Im trying to speed up my system as cheap and effectively as possible.  I just purchased an ATI Radeon 4550 1G Video DDR2 graphics card and a Thermaltake 430W TR2 ATX model# W0070RUC.  Will this be a good setup for running solidworks, autocad, and revit on my desktop, or have i screwed myself? 

My desktop is a compaq presario model # CQ5300Y...I havent touched anything on it...bone stock with original equipment.

I know there is probably better setups out there...just tell me if what i bought will suffice better than what i have now:)

link to my desktop specs: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01949103&tmp_track_link=ot_faqs/top_issues/en_us/c01949103/loc:4&cc=us&dlc=en&lc=en&product=4107320#N1055