<< Also, does the speed of the ram matter if I an NOT going to overclock the card? >>
If your not overclocking don't worry about what the RAM is rated at as it won't make any difference to you. Irregardless of whether it is 3.6ns or 4ns it's going to be clocked at the same speed by defaullt, so the overclockability of the RAM is non-issue if you intend to run it at it's stock rated clockspeed.