There is no sense in trying. External storage on RAM base exists for decades - it's called solid-state-disc and besides special server applications, this technology is now obsolete. Modern solid state FlashROM devices (your USB stick) can be seen as sort of RAM based storage, too.
I understood that you wanted to have mass storage that has the speed of RAM (the only meaningful purpose of external RAM), but this will always be limited by the RAM prizes and the needed high speed interface that can compete with memory placed next to the controller. Or you think of a completely different type of computer, where work memory and mass storage would be the same. Since this would only speed up loading times beyond a reasonable amount, there is not much sense in such a concept. Fire up a RAID 0 with some affordable high end harddisks and load the monstergame of your choice - I guess you won't see much need for something ten times faster but 1000 times more pricy, too.

But I've got an idea: Just remove your case and place the mainboard and all the stuff on your desktop. This way, everything becomes external...:mrgreen: (I know some guys who actually run their rigs this way)

there is a feature in vista that will use a usb jump drive as a sort of ram but this is very slow. maybe a better way would to use an esata connection to some flash based memory. just a thought

I understand your curiosity. I wish there was an external RAM. I have a laptop that the RAM is not accessible. I would literally have to take off keyboard and flip over the motherboard. So it would be nice an easy just to plug into the side