Does Windows 10 allow readyboost for micro sd cards? - Quora

I force enabled readyboost through registry tweak on my 4 GB ram laptop, on an 8 GB generic chinese $3 microsd memory card in laptop’s builtin card reader, that wasn’t accepted by windows for readyboost.

TBH, I didn’t expect that it’d make any difference but boy it does make hell of a difference.

  1. Most of the ram used by superfetch is free to other tasks, hence my laptop has gotten snappier.
  2. This laptop on windows 10 had very high disk activity all the time (alright I have some bad browsing habits where no. of tabs go out of control in no time). Once superfetch copied its cache on memory card, hard disk activity went low to none.
  3. I experimented with multiple filesystems and allocation unit sizes, in my opinon, if your readyboost cache is going to be smaller than 4 GB, stick to fat32 with the largest allocation unit size, if you intend to set it past 4 GB, use exFAT with 1–2 MB Allocation unit size for best performance.
  4. Your card / flash drive doesn’t need to qualify for readyboost to enhance performance, two simple registry tweaks can enable it on any flash storage device, and the performance still gets better.

Although I’ve read everywhere about readyboost being a gimmick, at least it saves power by reducing hard drive activity on laptops with traditional hard drives.

Update: Strangely, when I upgraded the readyboost from 4 gig to 8 Gig, hard drive activity came back although the performance boost is still there, guess windows tries to cache the full 8 GB because even at times where harddrive activity is at peak, all applications run and load without any delay. Hard drive usage goes down when laptop’s plugged out (superfetch algorithms at their duty).


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