Microsoft is serious about optimization this time
Microsoft is serious about optimization this time—Windows 11 is "40% faster" on 8GB PCs. In an official blog post, Microsoft singled out Windows 11's 8GB memory optimization for a dedicated discussion. On 8GB PCs, system responsiveness is up to 20% faster, multitasking scenarios are up to 40% faster, and an additional 2GB of active data can be kept in memory. The corresponding version is Windows 11 26H2.
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Microsoft Is Serious About Optimization This Time: Windows 11 Is "Up to 40% Faster" on 8GB PCs
In an official blog post, Microsoft dedicated a whole section to Windows 11's 8GB memory optimization. On 8GB PCs, system responsiveness is up to 20% faster, multitasking scenarios are up to 40% faster, and up to 2GB more active data can stay in memory. The corresponding version is Windows 11 26H2, build 26300.9818 and above.
The Real-World Test Scenario Behind the 40% Multitasking Speedup
Microsoft's lab scenario is very specific. On the same 8GB PC, open 20 Edge tabs, a 4K video, several large Word, PowerPoint, and Excel files, Outlook, and File Explorer in sequence, keeping everything open the whole time — this workflow is 40% faster than the January 2026 version.
The numbers announced this round are summarized below.
| Item | Change |
|---|---|
| Start menu, search, context menu, Settings, Snipping Tool, File Explorer responsiveness | Up to 20% faster |
| Multitasking workflow (20 tabs + 4K video + large Office files) | Up to 40% faster |
| Active data kept in memory | Up to 2GB more |
| System + Edge + Microsoft 365 committed memory growth | Up to 900MB less |
| Of which Office apps | 360MB less |
| Widgets footprint (on 8GB and below machines) | About 200MB less |
| Edge launch (when already running in background) | Up to 33% faster |
| Edge idle tab sleep time | 15 minutes by default, previously 2 hours |
Keeping 2GB Off the Disk Is the Most Tangible Win This Round
Memory compression parameters have been retuned — how much to compress, when to move data to the slow disk, and when to fetch it back have all been recalculated based on the actual conditions of 8GB machines. The result is that up to 2GB of active data stays in memory, so the hard drive drawer doesn't have to be opened nearly as often. When switching back to an app or tab you had open an hour ago, reloads are noticeably fewer.
System and Apps Together Save 900MB
The 900MB reduction in committed memory comes from Windows, Edge, and Microsoft 365 working together, with Word, PowerPoint, Excel, and Outlook contributing 360MB. Widgets on 8GB and below machines now load only when opened, using about 200MB less when closed. Teams enables efficiency mode by default on 8GB machines, launches up to 20% faster, and automatically lowers camera resolution during meetings to leave processor capacity for audio. WhatsApp for Windows also got a double-digit percentage memory improvement.
Edge Launches 33% Faster, and Local Testing Confirms It
The mechanism isn't complicated. When you click Edge from the Start menu, Edge is often already running in the background, and Windows connects directly to that process, skipping the search-then-launch process.
This machine runs Windows 11 26H2 build 26300.9818 plus Edge 156, which exactly meets the prerequisites Microsoft specifies for this speedup. Testing the same set of scenarios: after fully exiting Edge, 8 cold starts had a median of 360 ms and a fastest of 329 ms; with Edge already in the background, opening a new window 8 times had a median of 113 ms and a fastest of 13 ms — roughly 3x faster. This speedup depends on the system version and whether Edge is already running in the background, and is unrelated to memory capacity.
| Launch Method | Median | Fastest | Slowest |
|---|---|---|---|
| Cold start (after fully exiting) | 360 ms | 329 ms | 445 ms |
| Warm start (already running in background) | 113 ms | 13 ms | 133 ms |
How to Get This Version
The version requirement is Windows 11 26H2 build 26300.9818 or higher. In Settings, turn on "Get the latest updates as soon as they're available" under Windows Update, then click Check for updates. Keep Edge, Microsoft 365, and Teams up to date as well — some improvements arrive with app updates or via the Microsoft Store.
What Other Optimizations Are Coming?
Several more things are in the pipeline. WinUI 3 apps like File Explorer, Notepad, Paint, and the new Windows Search are being rebuilt to "open faster and use less memory"; Search and Widgets will share one web engine, while OneDrive and Photos share another; Microsoft is also working with PC manufacturers and chip partners to shrink hardware-reserved memory, freeing up more space for the system and apps. On the hardware side, third-party commissioned testing shows that the 2026 8GB Dell XPS 13 has up to 94% faster multi-core performance than the 2021 8GB model, with overall performance approaching the 2021 16GB configuration.
What 8GB machines get this time is a whole set of detail optimizations that use memory more frugally, advancing on four fronts at once: system responsiveness, multitasking, browser launch, and app memory. It looks like Microsoft is genuinely serious about Windows 11 performance optimization this time — all real, tangible performance improvements. Compared to the feature pile-ups of previous years, this is what users actually need.
Written by our editorial team; tools listed here are tested or verified against public sources. Links point to official sites or GitHub repos for reference only — no paid placements.