You don't need to use paperclip to do the paperclip test, any metal wire that fits into 24-pin power connector will do.
Here's a video on how to do the test,
youtube:
https://www.youtube.com/watch?v=ixcWCrYpw3Y
Do note that the statement in the video about 90% of the time is wrong due to the fact that video is 4 years old. Since nowadays, many PSUs come with semi-passive fan that doesn't spin until the load on your PSU is about 30% to 50%. So, the correct statement would be that 50% to 60% of the time, you can use paperclip test to see if your PSU works or not.