Isn't the 805 for tablets, or did I read that wrong? I thought it didn't have a built-in modem.
It isn't specifically for tablets, but you're correct that it has no built in modem. It looks like it is more efficient than the 800/801 it replaces though.
Biggest move I see on the 805 involves the GPU and GPU/Memory interface. The GPU is now significantly faster than an Apple A7 GPU, but the CPU still seems to lag behind a tad.
Looks like it will not consume any more power than the 801 though, due to a more efficient GPU.
i.e. From AT's preview :
"In order to accommodate the wider memory interface but still make Snapdragon 805 suitable for use in a smartphone as well as a tablet, Qualcomm turned to a different packaging technology. " etc etc.
"Excluding 3DMark, we saw a 20 - 50% increase in GPU performance compared to Snapdragon 801. .."
"The gains on the CPU side are far more subtle. At best we noted a 6% increase in performance compared to a 2.5GHz Snapdragon 801..."