agree. You arent using that ram at full speed unless you overclock, or wait for intel's bearlake chipset (x38 is premium chipset name, we now know). Due out Q3 2007, says the remarkably accurate as of late intel roadmap.
You definately want an nVidia 680i SLI chipset, you definately dont want an nVidia 650i (not enough lanes for full speed SLI)
The 680i SLI will support a future core quad processor.
with the 680i SLI there are ten or eleven board partners:
Five of them dont produce the board, they are taking a 680i nVidia reference board and branding it. All the reference boards are made by the same contract manufacturer and all are truly identical, save for maybe some bundled accesories. The reference board (I dont personally like it much) is available from eVGA, BFG, XFX, ECS and supposedly Biostar, altho it's not up on their website as of early this week. There is also a Foxconn board that appears to be a reference board, at least to me.
The reference board isnt bad, it just lacks a feature or two that I personally want. It is going to tend to have the most mature drivers, as it has been out the longest. Surely any bug with this one nVidia jumps on with a quickness, as it affects five or six board partners.
There are also five manufacturers implementing the 680i core logic around their own designs, really four to me because one is using the 680i LT, a lesser northbridge than the 680i SLI northbridge.
You can get these boards from Gigabyte, MSI, Asus, Abit, and DFI (680i LT). Gigabyte claims to be shipping, as does MSI, but actually buying one is quite the trick at this time. An Asus can be had in the striker and the P5N32-E SLI, the only differences between the two being, as I understand it, some onboard power and reset switches, and a post code indicator (and something like a hundred bucks difference, in price). The striker is pointed at gaming enthusiasts, and the P5N32-E SLI at workstation customers, so it's easy to see why they are priced as they are. Dont be fooled, a P5N32-E SLI is every bit as much mainboard for menos dinero.
Im not very familiar with the Abit Board...
Gigabyte's offering is arguably the most feature rich, with I believe ten SATA ports (in other words, an additional controller chip) and quad gigabit ethernet.
MSI's board is equally cool in that it has X-Fi (24 bit hi definition) audio onboard with a creative labs controller chip, a mainboard first. Also worth noting are four PCIe x16 connectors that can run in 16x 16x 8x (off) mode, or 16x 8x 8x 8x mode, depending on which slots are populated.
DFI's version uses the 680i LT northbridge, losing what are some crucial features, to you, and therefore to me is not a contender in this conversation. Anyone with the hardware you have/ are buying should have the best premuim chipset.
I think Asus boards are difficult and shoddily constructed, but then I've fixed about a million of them at work, so what do I know?
I would recommend that you avoid intel chipsets in this case. Of all of the boards I just spoke of, I personally believe Gigabyte or MSI are the best... but they also cost the most, are the hardest to find. Both boards are on backorder at zipzoomfly.com. The most economical would have to be the P5N32-E SLI from ASUS or the 680i SLI reference board. I heard Mattel is putting out a Barbie version reference board with pink solid state capacitors, but this may just be a rumor. Wouldnt surprise me, everyone else is selling them, lol (yes, that was a joke).
Im waiting on the Gigabyte myself.
Considering your video card choice, I would like to point out the BFG version of the 8800GTX video card. Instead of air cooling, one version has a watercooling block... rather neat when you consider the card becomes a single width card, and doesnt block any other slots. Thermaltake makes a version of the Armor case with watercooling built in. I plan on using this exact setup, and only cooling BFG's 8800GTX with it. Unfortunately, those cards are rather expensive at around $900.
Happy building.