Originally Posted by brandonwh64
May have the full amount of memory just with a custom bios to limit it? Seems kinda odd that they would build a random reference card with those specs and it be the ONLY card unless it was some kind of test card.
This is an OEM GTX 660, there aren't a lot of them out there, but it isn't a one of a kind card. You can/could only get them in Pre-Built PCs. It was released before GK106 was ready, the OEMs wanted a cheaper GTX600 series card, so nVidia made this card with GK104 to appease them. It is kind of stupid that they called it GTX660 and then release a GTX660 in the retail channel based on GK104, but whatever.
I doubt the full memory amount is on the PCB. Though it should be pretty simple to find out, assuming this is a basically reference PCB. The extra 512MB of memory pickybacks on the same memory bus as some of the other RAM(that is how the GTX660Ti gets 2GB with a 192-bit bus). So those extra two memory chips are put on the back side of the PCB. If there are two memory chips on the back of the PCB, the extra 512MB is there, if they isn't any memory on the back of the PCB, then the card only has 1.5GB.