Unfortunately the 14.x branch of fglrx is very buggy. Even I have issues with it and I have an ancient video card... (OpenGL threading issues.)
If you don't want to play games, stick to open source drivers (they are better in every way except for gaming performance). If you really need the gaming power, you'll need to use something older than 14.x, which also requires using an older kernel, which probably also requires using an older distro.
CPU: AMD Phenom II X4 810 @ 3120MHz | RAM: Kingmax 2x2GB DDR2 800 @ 833MHz| MoBo: MSI K9A2 CF v1.0 (BIOS: 1.D)| GPU: Asus HD 6850 1024MB (DirectCu) @ 835/1135MHz | Display: L24FHD | PSU: PC Power & Cooling Silencer 750 Quad | OS: MS Windows 3.11 Pro x64