i have noticed that ati not only has the 5 series but ati firepro and 5970 and nvidia has 400 serice
my main question is are they going to be coming out with a new serise soon specially ati and
which combo is better 4gtx480 in sli or 4hd5970 in croosfire with amd phenom IIx4 1055t 3.2ghz
Technically speaking, it's impossible for four way SLI for GTX 480s, and four HD 5970s wouldn't work... only two as it is four GPUs in total and that's all the drivers are programmed to handle. Four GTX 480s should be faster than two HD 5970s in most games, as SLI scales better than CrossFireX, which is logical seeing four GTX 480s cost $2000 while two HD 5970s cost $1400.
ATi may release the HD 6000 series possibly later this year, or early next year. ATi are apparently going to refresh their current HD 5000 lines by the end of the year.