Yes, 512 MB RAM phones will be supported by Windows 10’s first preview
 

Some 512 MB models, at least, with rumors quad-core power will be needed to drive the OS sans a glitch. The desktop-customized iteration of Windows 10 is coming together rather nicely, from what we’ve been able to see in recent Technical Preview builds, clearly having the potential to make amends for its sub-par prequel. Meanwhile,...

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