But the PCI protocol IS getting obsolete. So finding a next gen motherboard that still has 3 Scope-friendly PCI slots is getting tricky.
Some 3 weeks ago during a Texas lightening storm we were hit with a power surge that wiped out my computer. Motherboard and power supply fried. So it seemed to be a good time to make the leap to an i7 board, especially as the Intel i7-975 Extreme Edition Bloomfield was being released on June 3rd, just a few days away.
Trouble is, there are precious few i7 motherboards that have 3 PCI slots. There's the Gigabyte EX58-UD4 and the ASRock X58 boards. I'm guessing the Gigabyte EX58-UD4 is a better choice than the ASRock, but it's not available in the US as far as I could tell. So I went with the ASRock X58 Supercomputer board from Newegg:

http://www.newegg.com/Product/Product.a ... 6813157150
Bottom line, it can be made to work. Mine is working now with my 3 Scope cards and Scope v5.0, and all are working just fine. But there were some serious problems getting there you should know about if you are thinking about going down the same path.
There are two main issues. The first is in common with the Gigabyte board, that the video PCIe card is right next to the PCI slot, so there is no room for a double wide video card. Even a single wide air cooled card is going to run really hot jammed up so close to the full sized Scope card. And I don't want to even think about the stress the adjacent Scope card will suffer.
So water cooling is probably essential unless you are using a very low power video card. I admit to playing computer games and MMORPGs from time to time, so I want to keep my high performance graphics card. Trouble is, the video card slot is so close to the 3rd Scope card slot, the GPU water block I had been using wouldn't fit because the water fittings took too much space. So I had to buy a new GPU water block card. Danger Den has GPU blocks for most of the performance graphics cards, that has the fittings on top of the card, and the hose nipple pointed backward. It just barely fits, but it does fit.

Second issue is that the support cooling is badly implemented. Notice how small the southbridge cooling setup (right around the CPU) is, and the northbridge chip not only has a minimal heat sink, the top is covered by that stupid X58 label. The end result is that the board burns out very easily. Especially when there are 3 long Scope cards obstructing air flow.
As I write this, I am on my 3rd ASRock motherboard. The first fried after only 4 hours burn in with Primes95. CPU was cool enough, about 59 degrees C., as it was water cooled. But the northbridge and southbridge chips were too hot to touch. I didn't cotton to this at first, as I had read reviews that a large percentage of the boards arrived DOA or died shortly after install, but didn't mention why. So when the 2nd board arrived, I put it together the same way, and it lasted about 8 hours before self immolating. So on the third board, I ordered some aftermarket cooling:

http://www.frozencpu.com/products/6717/ ... g40c16s230

http://www.frozencpu.com/products/4110/ ... 36c121s262
This seems to work. It is a little noisy, especially the little 40 mm fan on the X58 heatsink that whines like a turbine. But it's only marginally more so than before, and it's tolerable. I also have a fan mounted in the computer case right above and pointing down on the 3 Scope cards, to keep them happy.
Bottom line, the best solution probably is to get an XITE-1. But if you have 3 Scope cards already and you want to keep them even as you upgrade your computer to the latest and greatest, it can be done.