well seems a lot to change!
I'll have the tech guy to do it - since he'll be more safe than I when changing those things.
I'm printing your posts and showed to him next.
YES  SLOWNESS IS GONE away now..but also no difference in speed from a non-SLI mode. I also have to reboot
Case I change to No-Sli and back too. It does works without rebooting but some  glitches happens so...when rebooted all goes perfect.
That's not a problem. I intend to use Sli all the time.
Yes my RAm is DDR2 OCZ 800Mhz (2Gb each)
Yes, I said the Bios is the last from XFx site.For Nvidia chipset in the board.
Be back here when all changes has done. thanks once more
Cris

"'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