For what Gaming ? you kidding me .. are your demands low ? like low res low graphics everything off ,,,,, ??????
That 9500GT will be soo slow you will think its Max Payne coming and putting everything in slow motion... 2fps in todays games.. but as I said if your demands are low, then heck it will still be slow lol, I dont know what your thinking ? The HD graphics on the CPU will be faster by the way. Owned a 8800GT and 9800GT ,,,, same speed very good for FEAR multiplayer or UT2K4 or BF1 .... or COD 1 ...
IMO to solve your dilema, I would simply buy a 9800GT and turn off GPU, unless IM wrong and theres numbers showing the HD on die is faster then a 9800 GT. Just my thoughts.