XPS 8950 Aurora R13/14 750w psu noise

User reported worst one is MP23Y.  M92DC is good.  M2G8X much less noise than the worst one.

“Upper is good, lower is the noisy one”

MP23Y 750W, Acbel (XPS 8950, Aurora R13/R14, Precision 3660)
M92DC 750W, Chicony (XPS 8950, Aurora R13/R14, Precision 3660)
M2G8X 750W, LiteOn (XPS 8950, Aurora R13/R14, Precision 3660)

“lite-on has a bit of noise, audible if you pay attention, it’s much less than the worst one.”

https://www.reddit.com/r/Alienware/comments/sqp24m/comment/hy84s7k/