http://memory.dataram.com/products-and-services/software/ramdisk

[maks]

Thanks for clearing that, is really neccesary?

if you're using something that hits the disk all the time then it will be much faster. optimally a sata 3 drive has a transfer rate of 6Gb/s vs more like 10Gb/s for 1Ghz DDR3 and the seek speed is faster too even compared to an SSD