When speaking about power supply units you often hear of "12V rails", which are sometimes merged and sometimes are not. But what does that mean exactly? What are these mysterious rails? And what makes them important?
So, does that mean that the more 12V rails are available, the better? Well, yes and no. If you need a higher performance or intend to do some major overclocking, one big 12V rail makes a lot of sense. On the other hand, if you use your PC for working, the occasional gaming or video and graphics editing you will probably never need this additional boost. But it's good to have it up your sleeve, in case you might need it.