What good graphic card will work on HP ENVY 700-210xt Desktop PC?

[operating system]

what do you recommend

 

[laviniuc]

at best... a radeon 7750, with a 150W power supply and an i7 consuming 70W at load, anything with a pci ex power connector is getting close to the limit...
safe choice would be the gtx640/645 that they have available for it.