but how about the temps? i got HD4870 1GB edition 54C at full load, and i wonder what temps might be appear when HD4870x2 + HD4870 ( 2GB+1GB) Tri-CF.
I never had any issues with cooling, I did have 7 120mm fans in my case though....
With that being said, your 48701GB will stay at recommended temps, it is the X2 you should worry about. I ended up buying an arctic cooling accelero Xtreme cooler for my X2, which ended up being a great cooler, after some issues were sorted.
Check this thread out as well: http://www.tomshardware.com/forum/265403-33-arctic-cooling-accelero-4870x2-review