I need to replace my 128mb NVidia GeForce FX 5200 graphics card (PCI interface) because I'm starting to get problems with screen flashing & blue screen NV4_disp. I tried updating driver & it was worse. I have a Dell Dimension 4600 Series, Intel Pentium 4 processor at 3.0MHz With HT technology and have 2.5GB RAM. I'm not really into gaming & have limited funds. What cards(s) do you recommend ?