Just thought over a couple of things and I am sorry guys to go off the topic of this thread a bit, but well, things need to be cleared:
Primo - I though it is still good to explain once again in brief and general what is SLi, mongoosed (I know, I know, you guys mentioned it to mongoosed). Well shortly and very simplified - one can get better results with two VGA cards running at the same time in a link. Two nVidia cards will be SLI. One card - no SLi. These two VGA cards (which have nVidia video chipsets) will mainly (but not only) run on a mobo with... an nVidia mainboard chipset, not surprisingly, isn't it? Hence for SLi you need an nForce mobo and for your E6600 that means mobos with chipsest that support both Intel Core 2 Duo processors AND SLi. Currently it is only worth looking at boards built on the 650i sli and 680i sli chipsets. But these only support DDR2 - no other choice. I agree with guys that it is best to sell your DDR. The day has come - it would have anyway, inevitably, one day or another.
Secundo - ATI also has an identical technology which it calls CrossFire - two ATI cards, but... on (mainly) an Intel chipset that's worth mentioning, like for example 965P, 975 or brand new P35.
You CAN SLi with two 8800GTX (but that's a clear overspent), OR with two less expensive 8800GTS(640mb ddr3) about which people on some forums say they perfom better than one 8800GTX (here is one thread at good Hexus forums
Hexus-8800sli vs 8800gtx), or perhaps with two even less expensive 8800GTS(320mb ddr3). I am not sure but you can even buy two less expensive 8600GTS and SLI with them. That you can, but the question is - will you?
Now 8800GTX performs great, but rumour goes that the super new 2900XT outperforms it. And new ATI cards are on the way. Don't know if this outperforming isn't a marketing trick, though.
So, first, Mongossed, you will have to decide if you want SLi or CrossFire, or just single but more powerfull VGA card. For that please have a search in forums and reviews and obvserve the performance of the SLI cards over one 8800GTX - just look at the #of FPS in games, that's what you buy two VGAs for.
Second, after you take the decision, give this thread a clue about how much you want to spend for a mobo and I am sure someone will give you a hint in the right direction (of course with all the usual Disclaimers
). Although I think at that tie you might already observe which mobos people use and praise.
Third, don't forget, the expenses will not stop there - for two 8800 VGAs you'll have to buy a really powerful Power Supply Unit/PSU and a nicely cooled case.
To give you a first hint regarding mobos (with only one VGA though) - here is a link to one of the very few first reviews/comparisons done by ocworkbech (quick guys! thanks for your review) between some of the mobos built on the P35, nF680 and 965P chipsets in Fear and 3Dmark05:
Benchmarks - 3Dmark05 and FEAR
To
disposablehero - yes, you are right, I forgot to mention the MSI boards built on the 650i sli (I guess my old dissapointment in MSI did it). I didn't quote all other 650i SLI mobos as well, sorry, but indeed there are such mobos.
If something else come to my mind "I'll be back" and Mongoosed say something!