See the dates? 18th March I got Vista to run sweetly - but was told by "ASUS" (the motherboard manufacturer) that the SECOND motherboard was also faulty and required replacement in order to make the dual graphics cards work. They would rush one to me.
It arrived this morning - plugged it into the machine. Poof. The whole @#$%ing thing failed.
Another lengthy call to ASUS technical support and the best the guru can come up with is, "If you send that board back to me, I will send you a new one from our factory when I receive it"
This was NOT met by a pleasant response from me - HOWEVER, one thing he did mention was the KB929777 patch - which would allow Vista to recognise the extra RAM.
I swapped the edition 3 motherboard out, and the edition 2 back in, booted up just fine - downloaded the KB patch.
I now have 8GB RAM running perfectly well. Just have to figure this dual video card now.