Graphics Card to buy for Best performance

[XPower]

I am using the following system: Manufacturer:OEGStone
SYStem Model: D845 GRG
Processor: Intel Pentium(R)4 CPU 2.66
Memory: 1GB
Purpose of usage : Gaming
options:
i have are Nvidia 6800 or Radeon 3850, 4650. someone told me my mainboar supports upto 4x i don't know any details in short require your help. if there is a better option suggest it to me ..... Thank you

 

[mindless728]

your best option is to not try and keep that computer gaming, it simply doesn't have the speed (cpu too slow and too little ram)

just save the money from the new GPU towards a new computer