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Surface Pro 4

The Pro 4 is a 2-in-1 detachable PC developed by as part of its Surface line of tablet and devices, featuring a versatile design that allows it to function as both a tablet and a when paired with an optional Type Cover keyboard. Released on October 26, 2015, following its announcement on October 6, 2015, at a event in , it succeeded the Surface Pro 3 and introduced refinements such as a thinner chassis, an improved kickstand, and enhanced compatibility with the Surface Pen stylus for inking and drawing. The device was positioned as a premium productivity tool, emphasizing portability and performance for professionals, students, and creators, with pricing starting at $899 for the base model. Key hardware specifications include a 12.3-inch PixelSense with a aspect ratio and 2736 × 1824 pixel resolution at 267 pixels per inch, protected by Corning 4 and supporting 100% color gamut for accurate visuals. It is powered by sixth-generation processors, with options for a fanless Core m3-6Y30, Core i5-6300U, or Core i7-6650U, paired with 4 GB, 8 GB, or 16 GB of LPDDR3 RAM and PCIe SSD storage ranging from 128 GB to 1 TB. The Surface Pro 4 measures 292.1 × 201.4 × 8.45 mm (11.5 × 7.9 × 0.33 inches) and weighs 786 g (1.75 lbs) for most configurations, making it lighter and slimmer than its predecessor while incorporating a built-in that adjusts up to 150 degrees for multiple usage modes. Additional features include dual cameras—an 8-megapixel autofocus rear camera and a 5-megapixel , both capable of 1080p video recording—along with ports such as a full-size , , microSDXC card reader, and 3.5 mm headphone jack. It ships with Pro, supports 802.11ac and 4.0, and offers up to 9 hours of battery life for video playback under ideal conditions, though real-world usage often yields 4 to 6 hours depending on workload. Accessories like the Surface Pen with 1024 levels of pressure sensitivity and the detachable Type Cover keyboard, sold separately, enhance its utility for note-taking, typing, and creative tasks. Upon release, the Surface Pro 4 received positive reviews for its refined build quality, vibrant display, and versatile , earning scores like 8.5 out of 10 from for balancing power and portability. However, critics noted drawbacks including shorter-than-expected battery life, the additional cost of accessories, and occasional issues like screen flicker in some units, which addressed through replacements and updates. By 2025, support for the device has ended, with ceasing Surface driver and updates on November 13, 2021, though security updates for continued until October 14, 2025.

Development and launch

Announcement

Microsoft unveiled the Surface Pro 4 on October 6, 2015, during its devices event held at the State Armory in . The event, attended by media and industry figures, highlighted 's expanding hardware lineup alongside other announcements like the Surface Book and Lumia 950 smartphones. Positioned as "the tablet that can replace your ," the Surface Pro 4 was introduced as the successor to the Surface Pro 3, with emphasizing its role as a versatile 2-in-1 device for productivity and mobility. Key highlights included sixth-generation processors, delivering enhanced performance over the previous model's fourth-generation chips, and a claimed battery life of up to nine hours for video playback. The device featured a 12.3-inch PixelSense with a of 2736 × , supporting 100% of the color gamut for improved visuals. As a successor, it boasted a thinner profile at 8.45 mm (0.33 inches) compared to the Pro 3's 9.1 mm, and a lighter weight starting at 766 grams (1.69 pounds) for the base model. Microsoft teased initial pricing at the event, with the base configuration—featuring an m3 , 4 GB of , and 128 GB of —starting at $899. Higher-end options with i5 or i7 , up to 16 GB of , and up to 1 TB were also previewed, with pre-orders set to begin the following day and general availability planned for , 2015. This announcement underscored 's commitment to refining line's balance of tablet portability and functionality.

Release

Pre-orders for the Surface Pro 4 began on October 7, 2015, following its announcement, with general availability starting in the United States and Canada on October 26, 2015. The device was offered in various configurations at launch, starting at $899 for the entry-level model featuring an Intel Core m3 processor, 4 GB of RAM, and 128 GB SSD; mid-range options included the Core i5 with 4 GB RAM and 128 GB SSD at $999, while higher configurations such as the Core i5 with 8 GB RAM and 256 GB SSD were priced at $1,299. The top-end model available initially was the Intel Core i7 with 16 GB RAM and 512 GB SSD at $2,199, with the 1 TB SSD variant becoming widely available shortly after in select markets during November 2015. Global rollout commenced in the and , expanding to other regions including the and on November 12, 2015, through Microsoft's online store and authorized retailers. Initial demand led to stock shortages for popular configurations, particularly the mid-range Core i5 models, resulting in shipping delays into early 2016 due to high global interest and component supply constraints. The 4 was manufactured by in , with highlighting improvements in its processes to address the production and availability delays experienced with the preceding 3.

Design and hardware

Build and display

The Surface Pro 4 features a tablet-laptop hybrid design, consisting of a with an integrated for propping at variable angles and magnetic attachment for optional accessories like the Type Cover via pins. The device measures 11.5 by 7.93 by 0.33 inches (292.1 by 201.4 by 8.45 mm) and weighs 786 grams (1.73 pounds) for i5 and i7 models or 766 grams (1.69 pounds) for the m3 model without accessories, making it slightly thinner than its predecessor, the 3 at 0.36 inches (9.1 mm). Its chassis is constructed from a frame for durability and lightness, protected by 4 on the front display, while incorporating a vapor chamber cooling system to dissipate heat from internal components efficiently within the slim profile. The display is a 12.3-inch PixelSense —contrary to pre-announcement rumors of a 13-inch size—with a of 2736 by 1824 pixels at 267 pixels per inch () and a optimized for tasks like document viewing. It supports 10-point input for gestures and is calibrated for precise interaction with the Surface Pen, which offers 1024 levels of pressure sensitivity for natural drawing and note-taking. The , an improvement over earlier models with fixed angles, provides continuous adjustment across a 150-degree range for flexible viewing in , , or tablet modes.

Processor and storage

The Surface Pro 4 was equipped with sixth-generation Skylake , offering three configuration options to balance performance and power efficiency. The entry-level model featured the m3-6Y30, a dual-core with a base clock speed of 0.9 GHz and a maximum turbo frequency of 2.2 GHz, paired with Intel HD Graphics 515. Mid-range configurations used the i5-6300U, also dual-core, operating at a 2.4 GHz base clock and up to 3.0 GHz turbo, integrated with Intel HD Graphics 520. The top-tier option included the i7-6650U, a dual-core with a 2.2 GHz base and up to 3.4 GHz turbo boost, featuring Intel Iris Graphics 540 for enhanced visual performance. Memory configurations ranged from 4 GB to 16 GB of LPDDR3 , available in 4 GB, 8 GB, or 16 GB variants, all soldered directly to the for a compact , making upgrades impossible without specialized rework. Storage options included removable PCIe SSDs in capacities of 128 GB, 256 GB, 512 GB, or 1 TB, accessible by removing the rear for replacement or upgrades, unlike the fixed . The Core m3 model employed a fanless system to prioritize silence and efficiency, suitable for light tasks, while the i5 and i7 variants incorporated with a small to manage higher loads during intensive workloads. In benchmarks, the i7 configuration achieved multi-core Geekbench 4 scores of approximately 7,000 to 8,000, demonstrating solid performance for productivity applications like office suites, web browsing, and light content creation, though the integrated graphics limited it to casual gaming and not demanding titles. For security, the Surface Pro 4 included a discrete 2.0 chip, providing hardware-based encryption and secure key storage for enterprise environments, along with support for in its Skylake processors to enable protected enclaves for sensitive data processing. These features facilitated encryption and enhanced defenses against firmware attacks, though SGX required enabling for full utilization.

Battery and ports

The Surface Pro 4 is equipped with a 38.2 Wh lithium-polymer , designed to provide up to 9 hours of video playback under optimal conditions. In real-world mixed-use scenarios, such as web browsing, document editing, and light , battery life typically averaged 5 to 6 hours, with variations depending on the processor configuration and screen brightness. Higher-performance i5 or i7 models experienced shorter runtimes due to increased power draw during intensive tasks, while the lower-power Core m3 variant extended usage closer to 6 hours. The device's port selection emphasizes versatility for a 2-in-1 , including a single full-size port for connecting peripherals like external drives or printers, a for external monitor support up to at 60 Hz, a microSDXC supporting UHS-I speeds for media expansion, and a 3.5 mm headphone jack for audio output. Charging is handled via the proprietary Surface Connect port, which also supports data transfer and accessory connectivity, with full recharge times ranging from 2 to 4 hours using the included 45W power supply. Wireless connectivity includes 802.11ac for high-speed networking compatible with IEEE 802.11a/b/g/n standards, and 4.0 for pairing devices such as headphones or input accessories. The Surface Pro 4 lacks built-in cellular capabilities, relying instead on hotspots or optional docking solutions for expanded wired connectivity like Ethernet. For imaging, the device features a 5-megapixel capable of 1080p HD video recording, suitable for video calls and Windows Hello facial recognition, alongside an 8-megapixel rear-facing auto-focus camera also supporting 1080p video. Input options are limited to the and optional accessories, with no integrated or reader for .

Software and features

Operating system

The Surface Pro 4 launched with a 64-bit version of Windows 10 Pro pre-installed as its operating system, providing users with the full desktop experience optimized for both productivity and touch interactions. This edition included core Windows 10 features such as the touch-optimized , which allowed for resizable live tiles and easy navigation via finger or pen input, marking a significant evolution from the more rigid interface of Windows 8. Additionally, , the built-in virtual assistant, was integrated for voice-activated tasks like searching files, setting reminders, and controlling system settings, enhancing hands-free usability on the device's touchscreen. The default web browser, , offered improved performance for web browsing with support for extensions and annotations using the Surface Pen. A key feature of Windows 10 on the Surface Pro 4 was Continuum mode, which enabled seamless transitions between tablet and laptop configurations; when the Type Cover keyboard was detached, the interface automatically shifted to a full-screen, touch-first tablet mode, optimizing app layouts and hiding the taskbar for better mobile use, while reattaching it restored the traditional desktop view. The operating system was particularly optimized for pen input, with built-in support in apps like OneNote for natural handwriting-to-text conversion and ink annotations, alongside the Sketchpad app for freeform drawing and basic editing directly on the desktop. User interface adaptations included Snap Assist, which suggested and automatically filled adjacent screen space with other open apps when a window was snapped to the side or corner, facilitating efficient multitasking on the 12.3-inch display. The on-screen virtual keyboard saw enhancements over , featuring a more intuitive layout with , gesture-based corrections (like swiping to delete), and split-keyboard mode for comfortable thumb typing in tablet orientation. At launch, the Surface Pro 4 came bundled with a 30-day trial of (including Word, Excel, PowerPoint, and OneNote), allowing users to access productivity tools immediately upon setup. Pre-installed software also featured standard Windows 10 universal apps such as the Xbox app for gaming integration and social features, alongside utilities like for video calling, which was promoted and readily available from the Start menu for quick installation if not already present. These elements collectively provided a cohesive, out-of-the-box environment tailored for creative and professional workflows on the device's versatile hardware.

Updates and compatibility

The Surface Pro 4 shipped with Windows 10 version 1511 (November Update, build 10586). It received support for all subsequent Windows 10 feature updates, with mainstream support ending on October 13, 2020, and extended support concluding on October 14, 2025. Microsoft does not officially support Windows 11 on the Surface Pro 4, primarily because its 6th-generation Intel Core processors do not meet the minimum CPU requirements for the operating system. Although the device includes TPM 2.0 hardware and supports Secure Boot, these features alone are insufficient for compatibility. Unofficial installations of Windows 11 are possible using registry modifications to bypass hardware checks during setup, but they lack official validation and may encounter stability issues, such as intermittent Type Cover connectivity problems in versions 24H2 and 25H2. Additionally, no Microsoft-specific driver updates are provided for Windows 11 on this device. Firmware and driver support for the Surface Pro 4 followed Microsoft's lifecycle policy, with updates available for four years from its October 26, 2015 release date, ending on November 13, 2021. The last comprehensive driver and firmware package was released prior to this date, addressing components like the HD Graphics and Surface Integration drivers via . After October 14, 2025, free security updates for ended, though offers a paid Extended Security Updates (ESU) program providing critical and important updates for up to three additional years at $30 per year for consumers. No further Surface-specific firmware or driver enhancements are issued. In terms of compatibility, i5 and i7 models of the Surface Pro 4 can run version 23H2 through unofficial means with acceptable performance for basic tasks and no widespread reports of critical crashes, though advises against it due to potential unoptimized behavior and absence of tailored support. For extended usability beyond Windows 10's end of support, Linux distributions such as or are viable alternatives when using the linux-surface kernel, which provides drivers for touch, pen input, , and other hardware features.

Accessories

Type Cover

The Surface Pro 4 Type Cover is a detachable that magnetically attaches to the bottom edge of the device via a 6-pin connector, providing power and data connectivity without additional cables. It features a slim design measuring approximately 11.6 by 8.5 by 0.2 inches and weighing 0.65 pounds, adding minimal bulk while transforming the tablet into a laptop-like setup. The cover includes backlit keys for low-light use and a precision glass trackpad that supports gestures. Functionally, the Type Cover offers a full-sized keyboard with a dedicated function row (F1-F12), Windows shortcut keys, media controls, and brightness adjustments, along with a slot on the side for storing the compatible Surface Pen. Compared to the Surface Pro 3 version, it provides improved typing with 1.3 mm of key travel and a trackpad that is 40% larger for enhanced navigation accuracy. The keyboard folds 180 degrees backward to enable tablet mode, maintaining seamless integration with the device's ports. Available variants include the standard Type Cover, priced at $129 at launch, and the Signature Edition at $159, which adds an Alcantara fabric palm rest in colors such as black, , and red for a premium feel. Both are optimized for the Surface Pro 4 but remain compatible with later models like the Surface Pro 5, 6, and 7, though fit and alignment may vary slightly on newer devices. At launch, some users reported intermittent disconnects with the Type Cover, often resolved through firmware updates or driver reinstallations provided by Microsoft.

Surface Pen

The Surface Pen is a stylus accessory specifically designed for the Surface Pro 4, providing precise digital inking capabilities that integrate with the device's touchscreen. It magnetically attaches to the side of the Surface Pro 4 for secure storage and quick access, or can clip onto the Type Cover when attached. The pen features a replaceable tip for customized writing feel, 1,024 levels of pressure sensitivity for nuanced control, and tilt support to simulate shading effects like a traditional pencil. An eraser button on the opposite end allows for intuitive corrections, mimicking real-world drawing tools. Powered by a single that delivers up to one year of typical use, the Surface Pen incorporates palm rejection technology to ignore hand contact on the screen, enabling natural resting of the palm during writing or sketching without unintended inputs. It achieves low —approximately 21 milliseconds after software updates—for responsive real-time inking, and supports pairing to customize the top button for shortcuts, such as launching apps or right-clicking. The pen integrates seamlessly with Windows apps like OneNote, facilitating handwriting-to-text conversion and annotations through features later enhanced by Windows Ink. Relative to the stylus for the Surface Pro 3, which offered 256 levels of pressure , the Surface Pro 4's pen quadruples the sensitivity for more detailed artistic and note-taking precision, along with improved connectivity for button customization. Priced at $99 when sold standalone, the Surface Pen was frequently bundled with higher-end Surface Pro 4 configurations or education editions to provide a complete setup.

Issues

Hardware problems

The Surface Pro 4 experienced several documented reliability issues, particularly with its , , and display components. Overheating and performance throttling were common complaints in models equipped with i5 and i7 processors during intensive tasks such as or . The device's vapor chamber cooling system proved insufficient for sustained high loads, resulting in CPU temperatures exceeding 90°C and performance drops of up to 30% to prevent damage. This throttling was exacerbated by the thin , which limited airflow, and was noted in early reviews as a limitation compared to thicker laptops. acknowledged thermal behavior as normal but recommended adjusting power modes to "Recommended" to mitigate fan activation and heat buildup. Battery degradation was a widespread problem, with lithium-ion cells losing capacity rapidly after 2-3 years of use, often reducing runtime from the advertised 9 hours to 2-3 hours under typical workloads. Swelling was reported in a number of units, caused by gas buildup from electrolyte breakdown, which could lift the screen and pose safety risks. Microsoft offered free device replacements for swollen batteries through 2021, even for out-of-warranty units, via authorized service centers, but did not provide standalone battery swaps due to the glued-in design. Users were advised to avoid full discharges and keep charge levels between 20-80% to slow degradation. Screen issues included a known "scramble" defect affecting a small percentage of devices, where the flickered, shifted horizontally or vertically, or showed fuzzy, interlaced images—symptoms temporarily alleviated by touching the screen. This fault, unrelated to software, impacted all configurations and prompted to extend free replacements for three years from purchase date, with service taking 6-8 business days. Early batches also reported and backlight bleed, though these were less systemic and often resolved under . The occasionally failed to output video to external monitors, requiring port cleaning or replacement. Other hardware concerns involved mechanical wear on the hinges, which could loosen or break after regular use, compromising stability; replacement parts were available but required disassembly. SSD failures manifested as read/write errors after heavy usage (e.g., beyond 500GB written), with some units failing within two years due to controller issues in the soldered NVMe drives. Fan noise in cooled models was typically normal under load but could become grinding or excessive if bearings wore out or dust accumulated, signaling a need for cleaning or service.

Software limitations

The Surface Pro 4 experienced driver incompatibilities with its Type Cover accessory, particularly intermittent disconnections during sleep and wake cycles, which were resolved through a February 2016 that enhanced stability during power state transitions. Similarly, the Surface Pen exhibited lag and inconsistent responsiveness in certain applications following the installation of (Fall Creators Update), stemming from conflicts with updated touch and input drivers. Users attempting unofficial installations of on the Surface Pro 4 encountered core isolation errors due to incompatible legacy drivers preventing the activation of memory integrity, a key security feature. Additionally, the device lacks official optimizations for version 25H2, resulting in failures such as unreliable touchpad gestures for multitasking and . No official firmware updates have been provided to address -era security requirements, leaving such installations reliant on outdated drivers. Driver and firmware support for the Surface Pro 4 ended on November 13, 2021, meaning no new updates are available to resolve emerging software issues. With reaching end-of-support on October 14, 2025, devices remaining on that OS face increased vulnerability to unpatched exploits without further servicing. Other notable software bugs included Wi-Fi dropouts on 5GHz bands, often due to misconfigured preferred band settings in the wireless adapter properties, affecting connection stability on compatible networks. Early Windows 10 builds, such as version 1607, also caused Cortana integration glitches on the Surface Pro 4, including failure to launch or process voice commands post-upgrade.

Reception

Critical reviews

Upon its release in October 2015, the Surface Pro 4 received widespread praise from critics for its refined design and enhanced capabilities as a Windows hybrid device. CNET awarded it an 8.5 out of 10, calling it the "best Windows hybrid" due to its slimmer body, higher pixel density on the 12.3-inch display, and redesigned Type Cover keyboard. PCMag gave it 4 out of 5 stars (equivalent to 8 out of 10), highlighting the stellar display quality, snappy performance from the sixth-generation Intel Core processors, and battery life exceeding 10 hours in testing. Reviewers noted a significant performance leap over the Surface Pro 3, with Windows Central describing it as the best Surface yet for productivity tasks, thanks to improved multitasking and faster SSD speeds. The Surface Pen's accuracy and low latency were also commended, with PCMag emphasizing its precision for creative and note-taking applications. Critics, however, pointed out several drawbacks, particularly around and limitations. The base model started at $899, which was seen as high compared to competitors like the 12.9-inch at $799, especially since the Type Cover keyboard was an additional $129 purchase. The Verge, scoring it 8.1 out of 10, described the device as "refined but not revolutionary," critiquing the non-upgradable soldered configurations (4GB to 16GB options) that limited future-proofing. echoed concerns about the extra cost of accessories, rating it 4.5 out of 5 but noting that the overall package could exceed $1,000 for a practical setup. Reflecting strong consensus on its versatility despite the caveats. In retrospective views from the , the Surface Pro 4 has been valued for its longevity in education and settings, with CIO praising its fit due to robust features and professional-grade performance as early as 2016. in affirmed it remained a top-notch tablet years later for its and support. By 2025 standards, however, it is considered outdated, lacking modern ports like and struggling with newer software demands, though some users still appreciate its durability in specialized roles.

Sales and legacy

The Surface Pro 4 played a pivotal role in the commercial growth of Microsoft's Surface lineup, contributing to strong initial sales following its October 2015 launch. In the fourth calendar quarter of 2015, Microsoft sold approximately 1.6 million Surface devices, with the Pro 4 accounting for a significant portion as the newest model. The broader Surface line achieved over $1 billion in revenue during fiscal year 2016, contributing to the ongoing profitability of the category, with quarterly growth including a 61% increase in the third quarter attributed to the Pro 4 and Surface Book. The device's success helped elevate Microsoft's position in the tablet and 2-in-1 PC , where Surface shipments reached 1.1 million units in the first quarter of 2016 alone, capturing a 22% unit in the detachable PC segment. This performance boosted Windows in the , up from prior years, as the Pro 4's premium features like its high-resolution display and full Windows compatibility appealed to professionals. As a cornerstone of 's hardware strategy, the Surface Pro 4 signified a strategic pivot toward premium 2-in-1 devices, setting the template for evolutions in the Surface Pro line from the 2017 model through the 11th edition in 2024, with refinements in processing power, displays, and integration with Windows features. Even in 2025, it continues to serve in environments for applications requiring x86 , though it has been overshadowed by ARM-powered successors like the Surface Pro 11 with Snapdragon X chips. ended driver and support for the Surface Pro 4 on November 13, 2021, following a lifecycle policy for pre-2021 devices, yet its aids repairability and sustains resale values around $200 for functional units.

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