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#11
Is your drive MLC? Unlike SLC, they are known to exhibit the symptoms you describe. If you suspect the SSD, replace it with a HDD and see if there's any difference. Before you do, though, use Diskpart to see if your current SSD's partition is properly aligned. You can get all the info for that on OCZ forums.
I don't want to discourage you from using the 64 bit OS because your system seems decent enough (except for the relatively small amount of RAM) and should be pretty fast. But, with only 3GB memory, you would get much better performance with the 32 bit OS when running 32 bit apps. Also, your HD is large enough but at only 30GB, the smaller 32 bit OS would be better for longevity.