Thanks for reply
aFX1800cardwas broken!!!!
SoI opted toinstall twofx3800withSLIcable andis already fedonZ800.
Inthe systemyou can see thecards andhavethe latest drivers,but thenin theNvidiapanelI havewrittenon bothsche"SLIdisabled"andI do not findhow to activate them?
Attaching Nvidiacontrol panel screens
