Not sure, placebo effect, maybe. But since there're an unused SD slot and an unused SDHC card, I say why not?
At least it's really running according to the Performance Monitor.
But I would venture to say, as long as you have >2GB of RAM, in most cases the difference is probably minimal. The most noticeable improvement is likely "on system responsiveness following heavy paging, where reactivating an application via Restore was up to eight times faster.
" (Source: http://www.roylongbottom.org.uk/readyboost.htm
Anyway, I've given it up (again) because of its not working reliably - It still gives up occasionally after waking up from standby.
Although I suspect that it has more to do with the SD slot of the notorious Ricoh controller instead of ReadyBoost itself. I could test with a USB memory stick but, even if it works that way I wouldn't be leaving one connected to my box all the time.
Cheers.Edit: Okay, I'm giving it another go again. This time I've changed the PCI power saving in Power Manager from maximum to moderate and, there's something changed - The SD slot remains usable after some sleep and wake-up attempts, but now it loses the ReadyBoost cache. That's, the file is still there but the system doesn't recognize it.
It used to stick Disk Management, that's, if I open diskmgmt.msc when the problem occurs, the SD slot's light will be stuck, and Disk Management in loading disk and partition information.
Was formatted under NTFS, now trying exFAT and see if there's any difference.
BTW, I have a theory, that the "forgetting" problem is something related to standby and wake-up attempts while running on battery.
It may also has connections to the driver, cause there are reports that the Ricoh controller has problems under some scenarios under Linux as well, but I couldn't find any newer Windows driver for it.Edit2: Changing the PCI power saving mode seems to be the key.