Hello,
I wanted to inform you that I was unable to make
GIGABYTE GTX 560TI 1GB work with
GiGABYTE GTX 660Ti 2GB.
I have tried switching cards around in slots.
I installed (among others) nVidia official drivers 320.18, restarted, ran Install.cmd, restarted, went to nVidia control panel, SLI was recognized and after switching to Best Performance the result was:
a) 660Ti in first slot - 800x600, Windows 7 64-bit Ultimate doesn't recognize cards at all
b) 560Ti in first slot BSOD.
I did not use driver sweeper. I did use nVidia Clean Install every time.