The problem with 8800GT SLI is that SLI does not always scale 100%. Usually its like 30%, and then the 4870 usually beats 8800GT SLI. The 4870 is one GPU, and almost never produces mixed results with different games like two 8800GT does.
At 1680x1050 resolution the 8800GT SLI option looks very strong compared to one HD4870 and 2x HD4850 CF.
And you can get the nice cool & quiet double slot or aftermarket cooler, or factory OC models and still save $120+ over HD4870 or HD4850CF.
In Anandtechs review the 2-8800GT SLI almost always beat the single HD4870 (exception QuakeWars) Bioshock pretty much equal, all the rest at all resolutions the 8800GT in SLI beat it. I'm not badmouthing the 4870, it and the 4850 are great cards and i thank ATI for giving us all a real choice in what GPU we can buy.
To me, this all depends on how much you want to spend, and how much performance you want. I posted a long time ago, wed now have these options, and multicore was the future. I like the options with the multicore setups, and by that I mean sli/cf or any x2 card out there. Its better for us consumers. Thank you ATI
GTX 260? Whats that? At $400 vs $300 for the 4870, who cares?
Single slot and Intel CF ready (Dunno if you knew but the Intel chipsets (CF only) OC a CPU much better and have 70% of the market.
So why dream of wasting $100 and get a 4870.
Fanboi or not, I spent $500 on a ATI card when it was tops, then went EVGA 8800GT, now ATI 4870 (when I can get water on it and find a 4870). The tables have turned.
I'd really like a GTX 280, but it's price is stoopid.
You're making my head hurt, allow me to explain. I use an "SLI motherboard" with 2 8800GTs
HD 4870 single is a downgrade from SLI 8800 GT - the only way I would've bought a 4870 is if the performance was astronomical, which it wasn't, even if it was a great video card.
In order to get a markable upgrade on an AMD platform I would have to get a "Crossfire motherboard", and get 2 HD4870s.
The fact is the 260gtx is parallel to the 4870, and even if it costs 100$ more per card - I would pay the exact same and maybe even more for an x48 motherboard in the longrun, so it is not a sensible route to take unless I want to goto the trouble of selling a motherboard just to get the exact same performance I would get out of slightly more expensive but equal cost in the long run vid cards.