My GTX 970 is also EVGA so, if brand names are to be of concern, I have also found an alternative that's also EVGA that's bronze 80+ and is also currently on sale. 100w less than the the previous one I shared though I also doubt an XPS 8300 Dell is going to be power hungry to need 700. I've tried out the Newegg PSU calculator with my setup and, it barely scrapes past maybe 490. This one is not modular however if mixing PSU cables is a problem anyways then perhaps non-modular would be a way to go.