tri sli like quad sli, is hard to make drivers for. Though tri sli is more succesful than quad, it isn't for any1 because sometimes it might need manual tweaking and patience. I don't have tri sli 280s anymore I have 2 way sli 285s.
Unless the game is generous or you have a big screen I would stick to 2 or 1 card. I only have tri because I like seeing high frames, I mostly play with only 1 enabled. Its mroe than enough power under 1 of the gpus.
I would suggest sticking with 1 gpu, 4870, 260 GTX or 280 GTX if you want top contenders, or wait for new revisions by ATI.
I would steer clear of dual GPU cards all together since they have min frame rate problems. If I would go ATi, I would rather have 2 4870s than 1 4870 X2. I've seen alot of benchies (google it
😛) that show for some reason 1 4870s do come out ontop though they were the 1 gig version.
What boad do you have? sli crossfire? tri sli?
both tri and quad are over rated. Though tri scales, you just don't need that power unless your maxing AA at high resolutions. Though i do hear that there is a bug for Nvidia cards at 2560x1600 for tri sli, but I don't know if it was fixed or not.
From most of th results I've seen
280(285) GTX tri > 295 GTX sli > 4870 X2 quad > 280(285) GTX sli > 295 GTX > 4870 X2~260 GTX sli > etc..
http://www.behardware.com/articles/736-15/report-4-radeon-hd-4870s-versus-3-geforce-gtx-280s.html
Just a general idea, but both nvidia and ATi have gotten some really good upgrades in drivers lately so this might be changed...this chart is from Dec 2.
