There's no such thing as a "stock" PC. Each one has its own specs and upgrade requirements and options. Dells have tended to be the worst, in my opinion, for ugrading options as they use[d] proprietary hardware. I used to work for a recovery lab and had to repair Dells. Their PSU's could cost as much as three times the cost of a standard PSU. I hope they are better these days in that respect.