Optimal graphics drivers for HP Pavilion g7-1070us

I bought an SSD for my laptop and did a clean install of Windows 7 Enterprise on the new drive.  I had a hard time installing graphics drivers.  The drivers on HP's website would seem to install without any errors, but... nothing would change -- I was still seeing the generic VGA drivers.  Finally, I changed the setting in Windows 7 so that it would automatically detect and install drivers and updates.  After that, the computer automatically installed Intel HD graphics drivers.

So... everything works now, but I did notice a drop in the graphics scores under the Windows Experience Index, as compared to what they were under the old hard drive.  The Graphics score dropped from 4.5 to 4.2, and the Gaming Graphics dropped from 5.3 to 5.1.  Unfortunately, I did not make a note of which graphics drivers were installed on the computer under the old drive.

Yeah, those are small decreases, but still... I'd like to squeeze as much performance out of this machine as possible, especially given that I just invested in a new SSD drive.  Any advice on how to proceed?

Thanks.