Bottleneck a videocard? You should know that SSD can help with SSD gaming times, but generally do not increase the FPS (frames per second) of your game. It does decrease loading times.
The benefit of SSDs is quick booting, quick launch of applications, instant application response, etc.
If you are in the market for an SSD, i highly recommend the Intel X25-V 40GB or the X25-M 80GB. Both are excellent system disks that will be useful for at least a decade.