I helped an old gentleman move from his home to a retirement home and he told me I could keep a desktop computer that he had because he would no longer need it the computer turned out to be a dell inspiron 530s with the G33M02 motherboard and a 250GB hard drive made by seagate dual core processor and about 1gb ram I decided I would upgrade this computer since he took very good care of it and it is flawless I wanted to go ahead and replace the hard drive with 2 Seagate constellation 1Tb hard drives also planned to yank the ram and replace it with 4 sticks of 1gb ram made by samsung which is the brand it currently has in it the har drives should work and the ram should as well I'm aware this system supports 4gb of ram on 64 bit OS and that the G33M03 would support 8 I also seen that a lot of people claim I can pretty much go with any graphics card the limiting factor would be the 250W power supply I am going to replace that supply with a 420W I found on newegg so my question is do you see any issues with the parts I plan to acquire and how far can I go with the graphics card ? What is the best graphics card this system can successfully and correctly make use of ?