I have 4GB of DDR3 running at about 667MHz with my LGA 1156 CPU. I mainly use my computer for gaming. I sometimes get stuttering problems in games and I'm unsure of the cause. I have a 7200RPM 3.0gb/s hard drive and a 1GB graphics card. These problems seem to come during situations which many textures are loaded. I think either my hard drive or RAM has been causing this problem but I'm unsure which. Should I consider buying more/faster memory or is my hard drive the problem?
If you use your computer for games then more memory will not help with the stuttering problem, nor will a new hard drive (I assume you have SMART turned on) You didn’t say what graphics card you had but a better graphics card would probably curer the stuttering problem.
Have you tried the latest drivers for your graphics card?