It's not the motherboard the GPU needs to compatible with, since most GPU's run on PCI-E x16 lanes, which pretty much all motherboards have.
What you need to be aware of is that wattage and specs of your Power Supply (PSU) because most GPU's need extra power which is drawn from the PSU through PCI-E power slots, now if the PSU doesn't have those, then you are severely limited in what you can buy without upgrading the PSU as well.
Now then, for that budget, you won't be getting anything high quality, without knowing the specs of your PSU then I can only recommend something that doesn't need help from it. It would also be nice to know what kind of games you'd like to play with it. (If it's gaming you want it for that is).
For RS. 8064 you could buy a Radeon HD 7750 which is quite capable, just don't expect BF3 or whatever on max settings.
For RS. 2000/3000 you could buy a Radeon HD 4350, which is on the lower end of the market but is rather cheap and can play quite a lot games, but not on max settings or on very high resolutions.