seeingeyegod :
this is the first time I've ever heard someone saying the GTX660 only has 1.5Gb of "real" RAM. Next people will be saying Nvidia cards actually have no RAM, and run purely on the AMD fan boy hate.
Seriously? i have actually owned the cards. I have had many AMD and Nvidia cards in my time, not a fan of either, just get the best thing for the money at the time, whatever brand i don't care. Just speaking from actual experience. The total memory of the card is 2gb, 1.5gb is on a 192 bit bus link, the other 0.5gb is on a 64bit bus link, hence the driver usually chooses not to use this as its slower. This is the same thing as the latest gtx970 saga with its 4gb ram, but 0.5gb of that is on a much slower bus, the driver/firmware avoids using the slower ram.
read, dont just lash out at things you know nothing about.:
http://www.anandtech.com/show/6159/the-geforce-gtx-660-ti-review/2