A 970 is a fine card, and not a problem on your PSU. If you've got the right PCIe power cables, you could also look at the 390 or 390X, depending on how much money you want to spend. All would be a nice upgrade over what you've got. The 380 basically trades blows with the 960 and the 380X isn't that much better.
Selecting the right testing and assessment provider is an important decision. Count on Prometric for the right test development and delivery solutions. Prometric is a wholly-owned subsidiary of Educational Testing Service (ETS) and a trusted provider of technology-enabled testing and assessment solutions.
To change the location of your computer-delivered GRE General Test from one test center network to another (for example, from a PrometricÂ® test center to a location outside of the Prometric test center network), contact GRE services. Reschedule or Cancel Your Computer-delivered GRE General Test Registration.