Microsoft says Windows 11 now runs up to 40% faster on 8 GB PCs

RAM is your PC's short-term memory. It holds the apps and files you are using right now, so they open fast. When RAM fills up, Windows moves some of it to the drive, which is much slower.

Many everyday PCs ship with 8 GB. Newer Copilot+ PCs, Microsoft's line of AI-ready laptops, need at least 16 GB. With AI data centers soaking up memory, RAM prices keep climbing, so lots of people will stay on 8 GB longer than they hoped.

Microsoft says it is working on three things. It wants Windows to make better use of the memory it has, protect the actions that must feel instant, and make key apps need less memory. Executive Vice President Pavan Davuluri wrote the update. The company says memory work has been a quality focus since July.

Here are the headline claims, all from Microsoft's own lab:

• Up to 20% more responsive on 8 GB PCs.
• Up to 40% faster multitasking in one demanding test. It opened 20 Edge tabs, a 4K video, large Word, PowerPoint and Excel files, Outlook and File Explorer one after another. Microsoft compares this with the January 2026 builds.
• Up to 2 GB more active data kept in memory instead of moved to slower storage, so an app or tab you left open is less likely to reload.

Open Task Manager on an 8 GB PC and you may see most of the memory in use. Microsoft says that does not mean your PC is struggling.

It uses a desk and a drawer. The desk is RAM, and everything you are working on sits there within reach. The drawer is your drive, and fetching from it is slower. "A full desk is a good thing," Davuluri wrote, because it means what you use is right there. Windows fills spare memory with useful apps and data, then gives it back when you need it.

His test is simple: "The real test is whether your PC stays responsive, not how much memory remains unused."

A test on virtual machines, which are pretend PCs that run inside a real one, points the same way. The same Windows 11 version was started with 4, 8 and 16 GB of RAM. The more memory Windows got, the more it used.

The 16 GB machine used about 1.3 GB more than the 4 GB one right after a restart. On the 8 GB machine, 2.9 GB was in use and 5.1 GB was available.

Windows has squeezed data for years. It folds less-active data into a smaller form so it can stay on the desk instead of going to the drawer.

Microsoft says it retuned this for 8 GB PCs: how much to compress, when to use the drive, and when to bring something back. That is where the "up to 2 GB more" claim comes from.

Microsoft lists the actions people repeat all day: opening Start, searching, right-clicking, opening Settings, launching Snipping Tool and opening File Explorer. Compared with the January 2026 update, it says they respond up to 20% faster.

How? Windows briefly puts your request first and backs off background jobs, such as search indexing, while you are active. That matters most in the first minutes after a restart from an update, when Windows still has setup work to finish.

Other small tricks add up:

• Edge: when the browser is already running in the background, Windows connects to it directly instead of looking for it first. Microsoft says Edge can open up to 33% faster.
• Teams: it can turn on Efficiency Mode by default on 8 GB PCs, a setting that makes an app use fewer resources. Microsoft says it helps Teams launch up to 20% faster.
• Video calls: Teams can lower camera resolution during meetings to save processor power for audio.

Microsoft says Windows, Edge and Microsoft 365 apps together cut committed-memory growth by up to 900 MB in its multitasking tests. Committed memory is the amount Windows has promised to apps.

• Microsoft 365 apps: Word, PowerPoint, Excel and Outlook add up to 360 MB in savings, partly from organizing memory more efficiently.
• Widgets: on PCs with 8 GB or less, Widgets now loads only when you open it. That saves roughly 200 MB while it is closed.
• Edge tabs: inactive tabs now go to sleep after 15 minutes by default, down from 2 hours.
• Other developers: the improvements are open to third-party apps. Microsoft says WhatsApp is seeing a double-digit memory improvement in its Windows app.

In real life Your browser has 20 tabs open and you walk away for lunch. After 15 minutes, the tabs you are not reading go to sleep and hand their memory back. When you click one, it wakes up.

The company says it tests fixes across more than 20,000 PCs in its labs, including current 8 GB models. It uses automated workloads based on browsing, Microsoft 365 work, video calls and background downloads. It also uses high-speed cameras to time how long a click takes to show a result on screen.

It says it checks real-world data after release to see if the gains hold. It also points people to Feedback Hub, where reports and upvotes help decide what to fix first.

Keep the fine print in mind. These are lab numbers, labeled "up to," and compared with Microsoft's own January 2026 builds. They show a direction, not a promise for your laptop.

Microsoft says yes. In testing it commissioned from a third party, a 2026 Dell XPS 13 with 8 GB delivered up to 94% faster multi-core processor performance than a 2021 model with 8 GB.

The same 2026 PC performed about as well as a 2021 model with 16 GB across processor performance, web browsing, AI web tasks such as background blur and face detection, and 4K video export. Microsoft's conclusion: the complete PC, not memory capacity alone, shapes the experience. It still says heavier work, such as 3D modeling or advanced video editing, benefits from 16 GB or more.

Memory prices are one reason the topic is hot. Microsoft's own numbers add context: it reported a 22% drop in Windows OEM and devices revenue in its fiscal first quarter of 2027, while adjusted earnings reached $36.4 billion, up 18%. OEM revenue is what PC makers pay Microsoft for Windows on new machines. When PCs cost more, fewer people buy new ones.

Microsoft does not link the update to those numbers. But making the PCs people already own feel quicker is a sensible move when the next upgrade costs more than it did last year.

The improvements are in Windows 11 26H2, build 26300.9818 or later. Some arrive through app updates or the Microsoft Store, so keep Microsoft's own apps updated. Check Settings, then Windows Update, to see which build you have.

• If you own an 8 GB PC: install the latest Windows 11 update and update your Microsoft apps. You may notice faster restarts, less reloading of tabs and quicker Start and File Explorer.
• If Task Manager looks scary: stop worrying about a high percentage by itself. Watch how the PC behaves instead.
• If you plan to upgrade: 8 GB is fine for everyday work, but video editing, 3D work and Copilot+ features want 16 GB or more.
• If you use Edge: tabs now sleep after 15 minutes, so a tab you left alone may take a moment to wake up.