ATI Radeon HD 5770 - bad font smoothing

[nightf4ll]

I have a MSI R5770 graphic card which uses which uses ATI radeon hd 5770 chipset and its full supported on SnowLeo 10.6.8.

I can boot it with graphicsenabler=NO, and everything works (full resolution, 3D).. The only problem is bad font smoothing. When i use my old Nvidia 9400gt i have much better fonts then with the ATI card.

The Nvidia 9400gt works only with graphicsenabler=yes, but full resolution and 3D work fine.

So I m guessing that Nvidia has better hardware and better rendering? Is there any fix for the ATI card? Mybe other kexts or smthing?