These adapters are VERY USEFUL, especially for powering newer and more advanced graphics cards that require 2 8-pin power connectors as they convert a 6-pin male connector to 2 8-pin connectors. This allows you to install more than one performance-hungry graphics card in your computer. A normal adapter needs 2 6-pin connectors to make an 8-pin connector. As long as your PSU has enough power, this will work fine. However, if your power supply doesn't have enough power, you should probably buy a more powerful one before using these adapters. These adapters are very well made and very easy to use, and their value fully justifies the low price.