There is allot of settings in the bios with these nvidia boards, more than any other comp that
I have in the house. And a wrong setting can give you trouble, or no boot.

Just enable SLI and forget about it, mine is on all the time. I notice a slight momentary pause
when I first start to move the camera in poser. Then it moves in real time no matter how much
I have in there. Thant's when you'll see a boost, it's not like a 100% or 50% boost. But more
like 20 -30%. But I think that USB link is gonna slow you down. With computers you have to
think along the lines, that your only as fast as your weakest link. And that USB connection
is your weak link. The only things I have on my comp that'll use the SLI is one game and my
3d apps. And with the 3d apps it only kicks in when your moving the camera around, or moving
objects around. But your up to speed from your original post and that's a good thing.

BTW: what heatsink did you put on the CPU? I got a Zalman 9700 and I'll tell ya, ya gotta keep
on top of the dust collecting in the fins. Hope you got a door the swings open on your case.
I'm cleaning mine every month. Think I'm gonna change it out for a Tunic Tower tho.  8-)

8-)