Not true. However, apparently many flash drives are not *fast enough* to be used for ReadyBoost, so get a nice fast flash drive. I notice that newegg now lists ReadyBoost-ready or somesuch in the flash drive specs.
Good article at Anandtech. I'm going to reseach flash drives now. I was under the impression that modern flash drives had only one specification (besides storage volume, of course) - USB 2.0 compatible. All the same. Not so? What goes into making a "nice, fast flash drive"?
... What goes into making a "nice, fast flash drive"?
Flash varies dramatically in its read/write rates. For example, SD cards come as e.g. "50x," "80x," "150x" etc. Unfortunately, I haven't seen similar ratings (or more appropriately, actual read/write rates) widely advertised for flash drives. I did read that at the time a flash drive is first plugged in, Vista makes a determination of whether or not the drive is fast enough to be used for ReadyBoost; I'm not sure if it does a quick benchmark, or if the info is available through the USB self-description process.
I was getting my USB keychain drives and other flash memory mixed up. Yeah, I have a Canon camera with a smokin' fast CF card. I think I'll plug that onto the ol' homebuilt system and see how it works.
From several articles that I have read regarding readyboost, if you currently have 2Gig of ram installed in your system, the advantage of readyboost in barely negligible.
Recently, I had a ram module go bad and had to rma it. In the meantime, I utilized Vista's readyboost feature and it did help especially when running ram intensive applications. It can be a useful tool, but only under the right circumstances. I would not count on it as a method of increasing ram performance (just for the sake of it) with Vista.
Readyboost was primarily designed for the laptop user, to ease the workload when working with ram intensive applications. I don't think you will see much benefit in a desktop system.
There are 2 basic types of memory being used on flash drives, MLC (slower and cheaper, higher densities available) and SLC (MUCH faster, costs more, and not available in same densities as MLC). The memory speed and the quality of the controller are the factors that determine Ready Boost compatibility.