Re: slow system
You are not providing enough information.
What is your computer primarily used for?
When you say it is too slow, exactly what is too slow? Opening apps? Loading games? Running games? Boot time? All of the above?
What are your complete system specs?
HAF 932 Advanced / Corsair AX1200 / Asus Rampage IV Extreme / i7-3930K / H100 Cooling 4x120mm
16GB Corsair DDR3 / GTX 580x2 SLI + GTX 460 PhysX / SSDs Mushkin 240GB, Crucial 256GB, Crucial 512GB