lowriderflow :
8350 stock will definietly use 200w at full load. if you overclock it with a liquid loop up to like 4.8 or 5.0 ghz, then it will eat up 300w at full load.
you'll be ok with a good name brand 500w if you're buying a stock reference 280x and planning to leave the 8350 at stock speeds with stock cooling unit. a cheapo 500w will probably have issues.
but considering a 700w is probably only $20-$30 more... get the 700w so you have some room to grow and do some overclocking at some point
I don't know if you're trolling or what, but the 200-300W on load means the power consumption of the entire system, not just the CPU. There is no way the CPU could use much more than 125W on load, why would AMD give false numbers?
UPDATE: With these specs:
http://www.bit-tech.net/hardware/2012/11/06/amd-fx-8350-review/2
The entire system uses this much:
http://www.bit-tech.net/hardware/2012/11/06/amd-fx-8350-review/7
"For this test, we leave the PC doing nothing but displaying the Windows 7 desktop (with Aero enabled) for a few minutes and record the wattage drawn from the wall via a power meter."