****hi svdl - I found those here and would be nice an opinion which is best choice.
**thanks...using Win XP Pro 64 bits of course.
**

 Gainward GeForce 8800GT 1GB GDDR3, PCI-Express 2.0, 2xDVI/HDCP, 256bit
600 MHz Clock speed
OpenGL 2.0, DirectX 9.0c, DirectX 10
PCI Express 2.0 x16
DDR3 SDRAM 256-bit
clock frequency for memory 1.8 GHz
Nvidia SLI Multi-GPU Technology, Extreme HD ready (XHD), Nvidia Quantum Effects Technology

XFX GeForce 8800GT 670M 512MB XXX GDDR3, PCI-Express 2.0, 2xDVI/HDCP, 670/1950Mhz
670 MHz  Clock speed
OpenGL 2.0, DirectX 10
PCI Express x16
DDR3 SDRAM 256-bit
clock frequency for memory   1.95 GHz
Nvidia SLI Multi-GPU Technology

     

"'you shut up!  or I'll bring democracy to your country! "
Cris Galvão aka Softcris  - www.crisgalvao.com
(or softcris, SoftCris)
Rendering since 1997 and
at Renderosity since 1999.
OS Win 8.1     64 bit