I'm thinking of bying 1 or more flash drives or an SD card to use with the readyboost function on by 64bit Windows 7 machine. I have a few questions regarding it before i put my hand in my pocket and buy anything. If i go ahead I would be using the fastest available flash/SD. I have 6GB of RAM current installed so will readyboost make any difference to boot / program load times? Will 2 x 2GB flash drives be quicker than 1 x 4GB or is the limitation on the motherboard? Would an SD card better than USB flash drive? thanks