remain undisclosed, with reports suggesting that the entry-level 18-core model may start at over $2,000.

More revelations on Windows features, such as locally running AI agents and performance enhancements, are anticipated during the event.