Ah, good 'ole Ramdisk...
Ooooo. I was bebopping around on the internet and I came upon this little gem of a pci card:

Its a ram-disk pci card. It has 4 ddr ram slots that can except a total of 4GB of memory. It then treats this memory as a SATA drive. Obviously, using SATA avoids any compatibility problems from using a proprietary method.
If there are any 'ole Mac OS 9, otherwise known as Classic, users reading this ya'll know what a RAM disk is very well. When I ran OS 9 I used ramdisks quite a bit. I used 'em to keep my browser cache on and as my Photoshop scratch disk. They offered quite a bit of performance over my hard drive.
I'm pretty sure Gigabyte, the card's maker, is the one who also announced a dual-GPU Nvidia based video card not long ago. Brings back such fond memories of my Voodoo 5500.
Good days...

dual GPU Nvidia? gee-awd, as if their GT line wasn't expensive enough already....
(doesn't make me want one any less, though...)