Yeah, I somewhat agree on the getting Quad SLi, but not on DX10. The drivers for it will be out at the end of this month, so there should not be anymore problems with that. I have a DX7 card that runs Half Life 2 beatifully. 1280X1024 most settings on medium, one or two on high, and 2AA/AF. Not 100% if it was 4AA, but...Pretty good I think. If you buy a high-end card now, and who can say that Quad-SLi isn't high-end, you will be suited for a long time. DX10 is bringing SM 4.0; hell, you tell me 10 games that even use 3.0! Good DX10 games won't come until near the end of next year, possible very early '08. Now I think he can survive the latest batch of DX10 games extremely well on four GPUs....It isn't going to be DX9 cards getting 5 FPS with DX10 cards getting 80 FPS. It will be close, I think...
Well, I'm just going to ask."Greygore, why did you pick two top of the line cards now, when DX10 is coming?" All in honesty, I am asking this.
Anyways, back to topic. I looked around SB's site. I think the hard way is to move some pins, but this Solution looks slightly dated. Check it out:
Curses! Cannot get URL working..Let me just post a picture:
Have you tried asking Creative, yet? Don't mention the Quads, yet. They might hide behind the excuse that it isn't supported, blah blah blah. Just ask that you are having an IRQ conflict and you need to change the IRQ on your card.
Looking through your BIOS, you want APIC enabled as it expands available IRQ resources.
Go to your BIOS, then PNP/PCI configs. Go down to PCI Slot 1/2 IRQ. Change whichever the slot is in. That should fix it, if what SB gives doesn't.
If that STILL doesn't work, go down to IRQ Resource setup and reserve that IRQ. The GPU should default to another one. You could also disable some COM ports, if you aren't using them... The manual says that a sound card can work off of IRQ 9...
Have you tried the orange PCI slot?
~Ibrahim~