Mystery reviewer tests Nvidia RTX Spark prototype in Microsoft Surface Laptop Ultra

Mystery reviewer 'finds' Nvidia RTX Spark prototype laptop and puts it through its paces -- Microsoft Surface Laptop Ultra with Nvidia N1X chip shows promise, though prototype warts are still quite visible

The machine displays potential, but it definitely needs to be in the oven a good while longer. Everyone loves previews of pre-release hardware that just happened to fall off the back of a truck -- particularly when it's a piece of kit that's been lighting up news headlines. Fouquin, a TechPowerUp reader, "accidentally" stumbled upon a Microsoft Surface Laptop Ultra prototype that ensconces an Nvidia RTX Spark N1X SoC. As a quick recap, the N1X is supposed to herald a generation of "AI laptops", meaning it's an alternative to the RTX Spark desktop, and to the Macbook Pro. This is due to the fact that they're all designs with large pools of unified memory and competent GPUs, making them suitable for non-datacenter AI work. The N1X packs 10 MediaTek-designed ARM CPU cores in a 5p5e configuration with multi-threading for 20 threads total, plus a GPU purportedly equivalent to a desktop RTX 4070 or a mobile RTX 5070. It can be wired up to 128 GB of LPDDR5X onboard in a unified pool, though the tested machine only has 24 GB. Fouquin notes the limitations of their "review" and notes they're not an AI person, though they tried running the Phoronix AI test suite nonetheless. This yielded a mixed bag of results, as very few tests would reliably work, seemingly due to pre-production drivers. Some Vulkan tests did run properly, and the reported performance appears to be indeed in the ballpark of an RTX 4070, though there are two very important caveats. First, this system and its drivers appear to be very buggy and unoptimized, particularly around power management. Fouquin says the system came with ancient 591.33 drivers from November 2025, eventually upgraded to 616.00 preview drivers with CUDA and Vulkan support. Apart from that, the tester found the machine's TDP spends and power plans behaving erratically, and none of the Phoronix CUDA tests produced results. Second, head-to-head benchmarks are hard to come by, as RTX-series desktop cards have limited pools of VRAM compared to the 24 GB on the test machine. All told, there's a fair chance that final hardware might perform better, especially considering this pre-production machine displayed many outstanding issues with the LCD display, idle current draw, and that plugging it in or running it from battery didn't make any difference. Interestingly, despite the 616.00 drivers adding features, performance actually took a significant turn for the worse. The Cinebench 2024 multi-threaded CPU test produced a result of 1386 points, trailing the 12-core Macbook M4 Pro, while Cinebench 2026 yielded 5771, a fair bit behind the Apple M4 Max. Fouquin did run some GPU tests, and the best results in 3DMark were with the older drivers. Port Royal showed 26-31 FPS on older drivers, while Nomad got 20-21 FPS. Meanwhile, Unigine Superposition actually improved with the 616.00 software, netting a maximum of 56-58 FPS. Compared to desktop cards, those results would roughly match RTX 3060 or RTX 3060 Ti, once again underscoring the pre-release nature of the Nvidia drivers and related software. As if more illustration was needed, the Balanced power plan almost always produced the best results. The story isn't much different in gaming, as Fouquin says that while most of their library of games ran fine, the performance was very sluggish, with multiple-second stutters and with GPU clock speed "bouncing all over the place." Helldivers 2 would outright crash the system, as did the GPGPU integer tests. Fouquoin believes these are all issues specific to this particular implementation of the N1X rather than a problem with the platform altogether. It's worth adding that presumably the games ran under the ARM emulation layer, which can introduce its own set of issues. N1X chip and fixable warts aside, Fouquin actually liked the machine, remarking on the high build quality, the keyboard feel, touchpad input, and display quality. Given there were previous claims the machine would be serviceable, Fouquin put those to the test and opened it, finding that while that claim is technically true, "many snap-on thin aluminum sheet panels covering all the primary components (even encasing the SSD) means actually attempting to service the laptop will lead to much bending and/or breaking." Here's to hoping that this too is fixed before final release. Follow Tom's Hardware on Google News, or add us as a preferred source, to get our latest news, analysis, & reviews in your feeds.

Tech enthusiast finds RTX Spark-powered Microsoft Surface Laptop Ultra, delivers first 'review'

In a forum post titled 'I've Spent A Month With NVIDIA's RTX Spark in Microsoft's Surface Laptop Ultra,' a TechPowerUp forum user by the name of Fouquin details how they've been in possession of an RTX Spark-powered Microsoft Surface Laptop Ultra laptop for about a month. With that, they're ready to share their "review" of the device, albeit with benchmarks and analysis based on the recent RTX Spark 616.00 preview driver NVIDIA released for developers, which added CUDA 13.4, OpenGL, and Vulkan support. Formally announced at Computex 2026, RTX Spark refers to NVIDIA's N1X Arm-based CPU and RTX Blackwell GPU all-in-one chip that's set to power a new wave of powerful AI-ready premium Windows on Arm laptops and mini PCs on track for release later this year. With an optimized version of Windows, up to 128GB of unified memory, and powerful graphics reportedly on par with a desktop GeForce RTX 4070, there's a lot of hype surrounding the arrival of these RTX Spark devices. This makes this early "review" notable; however, Fouquin notes in their post that they're not an AI person. Even so, they attempted to run the Phoronix AI test suite, albeit with some issues due to the pre-release nature of the software and drivers - with the Phoronix CUDA tests failing. That said, for the tests that did work, performance was in the range of the desktop GeForce RTX 4070. Elsewhere, running the Cinebench 2024 multi-threaded CPU test delivered a score of 1386 points, which puts the processor behind the MacBook M4 Pro. For the GPU, they ran a few 3DMark synthetic benchmarks like the ray-tracing focused Port Royal, which delivered 31 FPS, and the 4K-based Steel Nomad, which ran at around 22 FPS - results that are closer to the desktop GeForce RTX 3060 Ti than the RTX 4070. That said, these numbers could improve before the official release as there are some quirks with this pre-release sample. According to Fouquin, the G-SYNC features of the 3270x2180 (3:2) panel don't work, there are issues surrounding local dimming, and the various power profiles (Performance, Balanced, and Power Efficiency) are not working as expected. As for using the RTX Spark laptop to play games, Fouquin reports inconsistent and overall sluggish performance with stutters and the GPU clock speed "bouncing all over the place." As for the Microsoft Surface Laptop Ultra, the feedback is mostly positive, with impressive build quality and keyboard feel. With the first batch of RTX Spark laptops expected to launch in Fall 2026, we won't have to wait long to get our first proper review and look at the hardware.

NVIDIA RTX Spark Shows Strong Potential, But Early Prototype Leaves Plenty Of Performance On The Table

The NVIDIA N1X is surely powerful enough for the Windows-on-Arm market, but the current prototype software prevents it from reaching its full potential. User Puts Microsoft's Unreleased NVIDIA N1X-Equipped Surface Laptop Ultra To Test; Discovers Chip Being Held Back by Unfinished Drivers The NVIDIA RTX Spark laptops will debut in the coming weeks, and if you were wondering about their performance numbers, here is an early sneak peek by a TechPowerUp user, who got his hands on an early prototype from Microsoft. The user "Fouquin" says he found the Microsoft Surface Laptop Ultra with NVIDIA's RTX Spark N1X on the roadside, and since then, he has been playing around with the device. After a month-long hands-on with this unreleased laptop, the user shared his experience with the N1X Arm processor, which uses a 20-core Arm processor coupled with a Blackwell GPU, featuring 6144 CUDA Cores. The laptop was configured with 24 GB of unified memory and a 512 GB SSD, and as per the user, he tested the laptop with older Game Ready 591.33 drivers as well as the 616.00 preview driver, featuring CUDA 13.4 alongside updated OpenGL and Vulkan support. Gaming was one of the biggest disappointments during the testing. The user witnessed the GPU fluctuating between 1.5 GHz and 2.3 GHz, resulting in frame stutters every few seconds. The performance remained virtually unchanged whether the system was running on battery, a 64W power limit, or a 105W limit. This indicates that the prototype was inherently power constrained, due to which games like Helldrivers 2 and certain GPGPU integer tests suffered from crashes. Even with the newer 616.00 driver, it failed to deliver meaningful improvements in performance or stability. Instead, the idle power consumption increased noticeably, and the GPU stuttering persisted. As far as the performance in synthetic tests is concerned, the laptop delivered 123 points in single-core and 1,386 points in multi-core tests in Cinebench 2024. In Cinebench 2026, the scores were 540 and 5,771 points. The user also shared results for various 3D Mark applications as well as for AI workloads. Here, despite shipping with CUDA 1.34, the CUDA acceleration failed in the Phoronix AI benchmark suite, with workloads timing out before falling back to Vulkan Compute. The Vulkan tests completed successfully, but produced modest scores. Overall, although the user was impressed with the laptop's build quality, keyboard, and cooling design, he appeared disappointed with the current software experience. It appears that this prototype was far from retail-ready, but much of its untapped performance likely stems from immature firmware and drivers rather than from the NVIDIA N1X chip itself. Follow Wccftech on Google to get more of our news coverage in your feeds.