As Vrumor stated, we can't really help you if you can't bother explaining the issue. What exactly is suffering from slowdowns? What are the games/programs that are affected, on which settings? What OS are you running? Does it happen continuously or at certain times?
Windows 7 - 64BIT , As soon as it boots to desktop and for games its like any settings lowest to maxed.. I think on lowest i get 1 extra frame .
Happens all the time, I think ima just buy a new pc