Okay thanks, I guess that answers one of my questions.

Are you suggesting that I buy another 875 PSU?

I have read that there is ... case fans and case lights compatibility issues when changing up the power supply.

Area-51 R1 has those issues, Aurora doesn't; the size issue you heard of is real, due to its small case form factor / chassis, and so new cables can be too short or too long or just right, depending; flat ribbon cables tend to be best when running dual-cards vs round sleeved cables; a short CPU 8pin extension might be needed. Other than cables, aftermarket power supplies tend to be a direct drop-in for Aurora, after you trudge through old case harness removal. A power supply chassis that isn't longer than 7.5inches / 190mm is best, the shorter the better (6 7/8" - 7")

Least expensive / fastest way to replace is to uncouple the chassis there & plug & play with Dell part# W299G or J556T

Some swap material + links gathered @NotebookReview Aurora section: post #31 & #33