What was actually reported
Windows Latest's writer installed 26H2 on a three-year-old 16GB laptop and saw RAM usage fall by as much as 2GB. TechPowerUp's summary of the test says the laptop usually idled around 10GB, and now sits at 7GB, with 4GB of that cached and 8.8GB available. Taken at face value, that is roughly a 3GB gap in idle readings.
The workload result is the part that grabbed attention. With Edge, WhatsApp, Teams, Outlook and a 4K 60fps YouTube video running together, memory use stayed below 90%, where that kind of load would usually push the laptop to 95%. Keep the framing honest, though. 87% is still a heavily used machine, and nothing shows the earlier 95% readings came from identical test conditions.
Other people have posted similar numbers:
- A Reddit user reported about 2GB less RAM at boot on a 48GB PC.
- An X user said a 32GB PC fell from 9.1GB on 25H2 to 7.5GB on 26H2.
- An 8GB PC owner saw no change and was still at 96%.
- TweakTown puts the typical reports at about 1.5 to 3GB less RAM, with results varying widely by hardware and software.
Not a confirmed Microsoft optimization
Microsoft's release-health page confirms that 26H2 reached general availability on September 29, 2026. The material reviewed does not list a RAM reduction as an official 26H2 feature. MakeUseOf notes that Microsoft didn't promise RAM gains with the update and that the reports are purely user-based. Notebookcheck adds that nothing confirms 26H2 itself is responsible, and that startup apps, cached data, app versions and browser tab management can all change the figures.
Windows Latest's own author says as much. The same report credits the Low Latency Profile with speeding up the Start menu, Search and app launches. That feature is about responsiveness, not memory. It also notes that 26H2 is a small enablement package sitting on the same servicing branch as 24H2 and 25H2. So earlier monthly updates may have already delivered some of the work. The honest read is "something changed on some machines," not "Microsoft shipped a RAM diet."
Why 16GB machines are the interesting case
The gain is most useful where RAM is tight. On a 32GB or 64GB PC, 2GB is a rounding error. On a 16GB laptop, especially one with soldered memory, it can be the gap between comfortable multitasking and constant paging. Windows Latest's author says that machine used to sit between 90% and 95%.
The 8GB result is a caution. Windows Report says Microsoft's promise to optimize Windows 11 for 8GB PCs doesn't appear to hold up in early reports. The PCs that most need relief may not be getting it yet.
How to check your own PC
Don't trust a single number. A fair before-and-after comparison looks like this:
- Restart the PC and wait a few minutes for startup apps to settle.
- Open Task Manager and go to the Performance tab, then Memory.
- Note the in-use, cached and available figures, not just the percentage.
- Compare under the same conditions: the same startup apps, the same browser tabs and the same apps open.
- Judge by responsiveness as well. A lower number that doesn't change how the PC feels is not a win.
A high RAM figure isn't necessarily waste, because Windows caches apps and services in memory so they are ready when needed. Available memory and how the system behaves under load tell you more than the headline percentage.
The memory-market backdrop
NoobFeed ties the story to RAM pricing and AI power demand. The supporting data is real, but the cooling-market framing needs care.
- TrendForce's September 30 forecast says conventional DRAM contract prices should rise 10–15% quarter on quarter in 4Q26, and NAND Flash contract prices 15–20%. It says price growth is expected to moderate, but the market stays undersupplied because suppliers prioritize server capacity.
- On PCs specifically, TrendForce says PC OEMs continue to buy aggressively because they expect DRAM supply to stay tight in 2027.
- The NoobFeed figure of DDR4 growth slowing from about 14% in July to about 4% in September lines up loosely with other data. The Seoul Economic Daily reported DDR4 8Gb contract prices up 14.3% in July, to $24. TrendForce's contract page lists a 4.17% rise for August. That is a slowdown in growth, not a price decline, and the months and categories don't match exactly what NoobFeed stated.
On power, Yahoo Finance's report on Morgan Stanley's September 21 note says the bank projects a 33 GW US data-center power shortfall through 2028, against 97 GW of incremental power needed. The same report says the cumulative midpoint shortfall rises from 5 GW in 2026 to 12 GW in 2027 and 33 GW in 2028, which matches the sequence NoobFeed cited. These are model estimates, not utility-approved load figures. They describe a constraint on AI buildouts, not a timetable for cheaper RAM.
Analysis: what to take from it
- Optimism is reasonable, certainty is not. Several independent users and one hands-on test point the same way, but all are anecdotal.
- Don't plan purchases around it. Memory contract prices are still forecast to rise in 4Q26. Skipping a needed upgrade because of unconfirmed savings is a gamble, and so is waiting for prices to fall.
- Third-party apps still matter. Windows Latest points to Electron apps such as Discord and WhatsApp as heavy hitters. A leaner OS can't fully offset them.
- Microsoft's silence is the open question. If the work is real, an official explanation of what changed in the memory manager would help admins and enthusiasts know what to expect.
For now, if you run 16GB, a 26H2 upgrade may well feel lighter. Measure it yourself, and treat the 2–3GB figure as a best case rather than a promise.