GTX 295 and 4870X2 comes to mind, both had recommended PSU of 700W or more by Nvidia/ati.
Each generation now has improved power usage all over the line, both for CPU and GPU.
Two gens ago you usually had a 130W CPU, now they are 77W. (i7 920 vs 3770k f.ex)
On my GTX285 it says 215W on the box, a new GTX680 is 190W.
Earlier you needed 650W for a good gaming rig and today you can get away with much less.
This is why most people often tell you that you need more than you actually do, because it was needed 3 years ago.
PSUs are more efficient now and can usually deliver much more on the 12V rail than before too.
Each generation now has improved power usage all over the line, both for CPU and GPU.
Two gens ago you usually had a 130W CPU, now they are 77W. (i7 920 vs 3770k f.ex)
On my GTX285 it says 215W on the box, a new GTX680 is 190W.
Earlier you needed 650W for a good gaming rig and today you can get away with much less.
This is why most people often tell you that you need more than you actually do, because it was needed 3 years ago.
PSUs are more efficient now and can usually deliver much more on the 12V rail than before too.
Desktop HTPC:
Gigabyte Z97X-Gaming5- i7-4790k MSI-B75-E33, i5-2500k
Corsair Vengeance 16GB RAM Crucial 8GB RAM
Gigabyte GTX780 GHz Edt. ASUS GTX960 Strix
Win 10 Pro / OS X 10.10 Win 10 Pro
Gigabyte Z97X-Gaming5- i7-4790k MSI-B75-E33, i5-2500k
Corsair Vengeance 16GB RAM Crucial 8GB RAM
Gigabyte GTX780 GHz Edt. ASUS GTX960 Strix
Win 10 Pro / OS X 10.10 Win 10 Pro