Computer technology marches on and those of us who build and use our own machines see increasing power draws by a lot of the components we place inside them. Dual Core processors, SLI/Crossfire GPU configurations, multiple hard drives and so on all need stable and reliable power.
It is no longer viable to just accept the PSU that comes with a case we may buy. When building your own computer you MUST take into account all the components you will be using, and buy a capable PSU. If you skimp on a PSU with a weak 12v rail when using high end GPU cards then problems will arise at some point, as this review has shown.