So I tried to put a GTX 560 Ti on my Dell MT 435 mobo (R849J). Thing didn't power up at all, just a small puff of smoke came out of my graphics card. Does this mean my mobo can't support the card or did I get a bad card? I tried looking up anything to do with compatibly but all I found was this:
not to sound like a wise guy, but puff of smoke is not a good sign in electronic devices.
If it was me, I'd return it. 850w is plenty of power, and most modern motherboards (post 2004) should be fine in accepting 560 ti. If your system was working fine, and is still working fine when you remove your new GPU, its clear that the new GPU is to blame.