Yes, you're right. I've noticed that as well in my system when I had the SLI set up for testing. I've got the official drivers and some demo games to test them. Tomb raider 2 works well but another flight sim gives black screens and other issues. 3dMark 99 doesn't work. Switching to alternative drivers fixes the game problem and 3d Mark 99, but I noticed the issue you mentioned. Don't have a straight answer for you but from memory 3D Mark scores appeared normal when SLI enabled. My Voodoo cards are 8MB and 12MB so I'll have to upgrade the 8 MB one to 12 MB and test again. Run some benchmarks perhaps with different drivers and see if there's discrepancies.