What is the bottle neck in my system? I just got it over a week ago 
CASE Coolermaster CM 690
PSU Antec Earthwatts 650W
MOBO Gigabyte MA790X-UD4P
CPU AMD Phenom X3 720 BE
RAM G. Skill 4GB DDR2 800
XFX radeon HD 4890 1GB
HDD WD Caviar Black 640GB 32MB cache
OPTICAL Samsung SH-S223F 22X DVD Burner
I installed windows xp 32bit on it, then upgraded it to windows vista 32bit black edition by benjamin
CASE Coolermaster CM 690
PSU Antec Earthwatts 650W
MOBO Gigabyte MA790X-UD4P
CPU AMD Phenom X3 720 BE
RAM G. Skill 4GB DDR2 800
XFX radeon HD 4890 1GB
HDD WD Caviar Black 640GB 32MB cache
OPTICAL Samsung SH-S223F 22X DVD Burner
I installed windows xp 32bit on it, then upgraded it to windows vista 32bit black edition by benjamin