ReadyBoost has nothing to do with paging files. And yes, all pendrives are garbage: I always try to pick the ones with the best user reviews on newegg/amazon yet I've found bad 'sectors' even on those with the most immaculate reviews.
If there was a proper tool to test the drives maybe the quality would improve: I still haven't seen a single pendrive remapping damaged flash areas yet, I wonder if the wear leveling works at all. Anything that keeps writing in the same area like ReadyBoost can easily kill the drives over time.
Readyboost is designed to take over the part that traditional mechanical hard disks don't handle well. Small random paging writes, as you get a lot of these on a system disk it will decrease the life of your flash drive. If you're needing to use readyboost just get some more ram or an SSD, anything over 4GB you shouldn't really need really need readyboost on.
Well obviously one of you is wrong. Which is it, ReadyBoost has nothing to do with paging files, or small random paging writes? Actually, according to wikipedia:
"[Readyboost] caching applies to all disk content, not just the page file or system DLLs"
So yeah, I was wrong, it isn't the page file.
Also, you should try reading posts before responding to them: "get more ram or an SSD" - Why would I get another SSD when I already have one? - " Now I have an SSD, so ReadyBoost is useless for me. "
And who the hell would use ReadyBoost if they could afford extra RAM or an SSD? The whole point of ReadyBoost is a small yet significant performance upgrade you can do with a part that most people have lying around the house. Obviously if you have the disposable income to spend on extra RAM or an SSD, you won't be looking at ReadyBoost.
Are you at your max ram or is the ram upgrade too expensive? Readyboost is no substite for actual ram. If you need to use Readyboost, then buy a flash drive that is meant for it. If your system is at max ram then Readyboost could be of use but i stress the word "could". I've had flash drives last between 4/10 years.
I disagree, ReadyBoost is a perfect substitute for actual RAM when you can't afford actual RAM. Obviously more RAM would be faster than more ReadyBoost, but more RAM can cost several $20's, and more ReadyBoost costs around $5. Except that most people have USB flash drives lying around the house already, but most people don't have extra RAM lying around the house.
But to answer your question, I have 4GB of RAM, and there are very very few situations when I have needed more; Usually when rendering large videos/pictures in video editing studio software or Maya and such. But extra RAM doesn't do a damn thing to a 3D game's framerate performance, nor does it significantly help with day-to-day desktop PC usage.