My laptop is one or the later Core 2 Duos, which makes it about 3 generations behind. I switched to using an OCZ Agility 3 that I got cheap, and the computer is great now. Actually, I notice a huge difference (good) from my computer and clients i5s with mechanical HDs. It's sad.
(in case you were wondering, Sata 2 port on this laptop)
You won't really see much improvement in game but you do in everyday use and application loading.