It should work but don't try to run unpatched Starcraft 2
... or some "burn-in" tools that will max both cpu and gpu.
As long as you use the computer normally ( no overclock or extreme testing ), you shouldn't have any problems.
However, make sure there's lots of fresh air around that PSU, because it will get quite warm during gaming sessions (it's usage level will sometime hit 80-100% )
Also it probably won't last very long under such loads, so while it will work for now, think about changing it as soon as possible.