I have a Dell XPS 9000. Just wonder whether the hd 4870 1g toxic is suitable for the system? Or what other card should i get for this spec? Or Should i change the PSU? I play games like GTA, NFS, far cry2 etc...
Intel Core i7-920 processor 2.66GHz
Windows Vista Home Premium 32 bit
3GB (3X1GB) DDR3
23 inch LCD
PSU 475 watts
Dell PSUs are tough, reliable and underrated. They give plenty of power where it's needed-the +12v rail, and the website clearly shows the GTX260 as an option, a very similar card in terms of performance and power consumption to the HD4870.
You will be fine.