
Originally Posted by
chuckskull
3x4GB 1600mhz kits can be had for £60 nowadays which would double your RAM, 6GB is already enough for gaming however. Might be some use for image/video editing, but that all depends on what you're editing. Keep an eye on task manager and judge for yourself if you require it. As it's a straight swap it should have no effect on your overclock, using all 6 slots, (adding another set of matching sticks instead) might affect your overclock, might not, varies board to board.
Replacing your SSD, while it would probably double synthetic benchmarks(assuming latest gen @ 128/256GB), real world performance however would be almost identical, so unless it's the only drive you're using and getting full, probably not worth it.
With the 2nd 660 installed it will already be a pretty high end gaming machine, so you're at the point of diminishing returns investment wise.