what graphics card

the the moment i got ATI graphics

is a GT 730 nvidia 96 cuda cores 2gb better then rendering then my quad core CPU?

also would a gt 730 396 cuda cores 1gb better then the graphics card mention above?

Hi, look to my benchmark thread to compare cards, render the file on your CPU but with small tiles (16x16).
These GT cards are not really suitable for GPU render and 1 GB is way to limited.

http://www.blenderartists.org/forum/showthread.php?359492-The-new-Cycles-GPU-2-73-Benchmark&p=2808475&viewfull=1#post2808475

Cheers, mib